Preparation, crystal structure, and dielectric characterization of Li2W2O7 ceramic at RF and microwave frequency range

Jinwu Chen; Chunchun Li; Dan Wang; Huaicheng Xiang; Liang Fang

doi:10.1142/S2010135X17200016

Journal of Advanced Dielectrics (Feb 2017)

Preparation, crystal structure, and dielectric characterization of Li2W2O7 ceramic at RF and microwave frequency range

Jinwu Chen,
Chunchun Li,
Dan Wang,
Huaicheng Xiang,
Liang Fang

Affiliations

Jinwu Chen: State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology Guilin 541004, P. R. China
Chunchun Li: State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology Guilin 541004, P. R. China
Dan Wang: State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology Guilin 541004, P. R. China
Huaicheng Xiang: State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology Guilin 541004, P. R. China
Liang Fang: State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology Guilin 541004, P. R. China

DOI: https://doi.org/10.1142/S2010135X17200016
Journal volume & issue: Vol. 7, no. 1
pp. 1720001-1 – 1720001-5

Abstract

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Single phase Li2W2O7 with anorthic structure was prepared by the conventional solid-state reaction method at 550∘C and the anorthic structure was stable up to 660∘C. The dielectric properties at radio frequency (RF) and microwave frequency range were characterized. The sample sintered at 640∘C exhibited the optimum microwave dielectric properties with a relative permittivity of 12.2, a quality factor value of 17,700GHz (at 9.8GHz), and a temperature coefficient of the resonant frequency of −232ppm/∘C as well as a high relative density ∼94.1%. Chemical compatibility measurement indicated Li2W2O7 did not react with aluminum electrodes when sintered at 640∘C for 4h.

Published in Journal of Advanced Dielectrics

ISSN: 2010-135X (Print); 2010-1368 (Online)
Publisher: World Scientific Publishing
Country of publisher: Singapore
LCC subjects: Science: Physics: Electricity and magnetism: Electricity
Website: http://www.worldscientific.com/worldscinet/jad

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