Abstract
Microwave dielectric properties and microstructures of novel high-Q ceramics ZnZrNb2O8 prepared by new sintering method of reaction-sintering method (RS) and conventional solid–state reaction method (CS) have been investigated. The XRD patterns and SEM reveal that both of RS and CS methods present single phase of ZnZrNb2O8 and uniform morphology at their optimal sintering temperature. In order to evaluate the effects of difference sintering methods on the microwave dielectric properties of ZnZrNb2O8 ceramics, the theoretical dielectric constant, packing fraction and bond valence were calculated based on the Rietveld refinement method. The calculation results reveal that the RS method was more beneficial to the microwave dielectric properties of ZnZrNb2O8 ceramics in contrast with CS method. Excellent microwave dielectric properties for ZnZrNb2O8 ceramics with enhanced Q × f value of 76, 400 GHz could be obtained using RS method sintered at 1175 °C for 4 h.
Published Version
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