Size Control of Nickel Powders from Nickel Chloride Solution Containing Ammonia in DEA Solutions
2005; The Korean Powder Metallurgy & Materials Institute; Volume: 12; Issue: 3 Linguagem: Inglês
10.4150/kpmi.2005.12.3.201
ISSN2287-8173
AutoresEun‐Young Choi, Yoon Bok Lee, S. Yoon, Kwang Ho Kim, Jin Chun Kim, Young Mok Rhyim, Hyong Kuk Kim, Young Do Kim,
Tópico(s)Nanomaterials and Printing Technologies
ResumoNickel powders were synthesized by the hydrazine reduction of nickel chloride solution containing ammonia in DEA solutions. The size distribution of nickel powders were investigated as a function of ammonia concentration, hydrazine concentration and the mixed composition ratio of diethanolammine (DEA) and triethanolammine (TEA). Nickel powders with the size in submicron range were obtained at $185^{\circ}C$ for 45 minutes by hydrazine reduction of nickel chloride solution in DEA solutions. The hydrazine concentrations showed significant effects on the particle size and shape distribution of nickel powders under $NH_3/Ni^{2+}$ molar ratio of 2.0 condition. As the mixed volume ratio of TEA and DEA increased, nickel powders with relatively larger particle size and low agglomeration were obtained. Nickel powders with particle size in the ranged from 0.4 to $0.9\;{\mu}m$ were obtained at the 50 $vol.%$ of TEA.
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