Infrared reflectivity spectra, complex chemical bond and microwave dielectric properties of Ce2[Zr1–x(Al1/2Sb1/2)x]3(MoO4)9 (0.02≤x≤0.10) ceramics

Ce2[Zr1–x(Al1/2Sb1/2)x]3(MoO4)9 (CZ1–x(AS)xM) (0.02 ≤ x ≤ 0.10) ceramics were prepared via a solid-state reaction route, and their microstructure was investigated using scanning electron microscopy. A single phase, belonging to the space group of R 3 ‾ c , was confirmed by X-ray diffraction patterns. On the basis of the Rietveld refinement results, the chemical bond ionicity, lattice energy and bond valence were calculated. The intrinsic dielectric constants and losses were evaluated by Far-infrared reflectivity spectroscopy. Optimal microwave dielectric properties: er = 10.12, Q×f = 82,382 GHz and τf = −14.01 ppm/°C were obtained for Ce2[Zr0.98(Al1/2Sb1/2)0.02]3(MoO4)9 ceramics sintered at 850 °C for 4 h.