硼对金属间化合物Ni_3Fe氢气诱发环境氢脆的影响(英文)

In this paper the tensile properties of both ordered and disordered Ni-24Fe and Ni-24Fe-0.03%B(wt%)alloys in gaseous hydrogen was investigated.The result shows that the ductility of the disordered Ni_3Fe is significantly larger than that of ordered material in gaseous hydrogen.However,the ductility of ordered Ni3Fe doped with 0.03%B is nearly the same as that of disordered one indicating the obvious suppressing effect of boron on the H_2-induced embrittlement.Based on the segregation behavior of boron in Ni_3Al,it is proposed that the suppressing effect of boron in Ni_3Fe on the H_2-induced embrittlement is attributed to the segregation of boron on grain boundaries,thereby reducing the hydrogen diffusivity along the grain boundaries.     

水合物法分离含氢气体混合物的实验研究

利用高压水合物分离装置,在不同的温度、压力及液体流量下,分别测定了H2、CH4二元混合物与水合物促进剂进行水合反应时分离效果随时间的变化.结果表明,温度越低,体系压力越高,液体流量越大,H2浓度增加越快,但较高的压力对分离效果影响较小,过大的液体流量会加大液体夹带量.适宜的条件为:温度5~10℃,压力4.5~5.0 MPa,合适的液体流量应根据实际情况确定.     

狄拉克方程描述的氢原子定态不是算符S·"非汉字符号"的本征态

指出狄拉克理论描述的氢原子定态,具有量子数nj值确定,而l值可以不同的能级简亻并特征.因而这种与能级的精细结构对应的定态不是算符S·^L的本征态.指出电子自旋不是位形空间的轨道角动量的相对论效应.     

氢分子离子HD+的薛定方程的求解方法

从实验室坐标系下的氢分子离子与原子核之间的相互作用,讨论异核和同核氢分子离子HD^＋的薛定谔方程的Born-Oppenheimer近似求解方法和绝热近似求解方法,同时展示四种展开波函数的方法,其中包括Bsplines技术的应用.     

Zn(H_2O)_4(4-PDC)_2的晶体结构和氢键相互作用

合成了锌的配合物Zn(H2 O)4 ( 4 PDC)2 [4 PDC) =4 pyridinecarboxylate],经X 射线表征 ,晶体数据 :分子量为 381 .66,三斜晶系 ,空间群P 1 ,a =0 .6342 1 ( 7)nm ,b =0 .691 79( 5 )nm ,c=0 .92 80 2 ( 8)nm ,α =96.2 2 7( 8)°,β =1 0 4 .979( 7)° , =1 1 2 .872 ( 7)° ,V =35 2 .2 7( 6)cm-3 Z =1 ,Dc =2 .1 95gcm-3 ,T =2 93( 2 ) ,λ =0 .0 71 0 73nm ,μ(MoKa) =1 .797mm-1,R1=0 .0 2 1 9,wR2 =0 .0 62 2 .在该配合物中 ,每个Zn(II)离子是六配位的扭曲四角双锥构型 .X -射线单晶结构分析表明 ,该化合物的羧基O和配位水分子O通过O…H—O氢键在链方向上和链之间形成网状结构 .     

微波促进杂多酸催化双氧水氧化环已酮制备己二酸

本文研究了微波促进杂多酸催化剂催化双氧水氧化环己酮制备己二酸的反应,考察了5种催化剂以及催化剂用量、反应原料、微波辐射功率和辐射时间对己二酸产率的影响.反应的优化条件为：3.5ml环己酮、0.5g钨酸钠、0.5g磺基水杨酸、15ml30%双氧水,在微波辐射功率为400W下反应50min,其产率达72.37%,产物经红外光谱表征.     

Effect of al on behavior of AB5-type metal hydride anodes at elevated temperature

AB₅-type hydrogen storage alloys are the most promising materials used as the anode in commercial Ni-MH secondary battery. It is very important for electrode materials to have a wider operation temperature range. The component Al is the dominant element to control the electrochemical behavior of the AB₅-type alloys at elevated temperature. With the increase of the amount of Al the discharge capacity decreases and the retention of discharge capacity increases with increasing temperature. It is mainly due to the formation of stable and dense surface oxide film Al₂O₃, which inhibits the electrode corrosion and the further oxidation underneath the surface films.