TY  - JOUR
AU  - Radonjić, L.
AU  - Todorović, M.
AU  - Miladinović, Jelena
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1259
AB  - Ferroelectric nanostructured barium titanate (BT) thin films derived by a modified sol-gel process were formed by a deep coating method on Si (100) substrate. In this work was investigated the influence of different types and amounts of water (free water directly added in process and crystalline water from barium precursors) and of different barium precursors (hydroxide and acetate) on the gel-structure evolution and the barium titanate thin film crystallization. The IR-spectroscopy and X-ray diffraction analysis were used for sample characterization. Experimental results show that crystalline water from barium hydroxide octahydrate stabilizes the cubic phase of barium titanate. Barium titanate crystallizes in the tetragonal form in thin films when sols were prepared with free water and Ba-acetate or Ba-hydroxide monohydrate as precursors. The type of Ba-precursor used in preparation of sols effects the rate of crystallization of the BT in thin films, making it slower in the case when as precursor was used Ba-acetate than Ba-hydroxides. The prepared BT-thin films demonstrated good adhesion towards substrate and were smooth and uniform.
PB  - Springer, New York
T2  - Journal of Sol-Gel Science and Technology
T1  - Structural evolution of nanostructured barium titanate thin film sol-gel derived
EP  - 132
IS  - 2
SP  - 125
VL  - 45
DO  - 10.1007/s10971-007-1664-1
ER  - 

@article{
author = "Radonjić, L. and Todorović, M. and Miladinović, Jelena",
year = "2008",
abstract = "Ferroelectric nanostructured barium titanate (BT) thin films derived by a modified sol-gel process were formed by a deep coating method on Si (100) substrate. In this work was investigated the influence of different types and amounts of water (free water directly added in process and crystalline water from barium precursors) and of different barium precursors (hydroxide and acetate) on the gel-structure evolution and the barium titanate thin film crystallization. The IR-spectroscopy and X-ray diffraction analysis were used for sample characterization. Experimental results show that crystalline water from barium hydroxide octahydrate stabilizes the cubic phase of barium titanate. Barium titanate crystallizes in the tetragonal form in thin films when sols were prepared with free water and Ba-acetate or Ba-hydroxide monohydrate as precursors. The type of Ba-precursor used in preparation of sols effects the rate of crystallization of the BT in thin films, making it slower in the case when as precursor was used Ba-acetate than Ba-hydroxides. The prepared BT-thin films demonstrated good adhesion towards substrate and were smooth and uniform.",
publisher = "Springer, New York",
journal = "Journal of Sol-Gel Science and Technology",
title = "Structural evolution of nanostructured barium titanate thin film sol-gel derived",
pages = "132-125",
number = "2",
volume = "45",
doi = "10.1007/s10971-007-1664-1"
}

Radonjić, L., Todorović, M.,& Miladinović, J.. (2008). Structural evolution of nanostructured barium titanate thin film sol-gel derived. in Journal of Sol-Gel Science and Technology
Springer, New York., 45(2), 125-132.
https://doi.org/10.1007/s10971-007-1664-1

Radonjić L, Todorović M, Miladinović J. Structural evolution of nanostructured barium titanate thin film sol-gel derived. in Journal of Sol-Gel Science and Technology. 2008;45(2):125-132.
doi:10.1007/s10971-007-1664-1 .

Radonjić, L., Todorović, M., Miladinović, Jelena, "Structural evolution of nanostructured barium titanate thin film sol-gel derived" in Journal of Sol-Gel Science and Technology, 45, no. 2 (2008):125-132,
https://doi.org/10.1007/s10971-007-1664-1 . .

