Microwave dielectric properties and microstructures of CuO- and ZnO-doped LaAlO3 ceramics

Cheng Liang Huang, Ruei Jsung Lin, Hui Liang Chen

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

The microwave dielectric properties and the microstructures of 0.25wt.% CuO-doped LaAlO3 ceramics with ZnO additions have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). Tremendous reduction in sintering temperature can be achieved with the addition of sintering aids CuO and ZnO. The ceramic samples show that dielectric constants (εr) of 22-24 and Q × f values of 33,000-57,000 (at 9.7 GHz) can be obtained at low sintering temperatures 1340-1460°C. The temperature coefficient of resonant frequency varies from -24 to -48ppm/°C. At the level of 0.25wt.% CuO and 1wt.% ZnO additions, LaAlO3 ceramics possesses a dielectric constant (εr) of 23.4, a Q × f value of 57,000 (at 9.7GHz) and a τf value of -38ppm/°C at 1400°C for 2h.

原文English
頁(從 - 到)449-457
頁數9
期刊Materials Research Bulletin
37
發行號3
DOIs
出版狀態Published - 2002 3月 1

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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