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, it shows that its form is {[La2(β-ala)6* (H2O)4](ClO4)6*H2O}n, and its purity is 98.86%. The dissolution enthalpy of the reactants and products in 2 mol*L-1 HCl solution (298.15K) was measured by using the isoperibol reaction calorimetry. ΔrHm was calculated by a designed thermochemical cycle of the coordination reaction. From the results and other auxiliary quantities, the standard molar enthalpy......
in lanthanide series. Key words:rare earths; histidine; enthalpy of solution; [全文内容正在添加中] ......
An Advanced Oscillation Mixing Method for Improving the Cooling Uniformity in Quenching Koichi Terasaka1,Satoshi Suda2,Toshiaki Wakabayashi3,Hiromitsu Murakami4,Hideo Yokota5,Hideki Tsuge1,Hiroyuki..., Japan) 摘要:In quenching, the cooling uniformity is most important to diminish distortion occurring on work pieces. As a trial to accomplish uniform cooling, therefore, there exist various mixing......
,最后得到粒径较小的Cu2+.反向滴定时,溶液中抗坏血酸浓度保持高浓度,当将硫酸铜滴加到还原并剂溶液中,铜被还原马上形核,Cu连续生长,保持较快的生长速率,最后获得的铜粉的粒径明显增大. 图3 不同混合方式下制备铜粉的SEM像 Fig. 3 SEM images of samples under different mixing ways 2.3 混合速率对铜...而过饱和浓度还会达到临界过饱和浓度,从而会二次形核和多次形核.这样使形核与生长过程在一起进行,晶核的生长时间不一致,所以形成的铜晶粒大小不一. 图4 不同混合速率下制备铜粉的SEM像 Fig. 4 SEM images of samples under different mixing rates 3 结论 1) 反应体系的pH值决定了反应物相及其形貌.当pH......
Water model experiments of multiphase mixing in the top-blown smelting process of copper concentrateHong-liang Zhao1,2,Pan Yin1,Li-feng Zhang1,2,Sen Wang1,31. School of Metallurgical and Ecological... water experimental model by geometrically scaling down an Isa smelting furnace. The mixing processes at different liquid heights, lance diameters, lance submersion depths, and gas flow rates were......
Thermodynamic properties and mixing thermodynamic parameters of binary homogeneous metallic meltsZHANG ManMetallurgical Engineering School, University of Science and Technology Beijing, Beijing 100083, China摘 要:<正> After the investigation on the thermodynamic properties and mixing thermodynamic parameters of binary homogeneous metallic melts......
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Effect of different mixing ways in palladium/ceria-zirconia/alumina preparation on partial oxidation of methane张青蔚,温静,沈美庆,王军摘 要:The effect of the mixing ways of Ce0.7Zr0.3O2-Al2O3 mixed oxides on the partial oxidations of methane (POM) was investigated over Pd/Ce0.7Zr0.3O2-Al2O3 catalysts, the mixing ways including salt precursor mixing (ATOM......
Effect of different mixing ways in palladium/ceria-zirconia/alumina preparation on partial oxidation of methane WANG Jun1,WEN Jing1,SHEN Meiqing1,ZHANG Qingwei1 (1.Key Laboratory for Green Chemical Technology of State Education Ministry,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China) Abstract:The effect of the mixing ways of Ce0.7Zr0.3O2-Al2O3 mixed......
Numerical investigation of the effect of transitory strand opening on mixing in a multistrand tundishSabin Kumar Mishra1,Pradeep Kumar Jha1,Satish Chandra Sharma1,Satish Kumar Ajmani21. Department...,and consequently,the mean residence time decreases.In the present study,numerical investigation of mixing inside a delta shaped tundish with sloping boundaries was carried out by solving the Navier-Stokes......
