Microwave dielectric properties of Ca1-xSrxMgSi2O6 ceramics. Issue 17 (1st December 2020)

• Record Type: Journal Article
• Authors: Cai, Chaoyang; Chen, Xiaoqing; Li, Hao; Xiao, Jing; Zhong, Chaowei; Zhang, Shuren
• Is Part Of: Ceramics international. Volume 46:Issue 17(2020)
• Page Start: 27679
• Page End: 27685
• Publication Date: 2020-12-01
• Subjects: Microwave dielectric ceramics -- Ca1-xSrxMgSi2O6 -- Raman spectra; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.07.265
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The influences of Sr 2+ doping on microwave dielectric properties of Ca1- x Sr x MgSi2 O6 ( x = 0–0.06) ceramics were researched in the work. The intrinsic mechanism responsible for the dielectric properties was explored by the P–V-L theory and Raman spectra. X-ray diffraction revealed that Ca1- x Sr x MgSi2 O6 solid solutions were formed when x = 0.02–0.06. The ε r continually increased with an increasing x value, which was related to the average bond ionicity and dielectric polarizability. The change of Qf was due to the variation in Si–O bond. The τ f was affected by the Ca/Sr–O bond energy. Furthermore, the Ca0·96 Sr0·04 MgSi2 O6 ceramic sintered at 1320 °C possessed optimum dielectric properties ( ε r = 8.17, Qf = 85858 GHz, and τ f = −41.25 ppm/°C).