Microwave dielectric properties of Bi(Sc_(1/3)Mo_(2/3))O_4 ceramics for LTCC applications

摘要

AbstractA novel microwave dielectric ceramics Bi(Sc1/3Mo2/3)O4with low firing temperature were prepared via the solid reaction method. The specimens have been characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy and DC conductivity. The Bi(Sc1/3Mo2/3)O4ceramics showed B-site ordered Scheelite-type structure with space group C2/c. Raman analysis indicated that prominent bands were attributed to the normal modes of vibration of MoO42−tetrahedra. The dielectric loss of Bi(Sc1/3Mo2/3)O4ceramics can be depended strongly the bulk conductivity by DC measurement. The superior microwave dielectric properties are achieved in the Bi(Sc1/3Mo2/3)O4ceramic sintered at 875 °C/4 h, with dielectric constant ~ 25,Q × f~ 51,716 GHz at 6.4522 GHz and temperature coefficient of resonance frequency ~ − 70.4 ppm/°C. It is a promising microwave dielectric material for low-temperature co-fired ceramics technology.