TY  - JOUR
AU  - Radonjić, L.
AU  - Todorović, M.
AU  - Miladinović, Jelena
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/825
AB  - Transparent, nanostructured glass ceramics based on ferroelectric solid solutions of the type Na1-xLixNbO3 (in very narrow composition regions for x=0.12 and 0.93) and LiNb1-yTayO3 (y=0.5 unlimited solid solubility), can be obtained by controlled crystallization of glass. The parent glass samples were prepared by conventional melt-quenching technique. Heat-treatment of the parent glasses was performed at the various temperatures, for the same time. The glass structure evolution during the controlled crystallization was examined by FT-IR spectroscopy analysis. Crystalline phases were identified by X-ray diffraction analysis and SEM was used for microstructure characterization. Densities of the crystallized glasses were measured by Archimedean principle. The capacitance and dielectric loss tangent were measured at a frequency of 1 kHz, at the room temperature. It was found that in the all investigated systems crystallize solid solutions Na1-xLixNbO3 and LiNb1-yTayO3 in the glassy matrix, have crystal size on nanoscale (less than 100nm), which is one of requirements to get a transparent glass ceramic that could be a good ferroelectric material regarding to the measured properties.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering B-Solid State Materials for Advanced Technology
T1  - Nanostructured sodium lithium niobate and lithium niobium tantalate solid solutions obtained by controlled crystallization of glass
EP  - 70
IS  - 1-2
SP  - 64
VL  - 121
DO  - 10.1016/j.mseb.2005.03.003
ER  - 

@article{
author = "Radonjić, L. and Todorović, M. and Miladinović, Jelena",
year = "2005",
abstract = "Transparent, nanostructured glass ceramics based on ferroelectric solid solutions of the type Na1-xLixNbO3 (in very narrow composition regions for x=0.12 and 0.93) and LiNb1-yTayO3 (y=0.5 unlimited solid solubility), can be obtained by controlled crystallization of glass. The parent glass samples were prepared by conventional melt-quenching technique. Heat-treatment of the parent glasses was performed at the various temperatures, for the same time. The glass structure evolution during the controlled crystallization was examined by FT-IR spectroscopy analysis. Crystalline phases were identified by X-ray diffraction analysis and SEM was used for microstructure characterization. Densities of the crystallized glasses were measured by Archimedean principle. The capacitance and dielectric loss tangent were measured at a frequency of 1 kHz, at the room temperature. It was found that in the all investigated systems crystallize solid solutions Na1-xLixNbO3 and LiNb1-yTayO3 in the glassy matrix, have crystal size on nanoscale (less than 100nm), which is one of requirements to get a transparent glass ceramic that could be a good ferroelectric material regarding to the measured properties.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering B-Solid State Materials for Advanced Technology",
title = "Nanostructured sodium lithium niobate and lithium niobium tantalate solid solutions obtained by controlled crystallization of glass",
pages = "70-64",
number = "1-2",
volume = "121",
doi = "10.1016/j.mseb.2005.03.003"
}

Radonjić, L., Todorović, M.,& Miladinović, J.. (2005). Nanostructured sodium lithium niobate and lithium niobium tantalate solid solutions obtained by controlled crystallization of glass. in Materials Science and Engineering B-Solid State Materials for Advanced Technology
Elsevier Science Sa, Lausanne., 121(1-2), 64-70.
https://doi.org/10.1016/j.mseb.2005.03.003

Radonjić L, Todorović M, Miladinović J. Nanostructured sodium lithium niobate and lithium niobium tantalate solid solutions obtained by controlled crystallization of glass. in Materials Science and Engineering B-Solid State Materials for Advanced Technology. 2005;121(1-2):64-70.
doi:10.1016/j.mseb.2005.03.003 .

Radonjić, L., Todorović, M., Miladinović, Jelena, "Nanostructured sodium lithium niobate and lithium niobium tantalate solid solutions obtained by controlled crystallization of glass" in Materials Science and Engineering B-Solid State Materials for Advanced Technology, 121, no. 1-2 (2005):64-70,
https://doi.org/10.1016/j.mseb.2005.03.003 . .

