Li4WO5: A temperature stable low-firing microwave dielectric ceramic with rock salt structure

Li, Jie, Fang, Liang, Luo, Hao, Khaliq, Jibran, Tang, Ying and Li, Chunchun (2015) Li4WO5: A temperature stable low-firing microwave dielectric ceramic with rock salt structure. Journal of the European Ceramic Society, 36 (1). 243 - 246. ISSN 0955-2219

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

A Li4WO5 ceramic with rock salt structure was prepared by the solid-state reaction method and its microwave dielectric properties was demonstrated for the first time. It could be well densified at relatively low sintering temperature (∼890 °C). XRD and DTA analysis revealed a phase transformation from cubic to orthorhombic occured at 700 °C. Excellent microwave dielectric properties with a near-zero temperature coefficient of resonant frequency ∼−2.6 ppm/°C, a relative permittivity ∼8.6 and a quality factor ∼23,100 GHz (at 11.0 GHz) was obtained. Li4WO5 was found to be chemically compatible with silver powders when sintered at 890 °C. All the results indicate that the Li4WO5 ceramic is a promising candidate as a base material in low temperature cofired ceramic technology.

Item Type: Article
Uncontrolled Keywords: Micorowave dielectric properties, LTCC, Rock salt, Li4WO5
Subjects: F100 Chemistry
F200 Materials Science
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Jibran Khaliq
Date Deposited: 02 Oct 2017 10:33
Last Modified: 02 Oct 2017 10:33
URI: http://nrl.northumbria.ac.uk/id/eprint/32138

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