CeO_2对镁铝硅钛系统微晶玻璃的相变和介电性能影响  

Phase Transition and Dielectric Properties of MgO-Al_2O_3-SiO_2-TiO_2 Glass-ceramics Adding CeO_2

作　　者：董继鹏[1] 何飞[1] 罗澜[1] 陈玮[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2007年第1期35-39,共5页Journal of Inorganic Materials

摘　　要：运用DTA、XRD、SEM等测试手段,研究了CeO2添加到MgO-Al2O3-SiO2-TiO2系统后玻璃的形成,相变和介电性能．研究结果表明,在MgO-Al2O3-SiO2-TiO2系统中引入CeO2可以降低玻璃的析晶倾向,玻璃的相变过程也随之变化,随着CeO2含量的增加,硅钛铈矿相出现,金红石和堇青石的相对含量均有所减少,而硅钛铈矿相的相对含量不断增加．在微波频率下(10GHz),材料的介电常数可在7．5-10．5范围内调控,介电损耗<5．5×10-4．The glass-forming, the crystallization process and microwave dielectric properties of MgO- Al2O3-SiO2-TiO2 system glasses adding CeO2 were investigated by means of DTA, XRD, SEM. Results show that spontaneous crystallization of the MgO-Al2O3-SiO2-TiO2 system glasses is obviously prevented with the increass of CeO2 content. After heat treatment （nucleation at 770℃ for 4h and cryatal growth at 1200℃ for 1.5h） the crystallized volume fraction of rutile and cordierite decrease and that of perrierite increases. The glass-ceramics obtained by crystallization of the glasses have dielectric constant of 7.5-10.5, and microwave loss less than 5.5×10^-4.

关 键 词：微晶玻璃 微波材料 镁铝硅钛铈玻璃 

分 类 号：TQ174[化学工程—陶瓷工业]