TY  - JOUR
AU  - Radonjić, L.
AU  - Todorović, M..
AU  - Miladinović, Jelena
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/733
AB  - The subject of this work is the study of nanostructured sodium niobate obtained by a controlled crystallisation of glass. The glass samples of the composition within the system NaNbO3-SiO2-Al2O3 were prepared by melting and then crystallised by a heat treatment method at previously determined temperatures and times. Transparent, nanostructured glass ceramic, based on NaNbO3 crystals, was obtained. Infrared absorption spectroscopy analysis of the prepared glass samples shows that the sodium ions are situated in a glass network nearer to SiO4-tetrahedra than NbO6-octahedra. XRD analysis of the crystallised glass samples shows that phase separation precedes the nucleation of NaNbO3 in glass matrix.
T2  - Physics and Chemistry of Glasses
T1  - Glass formation and crystallisation behaviour of nanostructured sodium niobate by direct glass crystallisation
EP  - 203
IS  - 2
SP  - 201
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_technorep_733
ER  - 

@article{
author = "Radonjić, L. and Todorović, M.. and Miladinović, Jelena",
year = "2005",
abstract = "The subject of this work is the study of nanostructured sodium niobate obtained by a controlled crystallisation of glass. The glass samples of the composition within the system NaNbO3-SiO2-Al2O3 were prepared by melting and then crystallised by a heat treatment method at previously determined temperatures and times. Transparent, nanostructured glass ceramic, based on NaNbO3 crystals, was obtained. Infrared absorption spectroscopy analysis of the prepared glass samples shows that the sodium ions are situated in a glass network nearer to SiO4-tetrahedra than NbO6-octahedra. XRD analysis of the crystallised glass samples shows that phase separation precedes the nucleation of NaNbO3 in glass matrix.",
journal = "Physics and Chemistry of Glasses",
title = "Glass formation and crystallisation behaviour of nanostructured sodium niobate by direct glass crystallisation",
pages = "203-201",
number = "2",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_technorep_733"
}

Radonjić, L., Todorović, M..,& Miladinović, J.. (2005). Glass formation and crystallisation behaviour of nanostructured sodium niobate by direct glass crystallisation. in Physics and Chemistry of Glasses, 46(2), 201-203.
https://hdl.handle.net/21.15107/rcub_technorep_733

Radonjić L, Todorović M, Miladinović J. Glass formation and crystallisation behaviour of nanostructured sodium niobate by direct glass crystallisation. in Physics and Chemistry of Glasses. 2005;46(2):201-203.
https://hdl.handle.net/21.15107/rcub_technorep_733 .

Radonjić, L., Todorović, M.., Miladinović, Jelena, "Glass formation and crystallisation behaviour of nanostructured sodium niobate by direct glass crystallisation" in Physics and Chemistry of Glasses, 46, no. 2 (2005):201-203,
https://hdl.handle.net/21.15107/rcub_technorep_733 .

TY  - JOUR
AU  - Radonjić, L.
AU  - Todorović, M.
AU  - Miladinović, Jelena
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/732
AB  - The influence of various processing parameters is investigated during sol formation (metal precursors: titanium (IV) butoxide, barium hydroxide, barium acetate; pH of sol solution; type and amount of stabiliser and solvent; amount of water) and on the properties of the resulting gel. A relationship is established between sol-gel structure and the temperatures of BaTiO3 crystallisation and the structured evolution of layers deposited on the substrate Si (100). Experiments revealed the stable and suitable BaTiO3 Sol structures, responsible for low temperature crystallisation of BaTiO3. The IR, DTA and XRD analysis provide sample characterisation. The obtained results show that by using titanium (IV) butoxide and barium hydroxide monohydrate may be obtained a thin BaTiO3 layer at the low crystallisation temperatures, between 600 and 700 degrees C, with only the tetragonal phase of barium titanate present.
T2  - Physics and Chemistry of Glasses
T1  - Processing of ferroelectric thin layers of barium titanate by the sol-gel method
EP  - 214
IS  - 2
SP  - 211
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_technorep_732
ER  - 

@article{
author = "Radonjić, L. and Todorović, M. and Miladinović, Jelena",
year = "2005",
abstract = "The influence of various processing parameters is investigated during sol formation (metal precursors: titanium (IV) butoxide, barium hydroxide, barium acetate; pH of sol solution; type and amount of stabiliser and solvent; amount of water) and on the properties of the resulting gel. A relationship is established between sol-gel structure and the temperatures of BaTiO3 crystallisation and the structured evolution of layers deposited on the substrate Si (100). Experiments revealed the stable and suitable BaTiO3 Sol structures, responsible for low temperature crystallisation of BaTiO3. The IR, DTA and XRD analysis provide sample characterisation. The obtained results show that by using titanium (IV) butoxide and barium hydroxide monohydrate may be obtained a thin BaTiO3 layer at the low crystallisation temperatures, between 600 and 700 degrees C, with only the tetragonal phase of barium titanate present.",
journal = "Physics and Chemistry of Glasses",
title = "Processing of ferroelectric thin layers of barium titanate by the sol-gel method",
pages = "214-211",
number = "2",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_technorep_732"
}

