Results
Title

Structure and microwave dielectric properties of BaAl2−2x(CuSi)xSi2O8 ceramics.

Authors

Yan, Xinkan; Ding, Shihua; Zhang, Yun; Song, Tianxiu; Huang, Long; Zhang, Xiaoyun

Abstract

The sintering behavior, phase composition, microstructure and dielectric properties of BaAl2−2x(CuSi)xSi2O8 (x = 0, 0.01, 0.015, 0.02, 0.04, 0.06, 0.08) ceramics prepared via solid-state reaction route were investigated. Deviation between theoretical and experimental permittivity of BaAl2Si2O8 ceramics was discussed, and the theoretical and experimental temperature coefficient of resonant frequency (τf) was also compared. The results showed that substituting (Cu0.5Si0.5)3 for Al3 in matrix of hexacelsian could lower the sintering temperature from 1400 to 1200 °C and greatly promote the transformation of hexacelsian-to-celsian. And the single celsian phase was obtained for the compositions with x ≥ 0.02. The bulk densities, microstructure and dielectric properties of BaAl2−2x(CuSi)xSi2O8 ceramics were improved by doping a small quantity of (Cu0.5Si0.5)3 ions in the BaAl2Si2O8. The BaAl1.96(CuSi)0.02Si2O8 ceramics sintered at 1300 °C obtained good microwave dielectric properties: εr = 6.7, Q × f = 31,276 GHz, τf = − 17.17 × 10−6 °C−1.

Subjects

SINTERING; DIELECTRIC properties; CERAMICS; MICROWAVES; PERMITTIVITY; MICROSTRUCTURE; MICROWAVE sintering

Publication

Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 3, p2591

ISSN

0957-4522

Publication type

Academic Journal

DOI

10.1007/s10854-019-02798-5