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Preparation of copper nanoparticles by chemical reduction method using potassium borohydride ZHANG Qiu-li(张秋利)1, YANG Zhi-mao(杨志懋)2, DING Bing-jun(丁秉钧)2, LAN Xin-zhe(兰新哲)1, GUO Ying-juan(郭莹娟)1... by chemical reduction method using potassium borohydride as reducing agent. The effects of reactant ratio, concentration of CuSO4, reaction temperature, and dispersant on the size of product and conversion......
High Temperature Chemical Reaction of La2O3 in H3BO3-C System Xu Jingyu1,Wu Wenyuan1,Tu Ganfeng1,Peng Kewu1 (1.School of Material and Metallurgy, Northeastern University, Shenyang 110004, China) Abstract:The high temperature chemical reaction process of La2O3 in H3BO3-C system was studied by means of XRD and TG-DTA. The results showed that dehydration reaction of H3BO3 occurred......
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Preparation of ultrafine nickel powder by wet chemical process CHEN Rui-ying(陈瑞英), ZHOU Kang-gen(周康根) School of Metallurgical Science and Engineering, Central South University, Changsha 410083... with narrow size distribution. Key words: ultrafine nickel powder; chemical reduction; tap density; multiplayer ceramic capacitor 1 Introduction Driven towards smaller size, higher capacitance and lower......
by using sodium carbonate 5kg/t and HSPA 7g/t. The mechanism study shows that there is chemical absorption between HSPA and active Al3+ sites on the surface of the diaspore with carboxyl. At the same time, bridge-bonds of macromolecule are formed by hydrogen bond. Key words: diaspore; bauxite; selective flocculation; flocculant; chemical absorption 由于硅对氧化铝生产的危害很大, 加之铝土矿资源的日趋贫乏, 因此铝土矿的预......
composite surface without catalyst by chemical vapor deposition (CVD) using CH3SiCl3 as precursor. SEM images of the CVD-product reveal that some long nanowires have grown to tens of micrometers with some... is the main mechanism for the CVD-SiC nanowires. Key words: SiC nanowires; C/C composite; chemical vapor deposition; growth mechanism; characterization 1 Introduction Carbon fiber reinforced carbon......
, Ministry of Education, Jilin Normal University, Siping 136000, China Received 17 July 2012; accepted 15 March 2013 Abstract: Y and Cd co-doped ZnO nanopowders were prepared via chemical precipitation method... an intense violet emission in the room temperature PL spectrum, which could be a potential candidate material for optoelectronic applications. Key words: ZnO nanopowders; chemical precipitation; optical......
J. Cent. South Univ. Technol. (2008) 15(s1): 197-201 DOI: 10.1007/s11771-008-345-8 Fabrication of micro carbon pillar by laser-induced chemical vapor deposition ZHOU Jian(周 健)1, LUO Yin-she(罗迎社... power from 0.5 W to 4.5 W and the pressure of the precursor gas from 225×133.3 Pa to 680×133.3 Pa, the experiments of laser induced chemical vapor deposition were proceeded for fabrication of micro......
Influence of Heat Treatment on the Bond Coat Cyclic Oxidation Behaviour in an Air-plasma-sprayed Thermal Barrier Coating System P.C. Patnaik1,B.R. Marple2,W.R. Chen1,X. Wu1 (1.Structures, Materials..., Boucherville, Quebec, Canada, J4B 6Y4) 摘要:It is generally believed that a thermally grown oxide (TGO) layer of alumina provides enhanced protection to the metallic bond coat in thermal barrier coating......
J. Cent. South Univ. (2017) 24: 720-725 DOI: 10.1007/s11771-017-3473-1 Effects of porosity heterogeneity on chemical dissolution-front instability in fluid-saturated rocks ZHAO Chong-bin(赵崇斌)1... characteristics of the porosity field. The main purpose of this work is to investigate the effects of porosity heterogeneity on chemical dissolution front instability in fluid-saturated rocks......
