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    題名: Improvement on the characteristic of Ba2Ti9O20 microwave dielectric materials prepared by modified co-precipitation method
    作者: 朱立文;Chu, Li-Wen;Hsiue, Ging-Ho;林諭男;Lin, I-nan
    貢獻者: 淡江大學物理學系
    關鍵詞: Powder-chemical preparation;Calcination;Ba2Ti9O20;Dielectric properties
    日期: 2006
    上傳時間: 2009-12-31 10:35:39 (UTC+8)
    出版者: Elsevier
    摘要: Modified co-precipitation process (MCP), which combines the automatic pH value control system and supersonic spraying of co-precipitants, was used to synthesize nano-sized Ba2Ti9O20 precursors (48.8 nm). Kinetics for crystallization process is markedly enhanced when the O2 atmosphere was used to replace for air atmosphere in the calcinations and sintering processes. High-density Ba2Ti9O20 materials (>94% T.D.), possessing good microwave properties (K = 38.7 and Q × f = 30,502 GHz), can be obtained by sintering the sample at 1200 °C for 4 h in O2 atmosphere, which is lower than the sintering temperature needed when the materials were processed in air or N2 atmosphere (i.e., 1250 °C for 4 h).
    關聯: Journal of the European Ceramic Society 26(10-11), pp.2081-2085
    DOI: 10.1016/j.jeurceramsoc.2005.09.100
    顯示於類別:[物理學系暨研究所] 期刊論文

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