TY  - JOUR
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković-Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Savić, Slavica M.
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Podlogar, Matejka
AU  - Kocen, Matej
AU  - Rapljenović, Željko
AU  - Ivek, Tomislav
AU  - Lazović, Vladimir
AU  - Dojčinović, Biljana
AU  - Branković, Goran
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4403
AB  - Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics
EP  - 5575
IS  - 15
SP  - 5566
VL  - 40
DO  - 10.1016/j.jeurceramsoc.2020.06.062
ER  - 

@article{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković-Golić, Danijela and Ribić, Vesna and Branković, Zorica and Savić, Slavica M. and Dapčević, Aleksandra and Bernik, Slavko and Podlogar, Matejka and Kocen, Matej and Rapljenović, Željko and Ivek, Tomislav and Lazović, Vladimir and Dojčinović, Biljana and Branković, Goran",
year = "2020",
abstract = "Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics",
pages = "5575-5566",
number = "15",
volume = "40",
doi = "10.1016/j.jeurceramsoc.2020.06.062"
}

Vukašinović, J., Počuča-Nešić, M., Luković-Golić, D., Ribić, V., Branković, Z., Savić, S. M., Dapčević, A., Bernik, S., Podlogar, M., Kocen, M., Rapljenović, Ž., Ivek, T., Lazović, V., Dojčinović, B.,& Branković, G.. (2020). The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 40(15), 5566-5575.
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062

Vukašinović J, Počuča-Nešić M, Luković-Golić D, Ribić V, Branković Z, Savić SM, Dapčević A, Bernik S, Podlogar M, Kocen M, Rapljenović Ž, Ivek T, Lazović V, Dojčinović B, Branković G. The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society. 2020;40(15):5566-5575.
doi:10.1016/j.jeurceramsoc.2020.06.062 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković-Golić, Danijela, Ribić, Vesna, Branković, Zorica, Savić, Slavica M., Dapčević, Aleksandra, Bernik, Slavko, Podlogar, Matejka, Kocen, Matej, Rapljenović, Željko, Ivek, Tomislav, Lazović, Vladimir, Dojčinović, Biljana, Branković, Goran, "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics" in Journal of the European Ceramic Society, 40, no. 15 (2020):5566-5575,
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062 . .

TY  - CONF
AU  - Savić, Slavica M.
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Knežević, Nikola
AU  - Mladenović, Minja
AU  - Đokić, Veljko
AU  - Branković, Zorica
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6103
AB  - Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - SBA-15 Assisted SnO2 Humidity Sensor
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6103
ER  - 

@conference{
author = "Savić, Slavica M. and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knežević, Nikola and Mladenović, Minja and Đokić, Veljko and Branković, Zorica",
year = "2019",
abstract = "Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "SBA-15 Assisted SnO2 Humidity Sensor",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6103"
}

Savić, S. M., Vojisavljević, K., Počuča-Nešić, M., Knežević, N., Mladenović, M., Đokić, V.,& Branković, Z.. (2019). SBA-15 Assisted SnO2 Humidity Sensor. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research..
https://hdl.handle.net/21.15107/rcub_technorep_6103

Savić SM, Vojisavljević K, Počuča-Nešić M, Knežević N, Mladenović M, Đokić V, Branković Z. SBA-15 Assisted SnO2 Humidity Sensor. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_technorep_6103 .

Savić, Slavica M., Vojisavljević, Katarina, Počuča-Nešić, Milica, Knežević, Nikola, Mladenović, Minja, Đokić, Veljko, Branković, Zorica, "SBA-15 Assisted SnO2 Humidity Sensor" in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019),
https://hdl.handle.net/21.15107/rcub_technorep_6103 .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Savić, Slavica M.
AU  - Počuča-Nešić, Milica
AU  - Đokić, Veljko
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6106
AB  - In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-EmmettTeller specific surface area of 33 m2
/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-Halenda model from the desorption branch of the N2 adsorption/desorption isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and accessible pore structure of the material. Wide-angle X-ray diffraction (XRD) measurement confirmed the formation of the tetragonal SnO2 phase. Because of the low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Humidity Sensor Based on Mesoporous SnO2 Fabricated via Nanocasting Technique
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6106
ER  - 

