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Deformation behavior of A6063 tube with initial thickness deviation in free hydraulic bulging YANG Lian-fa(杨连发)1, 2, GUO Cheng (郭 成)1, DENG Yang(邓 洋)2 1. School of Mechanical Engineering... 2006 Abstract: Experiment on seamless tubes of aluminum alloy A6063 with initial thickness deviation of 0–20% was conducted through a free hydraulic bulging with tube ends free. The influence of initial......
. The lower free ammonia concentration in the solution is a guarantee to the lower evaporating rate of ammonia. The conditions of malachite Cu2(OH)2CO3 converting to atacamite Cu(OH)1.5Cl0.5 were also... ion, free ligands and other free ions besides H+ and OH-. After substituting the concentration of each ion with the above expression, the variables can be greatly decreased when the thermodynamic......
J. Cent. South Univ. (2015) 22: 413-420 DOI: 10.1007/s11771-016-3086-0 Free vibration analysis of non-homogeneous orthotropic plates resting on Pasternak elastic foundation by Rayleigh-Ritz method... Berlin Heidelberg 2015 Abstract: Free vibration analysis of non-homogeneous orthotropic plates resting on a Pasternak type of elastic foundation is investigated. A set of admissible orthogonal polynomials......
Analysis of free vibration characteristic of steel-concrete composite box-girder considering shear lag and slipZHOU Wang-bao(周旺保)1, JIANG Li-zhong(蒋丽忠)1, 2, YU Zhi-wu(余志武)1, 2(1. School of Civil... decreases. The proposed approach provides theoretical basis for further research of free vibration characteristics of steel-concrete composite box-girder.Key words:steel-concrete composite box-girder......
Effect of transformation pH on performance of nano-scale β-Ni(OH)2 ZHAO Li(赵 力)1, WANG Shou-jun(王守军)2, SHENG Jun(盛 军)1, HAN Xi-jiang(韩喜江)1 1. Department of Applied Chemistry, Harbin Institute... on the performance of nano-scale Ni(OH)2 was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)2 with crystal size of 20-50 nm, and the crystal lattice......
at about 60-90 ℃[11]. So, the formation of the P-containing free radical with P=O and -OH needs higher energy, i.e. the reaction between α-olefin and H3PO2 requires higher initiating temperature...) and didecylphophinic acid (DDPA), were synthesized through free radical addition reaction. The influence of the types of initiator, reation time and reaction temperature on the yield of DAPAs were......
文章编号:1004-0609(2012)04-1142-05 表面包覆Co(OH)2和Er(OH)3的球形Ni(OH)2的高温性能 赫文秀1,安胜利1,张永强1,蒋文全2,孙海峰2,杨 慧2 (1. 内蒙古科技大学 化学与化工学院,包头 014010； 2. 北京有色金属研究总院 分析测试所,北京 100088) 摘 要:利用化学沉淀法在球形Ni(OH)2表面复合包覆Co(OH)2和Er(OH)3,利用XRD,SEM和恒电流充放电技术测试其结构,表面微观形貌和充放电性能.研究不同包覆量对其常温和高温性能的影响,确定最佳包覆比为1%(质量分数).循环伏安测试结果表明:包覆Er(OH)3的球形Ni(OH)2可以有效提高镍正极在高温环境下的析氧副反应电位,从而抑制析氧副反应的发生,最终提高镍电极在高温环境下的充电效率和活性物质利用率. 关键词:球形Ni(OH)2；充放电......
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文章编号: 1004-0609(2004)10-1782-06 固液空间比对粘结式Ni(OH)2电极放电行为的影响 雷 叶1, 杨毅夫1, 2, 何莉萍3, 陈宗璋1, 余 刚1, 李素芳1, 许检红2 (1. 湖南大学 化学化工学院, 长沙 410082; 2. 湖南省神舟科技股份有限公司, 长沙 410004; 3. 湖南大学 机械与汽车工程学院, 长沙 410082) 摘 要: 采用恒电流充放电法, 交流阻抗法, 循环伏安法研究了固液空间比对粘结式Ni(OH)2电极放电行为的影响, 通过扫描电镜(SEM)观察了电极的表面形貌. 结果表明: 在单位面积活性物质载量一定的条件下, 电极较厚, 则活性物质颗粒之间的间隙较多; 随着固液空间比的不断下降, Warburg扩散区的扩散速度加快, 但电极的充电效率降低, 放电容量减少, 活性物质利用率减小, 电荷转移电......
Thermodynamic equilibrium of CaSO4-Ca(OH)2-H2O system PENG Xiao-yu(彭小玉), WANG Yun-yan(王云燕), CHAI Li-yuan(柴立元), SHU Yu-de(舒余德) School of Metallurgical Science and Engineering, Central South...(OH)2-H2O system and its two subsystems at 298.15 K were constructed according to the theory of thermodynamic equilibrium. The interaction characteristics between the solubility of CaSO4(s) and Ca(OH)2......
