Dielectric

Chemistry

Metallurgy

Materials science

Octahedron

Spinel

Chromatography

Optoelectronics

Physics

Crystallography

Crystal structure

Mineralogy

Optics

Diffraction

Raman spectroscopy

Quantum mechanics

Lattice constant

Ceramic

Analytical Chemistry (journal)

Microwave

Journal of the American Ceramic Society

Spinel Zn 1‐ x C u x Ga 2 O 4 ( x = 0‐0.15) ceramics were prepared by the conventional solid‐state method. Only a single phase was indexed in all samples. The continuous lattice contraction of ZnGa 2 O 4 unit cell was caused by Cu 2+ substitution, and the lattice parameter shows a linear correlation with the content of Cu. The refined crystal structure parameters suggest that Cu 2+ preferentially occupies the octahedron site, and the degree of inversion of Zn 1‐ x Cu x Ga 2 O 4 ( x = 0‐0.15) ceramics almost equals to the content of Cu 2+ . The relative intensity of A* 1g mode in Raman spectra confirm that the degree of inversion climbed with the growing content of Cu 2+ . The experimental and theoretical dielectric constant of Zn 1‐ x Cu x Ga 2 O 4 ceramics fit well. Zn 1‐ x Cu x Ga 2 O 4 ( x = 0.01) ceramics sintered at 1400°C for 2 h exhibited good microwave dielectric properties, with ε r = 9.88, Q × f = 131,445 GHz, tan δ = 6.85 × 10 −5 , and τ f = −60 ppm/°C.

Influence of inverse spinel structured CuGa2O4 on microwave dielectric properties of normal spinel ZnGa2O4 ceramics