A low‐permittivity microwave dielectric ceramic BaZnP <sub>2</sub> O <sub>7</sub> and its performance modification
Xiaoqing Chen, Hao Li, Pengcheng Zhang, Houlin Hu, Gongtian Chen, Gaosheng Li
Abstract
Abstract Complex pyrophosphates compounds have attracted much attention as promising candidates for substrate applications. In the work, a low‐permittivity BaZnP 2 O 7 ceramic was synthesized through solid‐state reaction. The pure phase BaZnP 2 O 7 was crystallized in the triclinic P−1 space group. Excellent microwave dielectric properties of the BaZnP 2 O 7 ceramic with ε r = 8.23, Qf = 56170 GHz, and τ f = −28.7 ppm/°C were obtained at 870°C for 4 h. The substitution of Mg 2+ for Zn 2+ was found to have positive effects on grain morphology and dielectric properties. Optimized performance of ε r = 8.21, Qf = 84760 GHz, and τ f = −21.9 ppm/°C was yielded at 900°C for the BaZn 0 . 98 Mg 0.02 P 2 O 7 ceramic. Intrinsic dielectric properties of BaZn 1‐x Mg x P 2 O 7 ceramics were studied via Clausius–Mossotti equation and complex chemical bond theory.