CaF_2掺杂ZnNb_2O_6微波介质陶瓷的结构特征  

Structure Characteristics of CaF_2-doped ZnNb_2O_6Microwave Dielectric Ceramics

作　　者：张迎春[1] 李龙土[1] 桂治轮[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室

出　　处：《黑龙江科技学院学报》2002年第2期1-3,30,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家自然科学基金重大项目(59995523);国家高技术研究发展计划项目(2001AA320502)

摘　　要：用传统固相法合成了CaF2掺杂ZnNb2O6微波介质陶瓷,通过XRD、SEM、EDS等对其微结构进行了系统的研究,结果显示,Ca2+已经固溶到晶格中取代Zn2+形成CaNb2O6没有发现晶界玻璃相,0．5%CaF2掺杂可使ZnNb2O6陶瓷的烧结温度从 1150℃降到1080℃,并且具有较好的微波介电特性。The paper introduces the preparation of CaF2 -doped ZnNb2O6 microwave Dielectric Ceramics by traditional ceramics route. The systematic study of the microstructures of ZnNb2O6 Ceramics doped with CaF2 by XRD, SEM and EDS shows that Ca2+ has replaced Zn2+ in crystal structure to form CaNb2O6, the glass phases being not observed at grain-boundary junctions. ZnNb2O6 ceramics doped with CaF2 show a better microwave dielectric property.

关 键 词：微波介质陶瓷 ZnNb2O6 CAF2 微结构 烧成温度 固相法 

分 类 号：TQ174.758[化学工程—陶瓷工业]