@conference{
author = "Vojisavljević, Katarina and Savić, Slavica M. and Počuča-Nešić, Milica and Đokić, Veljko and Ribić, Vesna and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-EmmettTeller specific surface area of 33 m2
/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-Halenda model from the desorption branch of the N2 adsorption/desorption isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and accessible pore structure of the material. Wide-angle X-ray diffraction (XRD) measurement confirmed the formation of the tetragonal SnO2 phase. Because of the low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Humidity Sensor Based on Mesoporous SnO2 Fabricated via Nanocasting Technique",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6106"
}

Vojisavljević, K., Savić, S. M., Počuča-Nešić, M., Đokić, V., Ribić, V., Branković, Z.,& Branković, G.. (2019). Humidity Sensor Based on Mesoporous SnO2 Fabricated via Nanocasting Technique. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research..
https://hdl.handle.net/21.15107/rcub_technorep_6106

Vojisavljević K, Savić SM, Počuča-Nešić M, Đokić V, Ribić V, Branković Z, Branković G. Humidity Sensor Based on Mesoporous SnO2 Fabricated via Nanocasting Technique. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_technorep_6106 .

Vojisavljević, Katarina, Savić, Slavica M., Počuča-Nešić, Milica, Đokić, Veljko, Ribić, Vesna, Branković, Zorica, Branković, Goran, "Humidity Sensor Based on Mesoporous SnO2 Fabricated via Nanocasting Technique" in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019),
https://hdl.handle.net/21.15107/rcub_technorep_6106 .

TY  - JOUR
AU  - Savić, Slavica M.
AU  - Stojanović, G.
AU  - Vasiljević, D.
AU  - Vojisavljević, K.
AU  - Dapčević, Aleksandra
AU  - Radojković, Aleksandar
AU  - Prsić, S.
AU  - Branković, Goran
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3286
AB  - The chemical synthesis of nickel manganite powder was performed by a complex polymerization method (CPM). The obtained fine nanoscaled powders were uniaxially pressed and sintered at different temperatures: 1000-1200 degrees C for 2 h, and different atmospheres: air and oxygen. The highest density was obtained for the sample sintered at 1200 degrees C in oxygen atmosphere. The energy for direct band gap transition (Eg) calculated from the Tauc plot decreases from 1.51 to 1.40 eV with the increase of the sintering temperature. Indentation experiments were carried out using a three-sided pyramidal (Berkovich) diamond tip, and Young's modulus of elasticity and hardness of NTC (negative temperature coefficient) ceramics at various indentation depths were calculated. The highest hardness (0.754 GPa) and elastic modulus (16.888 GPa) are exhibited by the ceramics sintered at highest temperature in oxygen atmosphere.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method
EP  - 12282
IS  - 10
SP  - 12276
VL  - 42
DO  - 10.1016/j.ceramint.2016.04.174
ER  - 

@article{
author = "Savić, Slavica M. and Stojanović, G. and Vasiljević, D. and Vojisavljević, K. and Dapčević, Aleksandra and Radojković, Aleksandar and Prsić, S. and Branković, Goran",
year = "2016",
abstract = "The chemical synthesis of nickel manganite powder was performed by a complex polymerization method (CPM). The obtained fine nanoscaled powders were uniaxially pressed and sintered at different temperatures: 1000-1200 degrees C for 2 h, and different atmospheres: air and oxygen. The highest density was obtained for the sample sintered at 1200 degrees C in oxygen atmosphere. The energy for direct band gap transition (Eg) calculated from the Tauc plot decreases from 1.51 to 1.40 eV with the increase of the sintering temperature. Indentation experiments were carried out using a three-sided pyramidal (Berkovich) diamond tip, and Young's modulus of elasticity and hardness of NTC (negative temperature coefficient) ceramics at various indentation depths were calculated. The highest hardness (0.754 GPa) and elastic modulus (16.888 GPa) are exhibited by the ceramics sintered at highest temperature in oxygen atmosphere.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method",
pages = "12282-12276",
number = "10",
volume = "42",
doi = "10.1016/j.ceramint.2016.04.174"
}

Savić, S. M., Stojanović, G., Vasiljević, D., Vojisavljević, K., Dapčević, A., Radojković, A., Prsić, S.,& Branković, G.. (2016). Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method. in Ceramics International
Elsevier Sci Ltd, Oxford., 42(10), 12276-12282.
https://doi.org/10.1016/j.ceramint.2016.04.174

Savić SM, Stojanović G, Vasiljević D, Vojisavljević K, Dapčević A, Radojković A, Prsić S, Branković G. Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method. in Ceramics International. 2016;42(10):12276-12282.
doi:10.1016/j.ceramint.2016.04.174 .

