摘要
通过直接集气法和X射线衍射分析, 研究了TiH2 在空气中加热氧化处理前后的释氢行为。结果表明:经高于450℃空气中加热处理后TiH2 于Ar气氛中释氢, TiH1.97和TiH1.92向TiH1.5转变的相变开始温度有明显的升高趋势, 表明氧化产物对TiH2 有较好的缓释效果; 氧化温度对 TiH2 缓释效果的影响程度明显大于保温时间的影响。TiH2 在氧化过程中随温度和保温时间的变化有明显的颜色变化, 呈灰色→金绿色→金黄色→紫色→蓝色的变化趋势; 颜色的变化不仅表明了氧化产物厚度和相的变化, 而且还表明氧化是一个渐进的过程。
The releasing hydrogen behavior of TiH_2 was studied by collecting gas directly and XRD analysis when TiH_2 was heated in the atmosphere. The results show that TiH_2 releases hydrogen in Ar atmosphere when the heating temperature is above 450℃. The starting temperature of phase change from TiH_(1.97) and TiH_(1.92) to TiH_(1.5) increases obviously, indicating that the oxides can slow the release of H_2 obviously. Furthermore, the effect of heating temperature on the release of H_2 is bigger than that of the heat preservation time. There is an obvious color change from grey to golden green, yellow, purple, and then to blue with the temperature and heat preservation time changing when heating TiH_2 in the atmosphere, which shows the change of thickness of oxide and phase, and presents a gradual oxidation process.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2005年第3期363-367,共5页
The Chinese Journal of Nonferrous Metals
关键词
TiH2
发泡剂
泡沫铝
氧化处理
TiH_2
foaming agent
aluminum foam
oxidation treatment
