【摘要】 测定了TiH2在不同温度下的分解曲线,从热力学和动力学的角度对TiH2的分解规律进行了研究,并分析了使用TiH2制备泡沫铝时的应用方式.结果表明:TiH2的分解率随着温度的升高而逐步提高,TiH2的分解过程大致可分为三个阶段.在620~680℃范围内,TiH2在前10 min分解激烈,在10~20 min内TiH2的分解速度变得缓慢,在20 min以后TiH2的分解逐渐趋于停滞.在700~720℃之间,TiH2在前6 min内的分解速度很快,在6~10 min之间分解速度降低,在10 min以后分解反应出现停滞.更多还原

【Abstract】 The decomposition curves of TiH₂ were determined at different temperatures,and how to decompose TiH₂ was studied thermodynamically and kinetically.The way to use TiH₂ as foaming agent to prepare aluminum foam was also discussed.The results showed that the decomposition rate of TiH₂ increases with increasing temperature,and the decomposition process of TiH₂ can be divided into three phases in a certain temperature range.In the range from 620?℃ to 680?℃,the decomposition of TiH₂ is violent for 10min after starting,then the decomposing speed becomes slow during the next 10?min and the decomposition tends to stagnate after 20?min.In the range from 700?℃ to 720?℃,the decomposing speed of TiH₂ becomes very rapid for 6?min after starting,then decelerates during the next 4?min and stagnates later.更多还原