Savić, Slavica M., Stojanović, G., Vasiljević, D., Vojisavljević, K., Dapčević, Aleksandra, Radojković, Aleksandar, Prsić, S., Branković, Goran, "Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method" in Ceramics International, 42, no. 10 (2016):12276-12282,
https://doi.org/10.1016/j.ceramint.2016.04.174 . .

TY  - JOUR
AU  - Luković-Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Ćirković, Jovana
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Tasić, Nikola
AU  - Savić, Slavica M.
AU  - Počuča Nešić, Milica
AU  - Marković, Smilja
AU  - Branković, Goran
AU  - Marinković-Stanojević, Zorica
AU  - Branković, Zorica
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3473
AB  - BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods
EP  - 1631
IS  - 7
SP  - 1623
VL  - 36
DO  - 10.1016/j.jeurceramsoc.2016.01.031
ER  - 

@article{
author = "Luković-Golić, Danijela and Radojković, Aleksandar and Ćirković, Jovana and Dapčević, Aleksandra and Pajić, Damir and Tasić, Nikola and Savić, Slavica M. and Počuča Nešić, Milica and Marković, Smilja and Branković, Goran and Marinković-Stanojević, Zorica and Branković, Zorica",
year = "2016",
abstract = "BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods",
pages = "1631-1623",
number = "7",
volume = "36",
doi = "10.1016/j.jeurceramsoc.2016.01.031"
}

Luković-Golić, D., Radojković, A., Ćirković, J., Dapčević, A., Pajić, D., Tasić, N., Savić, S. M., Počuča Nešić, M., Marković, S., Branković, G., Marinković-Stanojević, Z.,& Branković, Z.. (2016). Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 36(7), 1623-1631.
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031

Luković-Golić D, Radojković A, Ćirković J, Dapčević A, Pajić D, Tasić N, Savić SM, Počuča Nešić M, Marković S, Branković G, Marinković-Stanojević Z, Branković Z. Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society. 2016;36(7):1623-1631.
doi:10.1016/j.jeurceramsoc.2016.01.031 .

Luković-Golić, Danijela, Radojković, Aleksandar, Ćirković, Jovana, Dapčević, Aleksandra, Pajić, Damir, Tasić, Nikola, Savić, Slavica M., Počuča Nešić, Milica, Marković, Smilja, Branković, Goran, Marinković-Stanojević, Zorica, Branković, Zorica, "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods" in Journal of the European Ceramic Society, 36, no. 7 (2016):1623-1631,
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031 . .

TY  - JOUR
AU  - Prsić, S.
AU  - Savić, Slavica M.
AU  - Branković, Zorica
AU  - Vrtnik, S.
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2992
AB  - In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo(2-x)CuxO(4) (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 degrees C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to gamma-NaCo2O4 and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu2+ substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by the CAC method, and it was almost twice higher than in the undoped sample confirming the significant influence of Cu-doping with even small concentrations.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramicsh
EP  - 487
SP  - 480
VL  - 640
DO  - 10.1016/j.jallcom.2015.04.003
ER  - 

@article{
author = "Prsić, S. and Savić, Slavica M. and Branković, Zorica and Vrtnik, S. and Dapčević, Aleksandra and Branković, Goran",
year = "2015",
abstract = "In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo(2-x)CuxO(4) (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 degrees C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to gamma-NaCo2O4 and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu2+ substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by the CAC method, and it was almost twice higher than in the undoped sample confirming the significant influence of Cu-doping with even small concentrations.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramicsh",
pages = "487-480",
volume = "640",
doi = "10.1016/j.jallcom.2015.04.003"
}

Prsić, S., Savić, S. M., Branković, Z., Vrtnik, S., Dapčević, A.,& Branković, G.. (2015). Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramicsh. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 640, 480-487.
https://doi.org/10.1016/j.jallcom.2015.04.003

Prsić S, Savić SM, Branković Z, Vrtnik S, Dapčević A, Branković G. Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramicsh. in Journal of Alloys and Compounds. 2015;640:480-487.
doi:10.1016/j.jallcom.2015.04.003 .

Prsić, S., Savić, Slavica M., Branković, Zorica, Vrtnik, S., Dapčević, Aleksandra, Branković, Goran, "Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramicsh" in Journal of Alloys and Compounds, 640 (2015):480-487,
https://doi.org/10.1016/j.jallcom.2015.04.003 . .