SiO_2-Al_2O_3-ZnO-SrO-La_2O_3系微晶玻璃性能的研究  

Properties of SiO_2-Al_2O_3-ZnO-SrO-La_2O_3 Glass-Ceramic System

作　　者：王伟[1] 陈庚[1] 戚凭[1] 

机构地区：[1]青岛大学物理科学学院,山东青岛266071

出　　处：《青岛大学学报（自然科学版）》2011年第4期40-44,50,共6页Journal of Qingdao University(Natural Science Edition)

摘　　要：SiO2-Al2O3-ZnO-SrO-La2O3为基本成分制备了微晶玻璃样品,在750℃下不同时间热处理。用微波微扰法测量其微波介电性能,结合扫描电镜和X射线衍射分析了其晶相。结果表明,随保温时间的延长,样品的主晶相经历了SrZrSi2O7→SrAl2Si2O8→新玻璃相La2ZrTiO7的变化。SrAl2Si2O8相是亚稳过渡相。反应生成的新玻璃相La2ZrTiO7的Q值高达1 800,温度系数约为+500×10-6/℃。The basic components of glass ceramic specimens, which are derived by heat treatment with dif ferent time at 750 ℃, were SiO2-Al2O3-ZnO-SrO-La2O3. The dielectric property was measured by pertur- bation method, combined with SEM and XRD to analyze crystal phase. Results show that with the in crease of holding time ,the main phase of specimens experiences a transformation as SrZrSi2O7→ SrAl2Si2 O8→ new glass phase La2ZrTiO7. SrAl2Si2O8 phase is a metastable transition phase. Quality factor of the new glass phase La2ZrTiOr obtained is 1 800, and temperature coefficient is 500× 10 ^-9/℃.

关 键 词：微晶玻璃 介电常数 品质因数 温度系数 微波 

分 类 号：O487[理学—固体物理] TQ171.71[理学—物理]