2．25Cr1Mo钢在硫化氢溶液中的应力腐蚀开裂研究

本文用楔形张开加载（WOL）预裂纹试样进行了2．25Cr1Mo材料在硫化氢水溶液中的抗应力腐蚀试验,研究了2．25Cr1Mo钢在不同浓度硫化氢溶液中的抗应力腐蚀性能。试验测定了2．25Cr1Mo钢在500ppm,1000ppm H2S溶液下的应力腐蚀临界应力强度因子Ksoc和应力腐蚀裂纹扩展速率da／dt。结果表明,随着H2S浓度的升高,2．25Cr1Mo钢的应力腐蚀临界应力强度因子Ksoc下降,应力腐蚀裂纹扩展速率da／dt增大,抗应力腐蚀的寿命缩短。     

黑龙江鹿鸣钼矿床流体包裹体特征

鹿鸣钼矿床位于小兴安岭-张广才岭成矿带中南部.钼矿体产于二长花岗岩与花岗斑岩的接触带内,钼矿化主要载体为石英脉,呈脉状、网脉状分布于矿体的内部.研究了主要含矿石英脉体中流体包裹体的特征,结果表明:包裹体相态类型主要为气液两相,矿床的成矿温度峰值分别为400,220℃,盐度为19%~144%,成矿压力平均为18MPa,成矿深度为09~28km,成矿流体成分富含CO2,H2O,CH4等多种气态组分,以及Na+,Ca2+,SO2-4,Cl-液态组分;矿床初始流体来源于岩浆热液,成矿后期受大气降水的混入.矿床成因类型应划归为与中酸性侵入岩浆活动有关的中高温斑岩型钼矿床.     

磷钼杂多阴离子/聚1-萘胺修饰电极的电化学性质研究

制备了磷钼杂多阴离子掺杂于聚１－萘胺中的修饰电极,并对其电化学性质作了研究。采用一步修饰法制备的Ｐ２Ｍｏ１８／聚１－ＮＡＰ修饰电极个有良好的稳定性和电化学活性,修饰底液的浓度和酸度、扫描电位范围对电极的稳定性和电化学性质有较大的影响,该修饰电极对酸奶有催化作用。     

分子筛催化合成乳酸异戊酯的研究

用ＨＺＳＭ－５,Ｍｏ／ＨＺＳＭ－５,Ｆｅ／ＨＺＳＭ－５（３８）分子筛催化合成乳酸异戊酯,以Ｍｏ／ＨＺＳＭ－５分子筛的催化性能最好。当Ｍｏ／ＨＺＳＭ－５分子筛催化剂用量为１ｇ／ｍｏｌ乳酸,乳酸与异戊醇的摩尔比为１：１．２,控制反应温度为１５０℃时,乳酸异戊酯的产率可达９３．８％,催化剂可以回收连续多次使用,在６ｈ内产率仍可保持在９３％左右。     

Hydrogen absorption-desorption characteristic of (Ti0.85Zr0.15)1.1Cr1-xMoxMn based alloys with C14 Laves phase

The microstructure and hydrogen absorption-desorption characteristic of (Ti_0.85Zr_0.15)_1.1Cr_1-xMo_xMn (x ?= ?0.05, 0.1, 0.15, 0.2 ?at.%) alloys were investigated. The results showed that the corresponding alloys were determined as a single phase of C14-type Laves structure. With the increase of Mo content, the maximum and reversible hydrogen absorption capacity decreased, the slope factor H_f increased. Among the studied alloys, (Ti_0.85Zr_0.15)_1.1Cr_0.95Mo_0.05Mn had the best overall properties for practical application of hydrogen storage materials. The maximum and reversible hydrogen storage capacity were 1.76 ?wt% and 1.09 ?wt%, the slope factor H_f was 0.51, and its dissociation enthalpy (ΔH_d) and entropy change (ΔS_d) were 23.1 ?kJ ?mol^?1H₂, 93.8J ?K^?1mol^?1H₂ at 303K, respectively. By studying the dissociation pressures of the synthesized metal hydrides, it was found that Mo had a special effect on the dissociation pressure of Ti–Zr–Cr–Mo–Mn alloys. Among the four alloys, (Ti_0.85Zr_0.15)_1.1Cr_0.95Mo_0.05Mn alloy had the largest hydrogen absorption capacity and the fastest hydrogen desorption rate, which can meet the commercialization demand of hydrogen fuel cell hydrogen supply system.