Raman spectra and microwave dielectric properties of Na₅Tm_1 - x(Y_1/3Yb_2/3)_x(MoO₄)₄ ceramics with ultra-low sintering temperature.

ABSTRACT: The Na₅Tm_1 - x(Y_1/3Yb_2/3)_x(MoO₄)₄ ceramics (x=0-0.18) were successfully synthesized via the solid-state reaction method. XRD analysis revealed that they possessed a single-phase tetragonal scheelite structure belonging to the space group I4₁/a(88). SEM analysis demonstrated that the samples sintered at 600 °C exhibited a dense microstructure, with a relative density as high as 94.9% and an average grain size ranging from 2.172 μm to 2.424 μm. The relative density serves as an external factor influencing ε_r and Q×f, while τ_f is related to bond valence. The ionicity of the Tm-O bond, and the lattice energy and bond energy of the Mo-O bond are the intrinsic factors determining ε_r, Q×f

SUBMITTER: Chen YB 

PROVIDER: S-EPMC11850803 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature