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 (2016) 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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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:	Dr Jibran Khaliq
Date Deposited:	02 Oct 2017 10:33
Last Modified:	11 Oct 2019 14:31
URI:	http://nrl.northumbria.ac.uk/id/eprint/32138

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