Abstract The solid-state sintering route was employed for the production of (1-x)Bi2(Li0.5Ta1.5)O7-xTiO2 (x = 0, 0.02, 0.04, 0.06, 0.08) ceramics. The phase, microstructure and microwave dielectric properties of each ceramic composition were determined via X-ray diffraction, scanning electron microscopy and Haki Colmon resonator technique, respectively. The dielectric constant, tan δ and AC conductivity were also determined for the composition of x=0.04. The TiO2 addition developed new phases of Bi3Ti4O12 and Bi3TaTiO9 for x=0.04 along with Bi2(Li0.5Ta1.5)O7 phase which disappeared for x=0.08. The τf of Bi2(Li0.5Ta1.5)O7 was tuned through zero by TiO2 addition and good microwave dielectric properties er∼67.2, Qufo∼13767 GHz and τf ∼ −1.45 ppm/oC can be obtained for the composition of x=0.04 sintered at 1050 oC for 2h. This ceramic composition is a suitable candidate for 5G cellular base station resonator application.

中文翻译：

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用于 5G 蜂窝基站谐振器应用的 Bi2(Li0.5Ta1.5)O7-TiO2 基陶瓷的微波介电性能

摘要 采用固相烧结工艺制备(1-x)Bi2(Li0.5Ta1.5)O7-xTiO2 (x = 0, 0.02, 0.04, 0.06, 0.08)陶瓷。分别通过 X 射线衍射、扫描电子显微镜和 Haki Colmon 谐振器技术确定了每种陶瓷组合物的相、微观结构和微波介电性能。对于 x=0.04 的组成，还确定了介电常数、tan δ 和 AC 电导率。添加 TiO2 后，x=0.04 时形成了新的 Bi3Ti4O12 和 Bi3TaTiO9 相，以及 x=0.08 时消失的 Bi2(Li0.5Ta1.5)O7 相。Bi2(Li0.5Ta1.5)O7 的 τf 通过添加 TiO2 调为零，良好的微波介电性能 er∼67.2, Qufo∼13767 GHz 和 τf ∼ -1.45 ppm/oC 对于 x=0.04在 1050 oC 下烧结 2 小时。