Effect of nucleating agents on microstructure and mechanical properties of SiO_2-Al_2O_3-ZrO_2 glass-ceramics

作     者：余丽萍 肖汉宁 胡鹏飞 

作者机构：School of Materials Science and Engineering Hunan University Changsha 410082 China School of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081 China School of Materials Science and Engineering Hunan University Changsha 410082 China 

出 版 物：《Journal of Central South University of Technology》 (中南工业大学学报（英文版）)

年 卷 期：2005年第12卷第5期

页      面：507-510页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Project(2003AA332040)supportedbytheNationalHighTechnologyResearchandDevelopmentProgramofChina 

主　　题：glass-ceramics SiO2-Al2O3-ZrO2 system microstructure mechanical property 

摘      要：SiO2-Al2O3-ZrO2 glasses with different nucleating agents were crystallized under special processing schedule. The microstructure and mechanical properties of the glass-ceramics in SiO2-Al2O3-ZrO2 system were investigated by differential scanning calorimetry, scanning electron microscopy, X-ray diffraction and three-point bending method. The results show that ZrO2 is not an effective nucleating agent in SiO2-Al2O3-ZrO2 system, while TiO2 is effective for the separation of spinel, and P2O5 facilitates solubility of ZrO2 in glass and crystallization. The main crystalline phases of the glass-ceramics are spinel, anorthite and tetragonal zirconia. With the increase of ZrO2 content in the glass, glass-ceramics show higher bending strength （120MPa） than others.