Crystallization kinetic and thermal and electrical properties of β-spodumene_ss/cordierite glass–ceramics

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• 作者：R. B. Nuernberg ; C. A. Faller…
• 关键词：Glass–ceramics ; Cordierite ; β ; Spodumene ; Thermal properties ; Crystallization kinetic
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：127
• 期：1
• 页码：355-362
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

The aim of the present work was to investigate the crystallization kinetic of spodumene-/cordierite-based glass–ceramics. Thus, three glasses were prepared with compositions based predominantly on cordierite and β-spodumene_ss crystalline phases, and a mass ratio 1:1 of both phases. The kinetic parameters were determined by means of non-isothermal methods using differential thermal analysis. A multi-peaks fit method was used based on the Fraser–Suzuki equation to determine the crystallization temperature peak. The crystallization kinetic was investigated using the Ozawa and Kissinger methods. The samples were crystalized according to DTA analyses and characterized by using X-ray diffraction. Additionally, the coefficient of thermal expansion and electrical properties of the glass–ceramics was determined. The results showed activation energy for crystallization ranging from 121 to 333 kJ mol−1. The main crystalline phases were β-spodumene_ss to composition L, cordierite and β-quartz_ss to composition C and β-quartz_ss and spinel to composition CL. Taking into account the thermal and electrical properties of the heat-treated samples, these glass–ceramics show potential to LTCC (low thermal co-fired ceramics) application.