Effect of SiO2 coating layer morphology on TiH2 gas release characteristic.
Effect of SiO2 coating layer morphology on TiH2 gas release characteristic.
复制标题
SiO2涂层形貌对TiH2气体释放特性的影响。
DOI：
10.1016/j.jcis.2005.07.012
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发表时间：
2005
影响因子：
9.9
通讯作者：
B. Ding
中科院分区：
文献类型：
--
作者：
Zhimao Yang;J. Fang;B. Ding
采用溶胶-凝胶法，以廉价的原料在TiH 2颗粒表面制备了均匀致密的SiO2薄膜涂层。详细研究了SiO2包覆TiH 2颗粒的制备过程以及包覆层形貌对气体释放特性的影响。当TiH 2悬浮液的pH值为4.0左右，钛酸浓度大于0.5mol/L时，涂层呈现SiO2颗粒包覆的形貌。当溶液pH值为4.0、草酸浓度为0.5mol/L时，可获得均匀致密的涂膜层。700 °C下的气体释放实验结果表明，包覆SiO2的TiH 2颗粒可有效地将TiH 2粉末的气体释放开始时间延迟到60-100 s。与颗粒包覆层相比，SiO2薄膜包覆层对TiH 2颗粒的气体释放有更好的延缓作用。
In this study, a uniform and compact SiO2film-coating layer was prepared on the surface of TiH2particles by sol–gel method using inexpensive raw materials. The preparation process of SiO2-coated TiH2particles and the effect of the coating layer morphology on the gas release characteristic were investigated in detail. When the pH value of TiH2suspending solution is about 4.0 and the concentration of silicic acid is more than 0.5 mol/L, the coating layer shows a SiO2particle-coating morphology. While a homogeneous and dense film-coating layer can be obtained when the solution pH value and concentration of silicic acid are about 4.0 and 0.5 mol/L. The results of gas release at 700 °C show that TiH2particles coated with silicon dioxide layers can efficiently delay the starting time of gas release of TiH2powders to 60–100 s. Comparing the particle-coating layer, the SiO2film-coating layer has a better delaying effect on gas release of TiH2particles.