【摘要】 研究了H3BO3,CaO-SiO2-B2O3玻璃料及V2O5的添加对MgTiO3陶瓷的烧结和介电性能的影响,并对影响机理作了初步探讨。结果表明:合适的添加剂能够使MgTiO3陶瓷在1240～1300℃之间烧结;添加质量分数为3%的H3BO3,V2O5或1%的CaO-SiO2-B2O3玻璃料的MgTiO3陶瓷的介电常数分别为20.8,17.5和19.8,在5～20MHz下,介电损耗低,多为10-4数量级;在10kHz下,介电常数的温度系数在-66×10-6/℃左右,是一种性能良好的微波介质材料。更多还原

【Abstract】 The influence of the additives such as H3BO3, CaO- SiO2- B 2O3 frit and V2O5 on sintering and dielectric properties of MgTiO3 ceramics was investigated,and the mechanism was also discussed.The results show that MgTiO3 ceramics with proper additives can be sintered between 1260C and 1280C.The dielectric constant of MgTiO3 ceramics with 3wt% H3BO3,V2O5 or 1wt% CaO-SiO2-B2O3 frit is 20.8,17.5 and 19.8 respectively.The dielectric loss is low about 10-4 between 5MHz and 20 MHz.The temperature coefficient at 10kHz is about -66×10-6/C.The material has good dielectric properties,which can be used as microwave dielectric material.更多还原