Effect of (Zn1/3Nb2/3)4+ co-substitution on the microwave dielectric properties of Ce2Zr3(MoO4)9 ceramics

Ce-2[Zr1-x(Zn1/3Nb2/3)(x)](3)(MoO4)(9) (CZ(1-x)(ZN)(x)M) (x = 0.02-0.08) compounds were successfully prepared to scientifically examine the effect of (Zn1/3Nb2/3)(4+) doping on phase composition, microstructures, and properties. The XRD results showed that all compounds formed a pure phase with the space group of R-3c. SEM results indicated that all compounds were compact at 675 degrees C, and the lattice parameters and average grain size decreased with doping. Performance analysis illustrated that epsilon(r) was closely related to the polarizability, and Q center dot f was affected by the lattice energy of the Mo-O bond. The tau(f) was maintained at an excellent level. Far-infrared analysis indicated that the major dielectric contribution to CZ(1-x)(ZN)(x)M ceramics was related to the absorption of phonon oscillation. The optimum properties (epsilon(r) = 10.72, Q center dot f = 59,381 GHz, tau(f) = 11.48 ppm/degrees C) were obtained when x = 0.04.