Radonjić, L., Todorović, M.,& Miladinović, J.. (2005). Processing of ferroelectric thin layers of barium titanate by the sol-gel method. in Physics and Chemistry of Glasses, 46(2), 211-214.
https://hdl.handle.net/21.15107/rcub_technorep_732

Radonjić L, Todorović M, Miladinović J. Processing of ferroelectric thin layers of barium titanate by the sol-gel method. in Physics and Chemistry of Glasses. 2005;46(2):211-214.
https://hdl.handle.net/21.15107/rcub_technorep_732 .

Radonjić, L., Todorović, M., Miladinović, Jelena, "Processing of ferroelectric thin layers of barium titanate by the sol-gel method" in Physics and Chemistry of Glasses, 46, no. 2 (2005):211-214,
https://hdl.handle.net/21.15107/rcub_technorep_732 .

TY  - JOUR
AU  - Radonjić, L.
AU  - Todorović, M.
AU  - Miladinović, Jelena
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/700
AB  - The subject of this work was to obtain nanostructured sodium niobate crystals by a controlled crystallization method from glasses. The glass samples of the composition within the system NaNbO3-SiO2-Al2O3 were prepared by melting and then subjected to crystallization by heat treatment, at previously determined temperatures and times. Transparent, nanostructured glass-ceramics based on NaNbO3 crystals were obtained. FT IR-absorption spectroscopy has been used to interpret structural changes of the prepared glass samples during the heat treatment. XRD analysis of the crystallized glass samples shows that phase separation precedes the nucleation of NaNbO3 in glass matrix and the lowest temperature of the sodium niobate nucleation is 700degreesC. SEM analysis of the crystallized glasses shows that the crystal size of NaNbO3 was on nanoscale.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Nanostructured sodium niobate obtained by glass crystallization
EP  - 432
IS  - 2-3
SP  - 427
VL  - 88
DO  - 10.1016/j.matchemphys.2004.08.011
ER  - 

@article{
author = "Radonjić, L. and Todorović, M. and Miladinović, Jelena",
year = "2004",
abstract = "The subject of this work was to obtain nanostructured sodium niobate crystals by a controlled crystallization method from glasses. The glass samples of the composition within the system NaNbO3-SiO2-Al2O3 were prepared by melting and then subjected to crystallization by heat treatment, at previously determined temperatures and times. Transparent, nanostructured glass-ceramics based on NaNbO3 crystals were obtained. FT IR-absorption spectroscopy has been used to interpret structural changes of the prepared glass samples during the heat treatment. XRD analysis of the crystallized glass samples shows that phase separation precedes the nucleation of NaNbO3 in glass matrix and the lowest temperature of the sodium niobate nucleation is 700degreesC. SEM analysis of the crystallized glasses shows that the crystal size of NaNbO3 was on nanoscale.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Nanostructured sodium niobate obtained by glass crystallization",
pages = "432-427",
number = "2-3",
volume = "88",
doi = "10.1016/j.matchemphys.2004.08.011"
}

Radonjić, L., Todorović, M.,& Miladinović, J.. (2004). Nanostructured sodium niobate obtained by glass crystallization. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 88(2-3), 427-432.
https://doi.org/10.1016/j.matchemphys.2004.08.011

Radonjić L, Todorović M, Miladinović J. Nanostructured sodium niobate obtained by glass crystallization. in Materials Chemistry and Physics. 2004;88(2-3):427-432.
doi:10.1016/j.matchemphys.2004.08.011 .

Radonjić, L., Todorović, M., Miladinović, Jelena, "Nanostructured sodium niobate obtained by glass crystallization" in Materials Chemistry and Physics, 88, no. 2-3 (2004):427-432,
https://doi.org/10.1016/j.matchemphys.2004.08.011 . .