Effect of Zn 2? substitution for Mg 2? in Li 3 Mg 2 SbO 6 and the impact on the bond characteristics and microwave dielectric properties

被引：12

作者：

Li, Hao ^{[1
]}

Zhang, Pengcheng ^{[1
]}

Chen, Xiaoqing ^{[1
]}

Tang, Bin ^{[2
,3
]}

Yu, Shengquan ^{[4
]}

Lu, Jiwu ^{[1
]}

Zhang, Shuren ^{[2
,3
]}

机构：

[1] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[3] Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu 610054, Peoples R China

[4] China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 832卷

基金：

中国国家自然科学基金;

关键词：

CRYSTAL-STRUCTURE; LATTICE ENERGY; SOLID-SOLUTIONS; CHEMICAL-BONDS; RAMAN-SPECTRA; IONICITY; CERAMICS; MICROSTRUCTURE; SYSTEMS;

D O I：

10.1016/j.jallcom.2020.155043

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, crystal structure, porosity, bond characteristics, Raman spectra and microwave dielectric properties of Li3Mg2-xZnxSbO6 ceramics were investigated. The phase information of salt structure was determined via X-ray diffraction and Rietveld refinement. The dielectric constant and loss of the ceramic under complete densification were obtained by excluding the porosity. Based on P-V-L theoretical calculation, the relationship among bond ionicity, lattice energy, bond energy and microwave dielectric properties was established. Raman spectroscopy analysis shows the vibration of the Bg mode plays a key role in dielectric loss. Excellent microwave dielectric properties at x = 0.02 can be obtained (εr = 8.57, Q × f = 106617 GHz, τf = −9.8 ppm/°C). © 2020 Elsevier B.V.

引用

页数：9

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