摘要
利用同时析晶的方法,通过调整云母和β-锂辉石两者的含量可得到具有可加工性、低膨胀系数的复合材料,可应用在牙科材料中。采用差热分析(DTA)、X衍射分析(XRD)、扫描电镜(SEM)等分析手段对该系统微晶玻璃析晶过程及微观结构进行研究,根据差热分析确定热处理工艺控制理想晶相的析出,这是得到理想性能复合材料的关键。其中β-锂辉石成分有增强基体硬度的作用,但是当它的含量超过50%时就会削弱基体的可加工性能,通过调整β-锂辉石的含量最终得到膨胀系数<40×10-7/℃,而且具有优良加工性能的材料。
Simultaneous crystallization of fluorophlogopite and beta-spodumene solid solutions is adjusted to achieve machinable porcelain with low expansion coefficient for dental application.The crystallization and microstructure of this system glass-ceramics studied by DTA,XRD and SEM.Based on thermal analysis determination to heat treatment process control crystalling phase separation,it is successfully employed to achieve the desired porcelain.The beta-spodumene phase tends to harden the body and thereby impair the machinability character when its proportion approaches more than 50%.An expansion coefficient 40×10-7 /℃ with good machinability is achieved by adjusting the content of beta-spodumene.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第1期167-171,共5页
Bulletin of the Chinese Ceramic Society
关键词
云母
Β-锂辉石
加工性能
低膨胀系数
fluorophlogopite
beta-spodumene
machinable porcelain
low expansion coefficient
