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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (14): 1394-1398. 上一篇    下一篇

研究简报

P2O5对Li2O-SiO2-Al2O3-K2O-ZnO体系微晶玻璃析晶性能的影响

刘晓秋*,1, 宋文植2, 王景云1, 孙宏晨*,1, 杨海滨*,3, 邹广田3, 欧阳喈1   

  1. (1吉林大学口腔医学院 长春 130041)
    (2吉林大学中日联谊医院 长春 130031)
    (3吉林大学超硬材料重点实验室 长春 130012)
  • 投稿日期:2006-12-29 修回日期:2007-04-03 发布日期:2007-07-28
  • 通讯作者: 刘晓秋

Effect of P2O5 Addition on the Crystallization Properties of Li2O-SiO2-Al2O3-K2O-ZnO Glass-Ceramic

LIU Xiao-Qiu*,1; SONG Wen-Zhi2; WANG Jing-Yun1; SUN Hong-Chen*,1; YANG Hai-Bin*,3; ZOU Guang-Tian3; OUYANG Jie1   

  1. (1 School of Stomatology, Jilin University, Changchun 130041)
    (2 China-Japan Union Hospital, Jilin University, Jilin University, Changchun 130031)
    (3 National Laboratory of Superhard Materials, Jilin University, Changchun 130012)
  • Received:2006-12-29 Revised:2007-04-03 Published:2007-07-28
  • Contact: LIU Xiao-Qiu

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采用差热分析、X射线衍射及扫描电镜分析手段研究了P2O5对Li2O-SiO2-Al2O3-K2O-ZnO体系牙科微晶玻璃析晶性能的影响, 并确定了P2O5的最适含量. 结果发现P2O5是该玻璃体系的有效成核剂, 未添加P2O5的玻璃体系成核密度低, 热处理后不能形成微晶体, 且主晶相为硅酸锂; 添加P2O5使玻璃在热处理后形成以二硅酸锂为主晶相的微晶玻璃. 该玻璃体系中添加4.5 wt%的P2O5可以得到较高体积含量和理想显微结构的牙科二硅酸锂微晶玻璃. P2O5含量为6 wt%的基质玻璃发生乳浊, 呈不透明的乳白色.

关键词: P2O5, 微晶玻璃, 析晶

Differential Thermal Analyses (DTA), X-Ray Diffraction analyses (XRD) and Scanning Electron Microscopy (SEM) were used to study the effect of P2O5 addition on the crystallization properties of dental glass-ceramics in the Li2O-SiO2-Al2O3-K2O-ZnO glass system. It was concluded that P2O5 was an effective nucleating agent for this glass system. The nucleation density of this glass system was too low to form tiny crystal after heat-treatment, when it contained no P2O5, and the major crystal phase was lithium silicate. Adding P2O5 resulted in major tiny crystal phase of lithium disilicate after heat-treatment. 4.5 wt% of P2O5 could give high content and prospecting SEM appearance of dental lithium disilicate glass-ceramic. 6.0 wt% of P2O5 opacified base glass.

Key words: P2O5, glass-ceramics, crystallization