CAJ | 학술논문

采用非均相形核法,以HCl为酸化剂在TiH_2颗粒发泡剂表面合成了SiO_2包覆层,并进行释氢试验.采用扫描电子显微镜(SEM)和能谱(EDS)对包覆层结构进行了分析,探讨了包覆层延缓释放氢气的机理.结果表明,pH值对发泡剂表面的成膜过程影响较大,当溶液pH值为9.5时SiO_2在TiH_2颗粒表面形成致密的包覆层;制得的发泡剂有效延迟释氢时间可达120s.
채용비균상형핵법,이HCl위산화제재TiH_2과립발포제표면합성료SiO_2포복층,병진행석경시험.채용소묘전자현미경(SEM)화능보(EDS)대포복층결구진행료분석,탐토료포복층연완석방경기적궤리.결과표명,pH치대발포제표면적성막과정영향교대,당용액pH치위9.5시SiO_2재TiH_2과립표면형성치밀적포복층;제득적발포제유효연지석경시간가체120s.
The TiH_2 particles coated with SiO_2 are prepared using heterogeneous nucleation method with acidification HCl.The structure and the forming mechanisms of the layer are researched.At the end,the hyarogen released experiments are also tested.The result shows that the uniform and compact SiO_2 film can be obtained at the pH=9.5,which can delay the hydrogen releasing time up to 120s.