New lithium bismuth phosphate ceramic: crystal structure, microstructure, microwave dielectric properties and co-firing compatibility with aluminum electrode

作者：Liu, Xiaobin^*; Yang, Shenghui; Wang, Haiquan; Wang, Kangguo; Xie, Xiaolan; Zhou, Huanfu

来源：Journal of Materials Science: Materials in Electronics , 2022, 33(13): 10114-10120.

DOI：10.1007/s10854-022-08001-6

A new type of lithium bismuth phosphate 3Li(2)O-Bi2O3-6P(2)O(5) (3L1B6P) microwave dielectric ceramics were prepared via a conventional solid-state route. Crystal structure, microstructure, microwave dielectric properties and aluminum electrode co-firing compatibility of the 3L1B6P ceramics were investigated. The 3L1B6P ceramics mainly consists of a new phase similar to the NdLiP4O12 with monoclinic structure [C2/C(15)]. The 3L1B6P ceramics are composed of BiLiP4O12 grains of similar to 10 mu m in length and similar to 2 mu m in width and BiPO4 grains of similar to 1 mu m in size. The 3L1B6P ceramic sintered at 625 degrees C shrinkage and the corresponding microwave dielectric properties are dielectric constant epsilon(r) = 6.8, Q x f = 16,900 GHz and negative temperature coefficient of resonant frequency TCF = - 71 ppm/degrees C. More importantly, the 3L1B6P ceramic with ultra-low sintering temperature (625 degrees C) can be co-fired with aluminum electrode, which illustrates it can be applied for the ultra-low temperature co-fired ceramic (ULTCC) application.

• 单位
  桂林理工大学