Low temperature sintering and microwave dielectric properties of SmAlO3 ceramics

Cheng Liang Huang, Yao Chung Chen

研究成果: Article同行評審

54 引文 斯高帕斯(Scopus)

摘要

The effects of sintering aids on the microstructures and microwave dielectric properties of SmAlO3 ceramics were investigated. CuO and ZnO were selected as sintering aids to lower the sintering temperature of SmAlO3 ceramics. With the additions, the sintering temperature of SmAlO3 can be effectively reduced from 1650 to 1430°C. The crystalline phase exhibited no phase differences at low addition level while Sm4Al2O9 appeared as a second phase as the doping level was over 0.5 wt.%. In spite of the additions, the dielectric constants showed no significant change and ranged 19-21. However, the quality factor Q × f was strongly dependent upon the type and amount of additions. The Q × f values of 51,000 and 41,000 GHz could be obtained at 1430°C with 0.25 wt.% CuO and ZnO additions, respectively. The temperature coefficients depended on the additions and varied from -40 to -65ppm/°C. Results of X-ray diffractions, EDS analysis and scanning electron microscopy were also presented.

原文English
頁(從 - 到)563-574
頁數12
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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