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題 名 | θ至α-Al[feaf]O[feb0]相轉換的熱差行為特性分析=Characterization of Differential Thermal Analysis Profiles for θ-to α-Al[feaf]O[feb0]Phase Transformation |
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作 者 | 陳詩婷; 許宇嬋; 顏富士; | 書刊名 | 陶業學刊 |
卷 期 | 3:1 1999.01[民88.01] |
頁 次 | 頁25-34 |
分類號 | 440.33 |
關鍵詞 | 氧化鋁; 相轉換; 臨界粒徑; 孕核成長; Alumina; Phase transformation; Nucleation and growth; Critical size; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究整理θ至α-A1�烙�鬲衕鉥姘L程中,熱差分析(DTA)曲線的特徵,重點在加α-A1�烙�偌劃堜珩ㄔ耵漁釋部C由初步數據顯示:其轉換機構係與孕核的臨界粒徑有關。晶粒的成長則與α-A1�烙�乾硒僎〞獄E合有關。加晶種的功能適足以促成孕核及成長時所需θ-A1�烙�做眼馱峉-A1�烙�乾硒鼓獄E合成長的速度,前者關係其達成臨界粒徑;後者則關係α-A1�烙�偽臕朽僕阞犒F成。而影響其成效的因素包括:1.θ-A1�烙�偌僕氻j小,2.加入α-A1�烙�偌劃媔q的多寡,3.加入α-A1�烙�偌劃堛煽僕氻j小,4.不純成分的加入等。 |
英文摘要 | Effects of adding α-A1�烙�� seeds on the characteristics of DTA curves during θ→α-A1�烙�� phase transformation was investigated in this study. It is found that the mechanism of phase transformation was related to the critical size of α-A1�烙�� nuclei and the crystal growth was related to the coal escence of the α-A1�烙�� nuclei to the primary crystallite size, r . Coalescing rate is accelerated by the addition of α-A1�烙�� seeds. The effects are influenced by:1. the particle size of θ-A1�烙��, 2. the weight percent of adding α-A1�烙�� seeds, 3. the size of the seeds, and 4. the impurities resent. |
本系統中英文摘要資訊取自各篇刊載內容。