Effects of partial substitution at different sites on the microwave dielectric properties of K2Co2(MoO4)3 ceramic and its applications as a 5G/6G antenna array

Zong Ying Li, I. Chun Ling, Tsung Hsien Hsu, Cheng Liang Huang

研究成果: Article同行評審

摘要

Novel K2Co2(MoO4)3 microwave dielectric materials were prepared and investigated for the first time. The effects of substituting Ag+ for K+ and Zn2+ for Co2+ on the ceramic structure, sintering temperature, surface microstructure, and microwave dielectric properties were studied. The X-ray diffraction results showed that the samples had a monoclinic crystal structure and belonged to the P121/c1 (14) space group, with a single-phase composition of K2Co2(MoO4)3. The pure phase K2Co2(MoO4)3 ceramic achieved a Q × f = 42,300 GHz, an ε r = 7.31, and a τf = − 81.3 ppm/°C at a sintering temperature of 630 °C. Partial substitution in the specimen can effectively enhance its densification and reduce the dielectric loss, particularly at the K-site. This improvement is primarily attributed to the more significant variation in the cell volume of the ceramics. The K2Co1.9Zn0.1(MoO4)3 specimen with minute substitution achieved Q × f = 57,300 GHz, ε r = 7.82 and τf = − 69 ppm/°C at 630 °C, while the K1.86Ag0.14Co2(MoO4)3 specimen showed Q × f = 61,200 GHz, ε r = 8.73 and τf = − 68 ppm/°C at 540 °C. The research also exhibited that the material had outstanding chemical compatibility with aluminum electrodes during co-firing. Based on the results, these ceramics show potential as attractive candidates for ULTCC applications, such as an 8 × 8 dual-polarization antenna array used in the millimeter-wave region for 5G/6G systems.

原文English
文章編號2045
期刊Journal of Materials Science: Materials in Electronics
34
發行號30
DOIs
出版狀態Published - 2023 10月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 凝聚態物理學
  • 電氣與電子工程

指紋

深入研究「Effects of partial substitution at different sites on the microwave dielectric properties of K2Co2(MoO4)3 ceramic and its applications as a 5G/6G antenna array」主題。共同形成了獨特的指紋。

引用此