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Thermodynamic analysis on preparation of fibrous NiO precursor powders with oxalate precipitation process ZHAN Jing(湛 菁), ZHANG Chuan-fu(张传福), LI Tie-jing(李铁晶), WU Jian-hui(邬建辉) (School...-coordinated Ni(NH3)2+n(n=1, 2, …, 6) and the morphology of NiO powder precursor is fibrous; when pH is below 8.0, nickel ion directly reacts with C2O2-4 and the morphology of NiO powder precursor......
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Shape-controlled synthesis of novel precursor for fibrous Ni-Co alloy powders ZHAN Jing1, 2, ZHOU Di-fei1, ZHANG Chuan-fu1 1. School of Metallurgical Science and Engineering, Central South... in the precursor. A fibriform precursor is a complicated ammonia-containing nickel-cobalt oxalate. The uniform shape-controlled fibrous precursor is obtained under the following optimum conditions: ammonia......
and compact fiber into loose and curved fiber with rough surface. Key words: precursor; fibrous nickel powder; precipitation transformation; thermal decomposition 1 Introduction In recent years, nickel... particles. However, the fibrous precursor particles with good dispersion keep fibrous with good dispersion after decomposition, meaning that the final product inherits the morphology of precursor. It can......
on the properties of the final products. ZHAN et al[19] have reported the thermo- dynamic analysis on the preparation of fibrous NiO precursor powders with oxalate precipitation process. But until now... Tie-jing, WU Jian-hui. Thermodynamic analysis on preparation of fibrous NiO precursor powders with oxalate precipitation process [J]. Trans Nonferrous Met Soc China, 2005, 15(4): 926-930. [20] DEAN J......
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THE INFLUENCE OF PRECURSOR VARIABLES ON THE PHASE FORMATION, MICROSTRUCTURE AND TRANSPORT PROPERTY OF Bi-2223/Ag TAPES J.M.Yoo1,J.W.Ko1,C.H.Jiang2,G.W.Qiao2 (1.Materials Engineering Dept., Korea... prepared with spray-died powders, which are of differentparticle sizes and phase assemblages by varying the annealing time in pure oxygen.Longer time annealing degraded the reactivity of precursor......
Preparation of Machinable Y-TZP/LaPO4 Composite Ceramics by Liquid Precursor Infiltration 李秀华1,周振君1,杨正方1,袁启明1 (1.Key Laboratory for High-Temperature Structural Ceramics and Engineering Ceramics Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China) Abstract:A machinable Y-TZP/LaPO4 composite ceramic was prepared by infiltrating LaPO4 liquid precursor into Y......
Preparation of carbon nanotubes by ethanol catalytic combustion technique using nickel salt as catalyst precursor LI Fei(李 飞) 1,2 , ZOU Xiao-ping(邹小平) 1,2, CHENG Jin(程 进)1,2, ZHANG... was employed as substrate, nickel nitrate (Ni(NO3)2) and nickel chloride (NiCl2) as catalyst precursor, and ethanol as carbon source. The cleaned copper substrate was dipped into catalyst precursor......
composites by precursor infiltration and pyrolysis YU Hai-jiao(于海蛟)1, ZHOU Xin-gui(周新贵)1, WANG Hong-lei(王洪磊)1, ZHAO Shuang(赵 爽)1, YANG Jian-gao(羊建高)2, HUANG Ze-lan(黄泽兰)2 (1. College... fiber fabric reinforced silicon carbide (2D-SiC/SiC) composites were molded by stacking method and densified through precursor infiltration and pyrolysis (PIP) process. SiC coating was deposited......