| Effect of nucleating agents on microstructure and mechanical properties of SiO2-Al2O3-ZrO2 glass-ceramics |
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| 作者姓名： | 余丽萍 肖汉宁 胡鹏飞 |
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| 作者单位： | [1]School of Materials Science and Engineering, Hunan University, Changsha 410082, China [2]School of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 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.
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| 关 键 词： | 玻璃 陶瓷 微观结构 机械性能 X光衍射 |
| 文章编号： | 1005-9784（2005）05-0507-04 |
| 收稿时间： | 2005-01-12 |
| 修稿时间： | 2005-03-16 |
Effect of nucleating agents on microstructure and mechanical properties of SiO2-Al2O3-ZrO2 glass-ceramics |
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| Yu Li-ping , Xiao Han-ning and Hu Peng-fei.Effect of nucleating agents on microstructure and mechanical properties of SiO2-Al2O3-ZrO2 glass-ceramics[J].Journal of Central South University of Technology,2005,12(5):507-510. |
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| Authors: | Yu Li-ping Xiao Han-ning and Hu Peng-fei |
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| Affiliation: | (1) School of Materials Science and Engineering, Hunan University, 410082 Changsha, China;(2) School of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, China |
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| Abstract: | 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. |
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| Keywords: | glass-ceramics SiO2-Al2O3-ZrO2 system microstructure mechanical property |
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