Hydrogen storage properties of Titanium and Zirconium alloys containing oxygen atoms

含氧钛锆合金的储氢性能

基本信息

批准号：
60550453
负责人：
KAJITANI Tsuyoshi
金额：
$ 1.22万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550453/
关键词：
Titanium cxide Zirconium oxide <Ti_5Si_3> alloy <Ti_(5=x)Zr_x> Si(x=1-4) alloy <Ti_3Al> alloy occupation sites of hydrogen atoms 最大水素吸蔵量

项目摘要

Crystal structures of <TiO_(0.3)> and <ZrO_(0.4)> and their hydrides (deuterides) were studied by X-ray and neutron diffraction and neutron inelastic scattering techniques. Hydrogen isotopes were found to sit at octahedral sites in the hexagonal <TiO_(0.3)> lattice and also found to sit at tetrahedral sites in the hexagonal <ZrO_(0.4)> lattice. The crystallographic parameters ie. site occupation probabilities atom location parameters, thermal parameters for each atom site and lattice parameters were determined. Rutherford backscattering experiment was proceeded by the use of helium ion beam to confirm the crystallographic informations obtained by the diffraction works. The backscattering data suggested that hydrogen isotopes are located at tetrahedral interstices either in the <TiO_(0.3)> and in the <ZrO_(0.4)> lattices. Discrepancy on the <TiO_(0.3)> may be attributed by the instability of the <TiO_(0.3)> <D(H)_x> (x-0.1) sample and surface damages by the incident ion beam mainly due … More to short range ordering of oxygen atoms. If hydrogen isotopes are located at all available tetrahedral interstices in the <TiO_(0.3)> lattice, the maximum hydrogen absorption limit should become H/Ti=2.0. With the use of Sponge titanium which contains oxygen up to the concentration of 0.1wt%(about 0.3at%), we prepared <Ti_5Si_3> and <Ti_3> Al alloys. Crystal structures of hydrogen or deuterium gas charged <Ti_5> <Si_3> and <Ti_3Al> alloys were analized by the X-ray and neutron diffraction and the neutron inelastic scattering experiments. Hydrogen isotopes were found to sit at octahedral interstices which are surrounded by six titanium atoms in <Ti_5Si_3H(D)_(0.9)> and <Ti_3AlH(D)_(0.8)> . Titanium atoms were gradually substituted by zirconium atoms to enlarge the crystal lattice of <Ti_5Si_3> . The substitution of titanium atoms by zirconium atoms was proceeded for the purpose to increase the hydrogen storage capacity which was originally H/Ti=0.20 under the 760 Torr. or less hydrogen gas pressure. 80% substitution of titanium atoms by zirconium atoms led to slight increase of hydrogen storage capacity from H/Ti=0.20 to H/ <Zr_(0.8)Ti_(0.2)> . Less

通过X射线和中子衍射和中子C散射技术研究了<tio_（0.4）>的晶体结构（氘化）。晶格参数。同位素位于<tio_（0.3）>中的四面体跨界，在<Zro_（0.4））晶格中，主要是由于氧原子的冲击范围而已。在<tio_（0.3）>晶格中，最大氢吸收极限应成为H/Ti = 2.0。 >和<ti_3al>合金通过X射线和中子衍射和中子非弹性散射经验而被分析。 >锆原子的钛原子的含量从H/ Ti = 0.20到H/ <Zr_（0.8）Ti_（0.2）>