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 ∼−2.6ppm/°C, a relative permittivity ∼8.6 and a quality factor ∼23,100GHz (at 11.0GHz) 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.
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