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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......
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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......
-steady decrease and trend constant. Precursor film forms surrounding the wetting tip when wetting temperature is above 1163K. Formation of precursor film is related to the change of triple line... and reactivity. The kinetic relationship of spreading ratio with spreading time was also investigated. Key words: wetting; interfacial reaction; precursor film CLC number: TG113.26; TG139.8 Document......
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......
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......
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......
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is one of the key materials of nickel-hydrogen battery, thereby zirconia separators are prepared by precursor process in which cellulose textiles immersed with zirconium salts are oxidized, infrared spectra show that viscose textile is an excellent precursor for preparing zirconia separator. The dominant factors in immersion are studied, it is revealed that the solution concentration......
Trans. Nonferrous Met. Soc. China 24(2014) 1779-1784 Pyrolysis mechanism of ZrC precursor and fabrication of C/C–ZrC composites by precursor infiltration and pyrolysis Chun-xuan LIU, Jian-xun CHEN...: C/C-ZrC composites were prepared by precursor infiltration and pyrolysis using the organic zirconium as precursor. The conversion mechanisms of the precursors such as the thermal behavior, structural......