Abstract
Low-loss CaMoO4 dielectric ceramics with scheelite structure have been synthesized by a solid-state route. The effects of BaCu(B2O5) (BCB) dopant on the micromorphology, density, and microwave dielectric properties of CaMoO4 ceramic were studied. BCB dopant could effectively reduce the sintering temperature of the ceramic to 875°C, while the dielectric properties decreased only slightly. In particular, 0.75 wt.% BCB-doped CaMoO4 ceramic sintered at 875°C presented good microwave dielectric properties of er = 10.67, Q × f = 84,775 GHz, and τf = − 46.48 ppm/°C. Besides, energy-dispersive x-ray spectroscopy (EDX) line scanning analysis confirmed that the CaMoO4 ceramics exhibited good chemical compatibility with silver electrodes and could thus be applied in low-temperature cofired ceramic (LTCC) technology.
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