BaO对LAS微晶玻璃结构和性能的影响.pdfVIP

32 22 武 汉 理 工 大 学 学 报 Vol. 32 No. 22 2010 11 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY Nov. 2010 DOI: 10. 3963/ j. issn. 2010. 22. 018 BaO LAS 谢 军, 谢 俊, 林墨洲 ( , 430070) : BaO 具有较好的助熔性质, 起到改善玻璃熔制的效果通过锂铝硅系统三元相图设计 掺杂不同含量的 BaO 微晶玻璃组分, 研究 BaO 含量变化对LA 微晶玻璃的结构和性能的影响研究结果表明: 随着BaO 引入量的增加, 能 促进LA 系微晶玻璃的晶型转变, 析出更稳定的主晶相, 热膨胀系数增大, 力学性能先增强后降低经 850 晶化的微 晶玻璃主晶相发育得更完全, 生长得更致密, 表现出更好的结构和性能在掺杂BaO 为 2. 5% 的微晶玻璃经750 核 化850 晶化处理后呈现的结构和性能最为优异 : 微晶玻璃; LA 系统; 助熔剂; 晶化; 性能 : T Q 171 : A :2010) Effect of BaO on Structure and Propert es of LAS Glassceram cs X IE Jun , X IE J un , LIN M oz hou ( Key Laboratory of ilicate Materials cience and Engineering, Ministry of Education, Wuhan Universit y of Technology, Wuhan 430070, China) Abstract: BaO has a good effect on melting and molding . According to LA system glassceramics phase graph, a series of composition of LA w ere designed in order to research the relationship of the structure and propert ies of LA glassceramics and different amounts of BaO doped in it. T he results show that as the content of BaO increases, can promote LA glassceramics crystal morphology change, the more stable crystal separate out . T he thermal expansion coefficient of LA glassceramics in creased and mechanical properties increased first then decreased. At 850 crystallization of the sample showed better structure and performance. LA B system glassceramics structure and performance can be obtained: when BaO was 2. 5% and nucleation temperature at 750 , crystallization temperature