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題 名 | Liquid Phase Sintering and Chemical Inhomogeneity in the BaTiO[feb0]-BaCo[feb0]-LiF System=液相燒結及成份非均勻性 |
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作 者 | 王錫福; 鄭功杰; | 書刊名 | 中國工程學刊 |
卷 期 | 22:1 1999.01[民88.01] |
頁 次 | 頁61-68 |
分類號 | 440.33 |
關鍵詞 | 液相燒結; 鈦酸鋇; 積層電容; Liquid phase sintering; Multilayer ceramic capacitors; Barium titanate; |
語 文 | 英文(English) |
中文摘要 | 積層電容之未來發展方向之一是降低胚體之共燒溫度,本文以鈦酸鋇活加氟化鋰 ,經液相燒結來降低其燒結溫度。由一系列的實驗來探討氟化鋰的添加量及燒結溫度對鈦酸 鋇的緻密化、顯微組織、及介電性質的影響。同時本文亦說明在液相燒結時,由兩種不同機 構,所導致的不同層次成份非均勻性;低溫時,因熔解再沈澱造成有限度的晶粒成長,而形 成晶粒核殼結構,及在較高溫燒結時,由於助熔劑的揮發而引起巨觀性的成份不均勻。 |
英文摘要 | An ongoing goal of multilayer capacitor research is to lower the firing temperature of the dielectric. This paper gives a comprehensive study of sintering BaTiO �� with LiF flux which lowers the firing temperature through liquid phase sintering. A detailed set of experiments is discussed concerning microstructural evolution and corresponding dielectric properties under two processing variables: amount of LiF and sintering temperature. Different scales of chemical inhomogeneity were observed in this system which reflect two underlying mechanisms: solution reprecipitation with limited grain growth at low temperatures. which resulted in distinct core-shell structures, and flux volatility, which gave rise to microscopic chemical inhomogeneity at higher sintering temperatures. |
本系統中英文摘要資訊取自各篇刊載內容。