稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
48-51
,共4页
王跃忠%卢铁城%喻寅%齐建起%文劲松%王海平%肖磊%阳志林%于健%温雅%魏念
王躍忠%盧鐵城%喻寅%齊建起%文勁鬆%王海平%肖磊%暘誌林%于健%溫雅%魏唸
왕약충%로철성%유인%제건기%문경송%왕해평%초뢰%양지림%우건%온아%위념
氮氧化铝%透明陶瓷粉体%铝热还原%热力学
氮氧化鋁%透明陶瓷粉體%鋁熱還原%熱力學
담양화려%투명도자분체%려열환원%열역학
aluminum oxynitride%transparent ceramic powder%aluminothermic reduction%thermodynamic
以微米级的Al粉和纳米级Al_2O_3粉为原料, 在N_2气氛下,通过铝热还原法,进行了AlON粉体的合成.实验表明,在1873～1923 K之间,AlON相开始形成,到2023 K时得到纯相AlON粉体.通过拟抛物线规则计算得到AlON的摩尔生成吉布斯能, 进而算得AlON相形成的转变温度为1887 K.热力学分析表明,铝热还原法合成AlON过程中,各物相易受气氛、温度的影响而表现出不同的热力学行为,进而影响合成的纯相AlON的固溶组分.实验结果与理论计算分析相符合.
以微米級的Al粉和納米級Al_2O_3粉為原料, 在N_2氣氛下,通過鋁熱還原法,進行瞭AlON粉體的閤成.實驗錶明,在1873～1923 K之間,AlON相開始形成,到2023 K時得到純相AlON粉體.通過擬拋物線規則計算得到AlON的摩爾生成吉佈斯能, 進而算得AlON相形成的轉變溫度為1887 K.熱力學分析錶明,鋁熱還原法閤成AlON過程中,各物相易受氣氛、溫度的影響而錶現齣不同的熱力學行為,進而影響閤成的純相AlON的固溶組分.實驗結果與理論計算分析相符閤.
이미미급적Al분화납미급Al_2O_3분위원료, 재N_2기분하,통과려열환원법,진행료AlON분체적합성.실험표명,재1873～1923 K지간,AlON상개시형성,도2023 K시득도순상AlON분체.통과의포물선규칙계산득도AlON적마이생성길포사능, 진이산득AlON상형성적전변온도위1887 K.열역학분석표명,려열환원법합성AlON과정중,각물상역수기분、온도적영향이표현출불동적열역학행위,진이영향합성적순상AlON적고용조분.실험결과여이론계산분석상부합.
Micro-sized Al powder and nano-sized alumina powder were employed as starting materials, milled together and then calcined in nitrogen atmosphere to synthesize ALON powder by aluminothermic reduction method. The course of AlON synthesis was investigated. The results show that AlON phase was formed at the temperature range of 1873～1923 K. Single phase AlON powder was fabricated at 2023 K for 2 h in nitrogen. Gibbs energy of AlON was calculated by a thermodynamic quasi-parabola rule. Consequently, the conversion temperature of AlON phase formation was determined as 1887K. According to the thermodynamic analysis, it was concluded that under the effect of temperature and atmosphere, each phase exhibited different thermodynamic behavior in the process of AlON synthesis, which would change the eutectic composition of the resulted single phase AlON powder. The theories coincided with the experimental results in this paper.
