Abstract
Here, a low-loss and low sintering temperature Zn3-xCux (VO4)2 (ZCuVO) (x = 0.06) ceramic with two phases has been developed. The addition of Cu2+ induced the Zn3(VO4)2 (ZVO) ceramic to catalyze a small amount of the Zn2V2O7 phase. The macroscopic manifestations of weight loss and heat flow reveal the sintering behavior of ZCuVO ceramics. Final formation and densification of ZCuVO ceramics in the range of 700–825 °C. The addition of trace amounts of Cu2+ promoted the critical melt-state of grains, the improvement of the density, the change of the molecular polarization, and the degree of structural ordering, which ultimately manifested itself in the further enhancement of the microwave dielectric properties. The results show that a moderate amount of Cu2+ substitution can modulate εr, improve the Q×f value, and increase the τf value. The ZCuVO (x = 0.06) ceramic sintered at 775 °C showed excellent performance (εr = 12.62, Q×f = 38798.56 GHz, and τf = −69.29 ppm/°C). This study shows that this ceramic has good potential for LTCC applications and provides a reference for the critical melting state of the grains to enhance microwave dielectric properties.
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