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中南大学学报(自然科学版)

Journal of Central South University

第28卷    第5期    总第117期    1997年10月

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文章编号:(1997)05-66-4
化学共沉积法制备纳米级Ni/Cu复合粉
柴立元; 钟海云; 闵小波

(中南工业大学有色冶金系; 中南工业大学有色冶金系 长沙; 410083; 长沙)

摘 要: 研究了一种制备超细Ni/Cu包覆型复合粉的新工艺。以硫酸铜和硫酸镍为原料、酒石酸铵为络合剂、NaOH调节pH值、水合肼还原的化学共沉积法,制备了平均粒径为50nm的纳米级镍包铜(Ni/Cu)复合粉末。并从电化学、结晶学的角度阐述了制备粒度微细、包覆均匀的Ni/Cu复合粉末的基本原理。该方法利用液-液均相置换反应,采用温和的反应条件,直接制备纳米级复合粉末材料,具有方法简单、粉末粒度均匀、产品纯度高等优点。 

 

关键字: 化学反应; 共沉积; 纳米; Ni/Cu 复合粉

PREPARATION OF NANOMETER Ni/Cu COMPOSITE POWDER BY CHEMICAL CODEPOSITION
Chai Liyuan Zhong Haiyun Min Xiaobo

Department of Nonferrous Metallurgy,Central South University of Technology,Chnagsha,410083,China

Abstract:A novel technology for preparing nanometer Ni/Cu composite powder has been studied. The aqueous mixture of copper sulfate and nickel sulfate was reduced by hydrazine directly, with ammonium tartrate being complexing agent, NaOH being pH adjuster. Nanometer Ni-coated Cu composite powder with an average size of 50 nm was obtained, under the conditions of ρ(Cu2++Ni2+=80g·L-1, ρ(NH42C4H4O6=50g·L-1, ρNaOH=50g·L-1, φN2H4·H2O=60% and temperature 85℃. Also the principle for preparing ultrafine and well-distributed Ni/Cu composite powder was explained in detail by use of electrochemistry and crystallography. The process has simplicity,and the powder has well-distributed size and high purity. 

 

Key words: chemical reaction; codeposition; nanometer; Ni-coated Cu composite powder

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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