Abstract
Herein, the influence of Mo6+ substitution on the crystal structure, microstructures, chemical bond characteristics, vibration characteristics and microwave dielectric properties of ZnMoxW1-xO4(x = 0−0.12) ceramics prepared by a solid-state reaction were investigated. The results show that Mo6+ substitution does not produce secondary phase, the densification temperature decreases from 1100 to 925 ℃, and Q × f values increased from 19605 GHz (x = 0) to 61640 GHz (x = 0.06) at 925 ℃, which resulted from the packing fraction, UtW-O and microstructures. Also, the τf values were optimized to −34 ppm/°C due to changes in the degree of structural order and stability of chemical bonds.AfiW-O, molecular polarizability and porosity first led to an increase in permittivity and decrease thereafter. The ZnMo0.06W0.94O4 ceramics sintered at 925℃ exhibited satisfactory properties (εr = 15.10, Q × f = 61,640 GHz, and τf = -34 ppm/°C), providing a potential candidate for microwave devices.
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