东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (9): 866-869.DOI: -

• 论著 • 上一篇    下一篇

CaO对CaO-Al_2O_3-SiO_2系微晶玻璃析晶行为的影响

史培阳;姜茂发;刘承军;王德永   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-09-15 发布日期:2013-06-25
  • 通讯作者: Shi, P.-Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50204005)

Effect of CaO on crystallization behavior of CaO-Al2O3-SiO2 system glass ceramics

Shi, Pei-Yang (1); Jiang, Mao-Fa (1); Liu, Cheng-Jun (1); Wang, De-Yong (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-09-15 Published:2013-06-25
  • Contact: Shi, P.-Y.
  • About author:-
  • Supported by:
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摘要： 利用烧结工艺制备微晶玻璃以CaO Al2O3 SiO2三元系微晶玻璃为研究对象,通过DTA,XRD,SEM分析方法,对玻璃析晶动力学进行研究·利用Kissinger方程来计算微晶玻璃析晶转变的活化能E,发现随着氧化钙含量的增加,析晶温度降低,析晶活化能降低,并最终推导出析晶机理参数n=2,体系属于整体析晶·实验结果发现:微晶玻璃的析晶相均为硅灰石结构;氧化钙含量的增加有利于微晶玻璃的晶化,但表面缺陷更明显,如:坑点、突起、断裂等·

关键词: 微晶玻璃, 晶化, 活化能, 晶化参数, 烧结工艺

Abstract: Several glass ceramics of CaO-Al2O3-SiO2 system were prepared via sintering process and investigated by means of DTA, XRD and SEM, based on crystallization kinetics. The activation energy E, for the crystallization transform of such glasses are calculated by Kissinger equation, and it is found that the activation energy decreases with increasing CaO content and decreasing crystallization temperature. As a result, an inference is drawn that the system is integrally crystallized if the characteristic parameter n=2. Experimental results reveal that the crystallization phase of such glasses are all of wollastonite, and the increasing CaO content is beneficial to the further crystallization of glass ceramic. But, at the same time, it brings more obvious defects to glass surface, such as pits, outshoots and cracks.

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