助剂对ZnO-SiO_2陶瓷烧结和性能的影响  

Effects of Sintering aid on the Sintering Characteristics and Properties of ZnO-SiO_2 Ceramics

作　　者：邹佳丽[1] 张启龙[1] 杨辉[1] 曹蕾[1] 

机构地区：[1]浙江大学材料与化学工程学院,浙江杭州310007

出　　处：《压电与声光》2008年第4期459-461,464,共4页Piezoelectrics & Acoustooptics

基　　金：浙江省重大科技攻关基金资助项目(2006C11119)

摘　　要：研究了Bi2O3-SiO2烧结助剂预合成对ZnO-0.6SiO2陶瓷烧结和微波介电性能的影响。750℃预烧后的Bi2O3-SiO2烧结助剂能形成液相,有效地将ZnO-0.6SiO2陶瓷的烧结温度从1 380℃降至990℃。随助剂添加量的增加,ZnO-0.6SiO2陶瓷的介电常数(rε)略有提高,品质因数(Q×f)随之下降,频率温度系数(τf)无明显变化。添加3%~10%(质量分数)预合成的Bi2O3-SiO2助剂后,ZnO-0.6SiO2陶瓷在990℃保温2 h,获得微波介电性能为:rε=6.19~6.59,Q×f=37 500~41 800 GHz(测试频率f=11 GHz),τf=(-52.9^-50.1)×10-6/℃。The effects of pre-calcined Bi2 O3-SiO2 sintering aid on the sintering characteristics and microwave dielectric properties of ZnO-0.6SiO2 ceramics were investigated. The Bi2 O3-SiO2 sintering aid calcined at 750℃ can form the liquid phase, and reduce the sintering temperature of ZnO-0. 6SiO2 ceramics effectively from 1 380 ℃ to 990 ℃. With increasing the additive amount, the dielectric constant ετ of ZnO-0.6SiO2 ceramics increased slightly, the quality factor values Q× f decreased and the temperature coefficient of frequency τf were not affected a lot. With 3%-10% Bi2O3-SiO2 sintering aid, ZnO-0. 6SiO2 ceramics sintered at 990 ℃ for 2 h shows excellent dielectric properties with ετ =6.19-6.59, Q×f=37 500-41 800 GHz（at 11 GHz） and τf= （-52.9- -50.1） × 10^-6/℃.

关 键 词：微波介质陶瓷 ZnO-SiO2系统 助剂预合成 低温烧结 

分 类 号：TQ174[化学工程—陶瓷工业]