Ultra-low temperature sintering and temperature stable microwave dielectrics of phase pure AgMgVO4 ceramics

Cheng Liang Huang, Tsung Hsien Hsu

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

The present study systematically invesitgates the formation and microwave dielectric properties of novel AgMgVO4 ceramics fabricated via the solid-state reaction method. The crystal structure of the ceramics is confirmed to be orthorhombic with a space Group of Pnma (62). A high relative density of 96.2% and an excellent combination of microwave dielectric properties with εr of ~14.89, Q×f of ~19,400 GHz, and τf of ~ − 2.71 ppm/°C can be achieved for the ceramic sintered at 630 °C. The dielectric constant is mainly influenced by the relative density (porosity) and dielectric polarizability. The Q×f is controlled by the microstructure, packing fraction, and lattice energy, which are also highly related to the unit-cell volume. A smaller unit-cell volume leads to a high Q×f. Variation of the τf is strongly correlated to the bond valence of the specimen. Furthermore, the ceramic exhibits good chemical compatibility with aluminum electrodes and is demonstrated as a potent substrate for a band-pass filter with a center frequency of 3.5 GHz. These findings show a great promise for ultra-low temperature co-fired ceramic applications at high frequencies.

原文English
頁(從 - 到)3892-3897
頁數6
期刊Journal of the European Ceramic Society
42
發行號9
DOIs
出版狀態Published - 2022 8月

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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