摘要
以钡长石(BaAl2Si2O8)为主晶相的BaO-Al2O3-SiO2(BAS)系微晶玻璃具有高的耐热温度、机械强度,具有较好的抗氧化性能和抗碱蚀能力,具有高的化学稳定性,与多种热、机械增强材料都有良好的化学相容性。而且,单斜钡长石的电绝缘和介电性能良好。因此,BAS系微晶玻璃作为高温结构材料和功能陶瓷材料均有相当多的应用。本文在评述BAS系微晶玻璃的不同制备工艺、加速六方钡长石→单斜钡长石晶型转变的不同手段与机理的基础上,介绍了BAS系微晶玻璃作为结构材料和功能材料的多种应用,指出了国内外的研究差距,并作出了研究展望。
Barium aluminosilicate(BAS) glass-ceramics,having monoclinic celsian,BaAl_2Si_2O_8,as the major crystalline phase,is a material characterized by high melting point,high mechanical resistance,great chemical stability,low dielectric constant,and therefore has applications for high temperature structural applications in hot sections of turbine engines,reflecting mirror substrate,electromagnetic windows or radome application at high temperature,packaging for microelectronics,high voltage condensers and other electric insulating products.Applications of BAS glass-ceramics,as stated above,are reviewed on the basis of an overview of synthesis methods of it,and accelerating methods and mechanisms for hexacelsian to monoclinic celsian transformation in it.Moreover,some research suggestions,especially for domestic researchers,are proposed.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2007年第4期634-639,643,共7页
Journal of Materials Science and Engineering
基金
中国高科技研究发展计划("863"计划)资助项目(2004AA32G090)
关键词
微晶玻璃
钡长石
制备
形核
晶型转变
应用
glass-ceramics
celsian
synthesis
nucleation
phase transformation
applications
