Journal of the American Ceramic Society · 2007 · 123 citations · 13 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMicrowave EngineeringDielectric CeramicsDielectricsElectrical Properties Of CeramicsInorganic MaterialsMicrowave MaterialsSinteringCeramic DielectricsGrain Size ReductionMicrowave Dielectric CeramicsMicrowave Dielectric PropertiesMicrowave SinteringOxide DielectricsSintering BehaviorZinc Oxides
Zn 2 SiO 4 ceramics synthesized by the conventional solid‐state method exhibited a low Q × f value, possibly due to the formation of a ZnO second phase. However, with a small ZnO reduction from the Zn 2 SiO 4 ceramics, the ZnO second phase disappeared and grain growth occurred due to the formation of a Si‐rich liquid phase. Specimens with a large grain size exhibited an improved Q × f value. In particular, the ceramics with nominal composition Zn 1.8 SiO 3.8 sintered at 1300°C exhibited improved microwave dielectric properties of ɛ r =6.6, Q × f =147 000 GHz, and τ f =−22 ppm/°C.
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