The effect of K2O on the crystallization of niobium germanate glasses
Autori
Matijašević, Srđan D.Tošić, Mihajlo B.
Grujić, Snežana
Stojanović, Jovica
Živanović, Vladimir D.
Nikolić, J. D.
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The effect of K2O content on the crystallization of niobium germanate glasses with 22.7- 24.27 wt% of GeO2 and 54.59-57.48 wt% of Nb2O5 was examined. The glasses crystallize by primary crystallization and the formed crystalline phases were K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 and KNbO3. Increasing the K2O content caused a decrease in the GeO2 content of the primary phases. The effect of the K2O content on the kinetics of primary crystallization was analyzed. It was demonstrated that an increase of the K2O content decreased the activation energy of crystal growth at first of the crystallization peaks (Ec1). At second crystallization peaks the activation energies of crystal growth increased (Ec2).
Ispitan je uticaj sadržaja K2O na kristalizaciju niobijum germanatnih stakala sa 22,7-24,27 mas % GeO2 i 54,59-57,48 mas % Nb2O5. Ova stakla kristališu primarnom kristalizacijom i stvaraju se kristalne faze K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 i KNbO3. Povećanje sadržaja K2O prouzrokuje smanjenje sadržaja GeO2 u primarnim fazama. Analiziran je uticaj sadržaja K2O na kinetiku primarne kristalizacije. Pokazano je da povećanje sadržaja K2O smanjuje energiju aktivacije rasta kristala na prvom kristalizacionom piku (Ec1). Na drugom kristalizacionom piku energije aktivacije rasta kristala se povećavaju (Ec2).
Ključne reči:
crystallization / kinetics / niobium germanate glasses / kristalizacija / kinetika / niobijum germanatna staklaIzvor:
Science of Sintering, 2011, 43, 1, 47-53Izdavač:
- International Institute for the Science of Sintering, Beograd
Finansiranje / projekti:
- Fenomeni i procesi sinteze novih staklastih i nanostrukturnih staklo-keramičkih materijala (RS-MESTD-Basic Research (BR or ON)-172004)
- Razvoj stakala sa kontrolisanim otpuštanjem jona za primenu u poljoprivredi i medicini (RS-MESTD-Technological Development (TD or TR)-34001)
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Matijašević, Srđan D. AU - Tošić, Mihajlo B. AU - Grujić, Snežana AU - Stojanović, Jovica AU - Živanović, Vladimir D. AU - Nikolić, J. D. PY - 2011 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1832 AB - The effect of K2O content on the crystallization of niobium germanate glasses with 22.7- 24.27 wt% of GeO2 and 54.59-57.48 wt% of Nb2O5 was examined. The glasses crystallize by primary crystallization and the formed crystalline phases were K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 and KNbO3. Increasing the K2O content caused a decrease in the GeO2 content of the primary phases. The effect of the K2O content on the kinetics of primary crystallization was analyzed. It was demonstrated that an increase of the K2O content decreased the activation energy of crystal growth at first of the crystallization peaks (Ec1). At second crystallization peaks the activation energies of crystal growth increased (Ec2). AB - Ispitan je uticaj sadržaja K2O na kristalizaciju niobijum germanatnih stakala sa 22,7-24,27 mas % GeO2 i 54,59-57,48 mas % Nb2O5. Ova stakla kristališu primarnom kristalizacijom i stvaraju se kristalne faze K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 i KNbO3. Povećanje sadržaja K2O prouzrokuje smanjenje sadržaja GeO2 u primarnim fazama. Analiziran je uticaj sadržaja K2O na kinetiku primarne kristalizacije. Pokazano je da povećanje sadržaja K2O smanjuje energiju aktivacije rasta kristala na prvom kristalizacionom piku (Ec1). Na drugom kristalizacionom piku energije aktivacije rasta kristala se povećavaju (Ec2). PB - International Institute for the Science of Sintering, Beograd T2 - Science of Sintering T1 - The effect of K2O on the crystallization of niobium germanate glasses EP - 53 IS - 1 SP - 47 VL - 43 UR - https://hdl.handle.net/21.15107/rcub_technorep_1832 ER -
@article{ author = "Matijašević, Srđan D. and Tošić, Mihajlo B. and Grujić, Snežana and Stojanović, Jovica and Živanović, Vladimir D. and Nikolić, J. D.", year = "2011", abstract = "The effect of K2O content on the crystallization of niobium germanate glasses with 22.7- 24.27 wt% of GeO2 and 54.59-57.48 wt% of Nb2O5 was examined. The glasses crystallize by primary crystallization and the formed crystalline phases were K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 and KNbO3. Increasing the K2O content caused a decrease in the GeO2 content of the primary phases. The effect of the K2O content on the kinetics of primary crystallization was analyzed. It was demonstrated that an increase of the K2O content decreased the activation energy of crystal growth at first of the crystallization peaks (Ec1). At second crystallization peaks the activation energies of crystal growth increased (Ec2)., Ispitan je uticaj sadržaja K2O na kristalizaciju niobijum germanatnih stakala sa 22,7-24,27 mas % GeO2 i 54,59-57,48 mas % Nb2O5. Ova stakla kristališu primarnom kristalizacijom i stvaraju se kristalne faze K6Nb6Ge4O26, K3.8Nb5Ge3O20.4 i KNbO3. Povećanje sadržaja K2O prouzrokuje smanjenje sadržaja GeO2 u primarnim fazama. Analiziran je uticaj sadržaja K2O na kinetiku primarne kristalizacije. Pokazano je da povećanje sadržaja K2O smanjuje energiju aktivacije rasta kristala na prvom kristalizacionom piku (Ec1). Na drugom kristalizacionom piku energije aktivacije rasta kristala se povećavaju (Ec2).", publisher = "International Institute for the Science of Sintering, Beograd", journal = "Science of Sintering", title = "The effect of K2O on the crystallization of niobium germanate glasses", pages = "53-47", number = "1", volume = "43", url = "https://hdl.handle.net/21.15107/rcub_technorep_1832" }
Matijašević, S. D., Tošić, M. B., Grujić, S., Stojanović, J., Živanović, V. D.,& Nikolić, J. D.. (2011). The effect of K2O on the crystallization of niobium germanate glasses. in Science of Sintering International Institute for the Science of Sintering, Beograd., 43(1), 47-53. https://hdl.handle.net/21.15107/rcub_technorep_1832
Matijašević SD, Tošić MB, Grujić S, Stojanović J, Živanović VD, Nikolić JD. The effect of K2O on the crystallization of niobium germanate glasses. in Science of Sintering. 2011;43(1):47-53. https://hdl.handle.net/21.15107/rcub_technorep_1832 .
Matijašević, Srđan D., Tošić, Mihajlo B., Grujić, Snežana, Stojanović, Jovica, Živanović, Vladimir D., Nikolić, J. D., "The effect of K2O on the crystallization of niobium germanate glasses" in Science of Sintering, 43, no. 1 (2011):47-53, https://hdl.handle.net/21.15107/rcub_technorep_1832 .