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2020 Abstract: The alkaline leaching of arsenic (As2O3) by Na2S, together with its precipitation by Fe2(SO4)3 was studied. Response surface methodology based on central composite design was employed... factors influencing the leaching process. In the precipitation process, more than 99.93% of arsenic from the leaching solution is removed in the form of amorphous ferric arsenate, at pH 4.8 when Fe3......
of ZrO2(Y2O3) spherical nanometer powders via coupling route of water-oil emulsion with homogenous precipitation CHANG Ying, LI Xi-bin, MENG Zhen-qiang, ZHAO Fu-an (State Key Laboratory of Powder... homogenous precipitation, in which xylol was used as the oil phase, span-80 as the surfactant, and an aqueous solution containing zirconium as the water phase. The ZrO2 powders and the precursor......
孔CeO2. 关键词: 介孔氧化铈; 沉淀法; 比表面积 中图分类号: O614.33; TB383 文献标识码: A Synthesis and characterization of mesoporous CeO2 via chemical precipitation method SONG Xiao-lan, JIANG Nan, QU Peng, HE Xi,YANG Hai... with different pore sizes were synthesized by chemical precipitation method with cerium nitrate and ammonium carbonate as raw materials and cetyltrimethyl ammonium bromide(CTAB)as templates. X-ray......
. 关键词:铝酸钠溶液；表面活性剂；强化；晶种分解 中图分类号:TF 821 文献标识码: A Effect of nonionic surfactant on seeded precipitation of sodium aluminate solution PENG Zhi-hong, LIU Yan... on the seeded precipitation rate of sodium aluminate solution, the particle size and morphology of the products were studied. The results show that when the added amount of the nonionic surfactant......
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合金中,对合金起着最大的强化作用. 关键词:1973合金；时效硬化；析出相；析出序列 中图分类号:TG 146.21 文献标志码:A Ageing precipitation and hardening behavior of 1973 high strength andhigh toughness aluminum alloy... laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Changsha 410083,) Abstract: The ageing precipitation and hardening behavior of 1973 high strength and high toughness......
treatment greatly increases the creep rupture strength of the alloy test at 200 ℃ for 100 h. The high temperature aging treatment has completely suppressed precipitation of θ′ phase and the alloy... temperature aging; precipitation 添加微量Ag能够促进铜镁质量比高的Al-Cu-Mg合金析出与基体完全共格的Ω相的形成[1-4],从而提高该......
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Preparation of Fine Spherical Particle Sized Ceria by Precipitation Method with Ammonium Bicarbonate Cui Dali1,Zhang Guocheng1,Zhu Zhaowu1,Zhang Shunli1,Long Zhiqi1 (1.Advanced Materials Co. Ltd., Beijing General Research Institute of Nonferrous Metals, Beijing 100088, China) Abstract:Fine spherical particle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium......
ion equilibrium concentration was observed in digestion process, whereas 35 mg/L lithium ion concentration remained in solution after precipitation time of 9 h. Moreover, equilibrium concentration decreased sharply from digestion of boehmite or diaspore to seed precipitation, about 95% lithium was precipitated into red mud (bauxite residue) and aluminum hydroxide. This study provides a valuable......
