摘要
研究了传统固相反应法制得的MgLnGaO_4(Ln=La,Nd,Sm)陶瓷相组成、显微结构、烧结性能与微波介电性能之间的关系。结果表明:通过添加不同稀土元素所得的MgLaGaO_4和MgNdGaO_4试样为单一正交钙钛矿结构;而MgSmGaO_4试样形成的是A_3B_5O_12型石榴石结构固溶体。当烧结条件为1420℃/4 h时,MgSmGaO_4陶瓷可获得最佳的微波介电性能,介电常数为12.599,品质品数为70657.16 GHz(f=8.85 GHz),谐振频率温度系数为-7.2×10-7/℃。
MgLnGaO4 （Ln=La, Nd, Sm） ceramics were prepared by solid-phase reaction method. The relationships among their phase composition, microstructures, sintering characteristics, and microwave dielectric properties were studied. The results show that the MgLaGaO4 and MgNdGaO4 samples obtained by adding different rare earth elements have orthorhombic perovskite structures, while the MgSmGaO, sample is the A3B5O12-type garnet structure solid solution. When the MgSmGaO, sample is sintered at 1 420 ℃for 4h, the MgSmGaO4 ceramic has the best microwave dielectric properties. The dielectric constant is 12.599, the quality factor is 70657.16 GHz （f=8.85 GHz）, and the temperature coefficient of resonant frequency （rf） is -7.2×10^-7/℃.
作者
崔英姿
黄先培
刘飞
李波
刘心宇
Cui Yingzi Huang Xianpei Liu Fei Li Bo Liu Xinyu(Suihua University, Suihua 152000, China Guilin University of Electronic Technology, Guilin 541004, China Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China)
出处
《绝缘材料》
CAS
北大核心
2017年第9期21-24,29,共5页
Insulating Materials
基金
国家自然科学基金资助项目(61561011)
关键词
钙钛矿
石榴石
微波介电性能
陶瓷
perovskite
garnet
microwave dielectric properties
ceramic
