Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics

© 2017 Glass-ceramics containing bismuth germanate were fabricated using the conventional melt-quenching method. Glasses have been prepared from BiO 1.5 -GeO 2 -BO 1.5 ternary glass system by focusing on the region of 59 mol% BiO 1.5 : 23 mol% GeO 2 : 18 mol% BO 1.5 . The non-isothermal crystallizat...

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Main Authors: Surapong Panyata, Sukum Eitssayeam, Gobwute Rujijanagul, Tawee Tunkasiri, Kamonpan Pengpat
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/46524
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spelling th-cmuir.6653943832-465242018-04-25T07:21:45Z Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics Surapong Panyata Sukum Eitssayeam Gobwute Rujijanagul Tawee Tunkasiri Kamonpan Pengpat Materials Science Agricultural and Biological Sciences © 2017 Glass-ceramics containing bismuth germanate were fabricated using the conventional melt-quenching method. Glasses have been prepared from BiO 1.5 -GeO 2 -BO 1.5 ternary glass system by focusing on the region of 59 mol% BiO 1.5 : 23 mol% GeO 2 : 18 mol% BO 1.5 . The non-isothermal crystallizations kinetic were studied by thermal analysis at various heating rates of 5, 10, 15, 20 °C/min. The resulting glass was analyzed by using differential thermal analysis (DTA) for determining the crystallization temperature (T p ). Then, the prepared glass pieces were heat treated at T p . The element composition analysis of the quenched glass performed by energy dispersive X-ray fluorescence (EDXRF) analysis. X-ray diffraction (XRD) was used to obtain the phase formation of the heat treated glass-ceramics. Physical properties and their morphologies of the obtained glass-ceramics were also investigated. This crystallization kinetic result can be used to evaluate the crystallization potential of the interesting glasses. In the non-isothermal kinetics process, the average (E a ) value was 302.95 ± 2.25 kJ/mol. The calculated value of the Avrami parameter (n) by using Ozawa equation was found to be 1.69 which indicated that the crystallization mechanism was diffusion control with a one-dimensional crystal growth. 2018-04-25T06:56:09Z 2018-04-25T06:56:09Z 2017-08-01 Journal 02728842 2-s2.0-85021193166 10.1016/j.ceramint.2017.05.217 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85021193166&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/46524
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Materials Science
Agricultural and Biological Sciences
spellingShingle Materials Science
Agricultural and Biological Sciences
Surapong Panyata
Sukum Eitssayeam
Gobwute Rujijanagul
Tawee Tunkasiri
Kamonpan Pengpat
Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
description © 2017 Glass-ceramics containing bismuth germanate were fabricated using the conventional melt-quenching method. Glasses have been prepared from BiO 1.5 -GeO 2 -BO 1.5 ternary glass system by focusing on the region of 59 mol% BiO 1.5 : 23 mol% GeO 2 : 18 mol% BO 1.5 . The non-isothermal crystallizations kinetic were studied by thermal analysis at various heating rates of 5, 10, 15, 20 °C/min. The resulting glass was analyzed by using differential thermal analysis (DTA) for determining the crystallization temperature (T p ). Then, the prepared glass pieces were heat treated at T p . The element composition analysis of the quenched glass performed by energy dispersive X-ray fluorescence (EDXRF) analysis. X-ray diffraction (XRD) was used to obtain the phase formation of the heat treated glass-ceramics. Physical properties and their morphologies of the obtained glass-ceramics were also investigated. This crystallization kinetic result can be used to evaluate the crystallization potential of the interesting glasses. In the non-isothermal kinetics process, the average (E a ) value was 302.95 ± 2.25 kJ/mol. The calculated value of the Avrami parameter (n) by using Ozawa equation was found to be 1.69 which indicated that the crystallization mechanism was diffusion control with a one-dimensional crystal growth.
format Journal
author Surapong Panyata
Sukum Eitssayeam
Gobwute Rujijanagul
Tawee Tunkasiri
Kamonpan Pengpat
author_facet Surapong Panyata
Sukum Eitssayeam
Gobwute Rujijanagul
Tawee Tunkasiri
Kamonpan Pengpat
author_sort Surapong Panyata
title Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
title_short Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
title_full Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
title_fullStr Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
title_full_unstemmed Non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
title_sort non-isothermal crystallization kinetics of bismuth germanate glass-ceramics
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85021193166&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/46524
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