Microwave dielectric properties of ternary molybdate NaSrLn(MoO4)3 (Ln = Nd, Sm) ceramics for LTCC applications

被引：11
作者：
Wei, Xiaoli [1 ]
He, Yinghan [1 ]
Tang, Mulan [1 ]
Yang, Jianhui [1 ]
Wu, You [1 ]
Chen, Xiuli [1 ]
Zhou, Huanfu [1 ]
机构：
[1] Guilin Univ Technol, Sch Mat Sci & Engn, Key Lab Nonferrous Mat & New Proc Technol, Minist Educ, Guilin 541004, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2023年 / 49卷 / 14期
关键词：
Ceramics; Microstructure; Molybdate; LTCC; CRYSTAL-STRUCTURE; BOND-VALENCE; STRUCTURAL CHARACTERISTICS; INFRARED-SPECTRA; CONSTANTS; TAU(F); RAMAN; CA;
D O I：
10.1016/j.ceramint.2023.04.228
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Two kinds of scheelite-structure microwave dielectric ceramics with I41/a space group were prepared by the conventional solid-phase reaction method. The effects of different sintering temperatures on the crystal structure, lattice vibration and microwave dielectric properties of NaSrLn(MoO4)(3) (Ln = Nd, Sm) ceramics were investigated. XRD and Rietveld refinement results show that NaSrLn(MoO4)(3) (Ln = Nd, Sm) ceramics belong to tetragonal scheelite structure with I4(1)/a space group. The lattice vibration mode was analyzed by Raman spectroscopy, and the correlation between the dielectric performances and structure was established. The NaSrLn (MoO4)(3) (Ln = Nd, Sm) ceramics have high density (>97%) and excellent microwave dielectric properties of er = 10.47, Qf = 38951 GHz, Tf = -48.43 ppm/degrees C for NaSrNd(MoO4)(3) sintered at 775 degrees C and epsilon(r) = 9.55, Qf = 41081 GHz, tau(f) = -44.92 ppm/degrees C for NaSrSm(MoO4)(3) sintered at 800 degrees C. In addition, NaSrLn(MoO4)(3) (Ln = Nd, Sm) ceramics have excellent chemical compatibility with Ag electrodes, which means that the ceramic could be used in LTCC microwave devices.
引用
收藏
页码：23864 / 23870
页数：7
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