Title:
SPHERICAL ULTRAFINE NICKEL POWDER WITH HIGH TAP DENSITY AND ITS WET PROCESSES PREPARING MOTHOD
Document Type and Number:
WIPO Patent Application WO/2006/069513
Kind Code:
A1
Abstract:
The present invention provides a wet processes preparing method of spherical ultrafine nickel powder with high tap density. The method is comprised of using nickel sulfate to react with mixed solution of sodium hydroxide and sodium carbonate to generate nickel hydroxide and basic nickel salt, adding polyhydric alcohol as appearance controlling agent, adding yttrium salt as crystal nucleus forming agent, and using hydrazine or hydrazine hydrate as reducer in order to producing excellent spherical nickel powder with high tap density, narrow grain size distributing, strong resistoxidation, good dispersivity, and mean grain size 0.2-lµm.The invention increases the tap density of nickel powder prapared by wet processes and decreases environment pollution and production cost greatly. Nickel powder prepared by the invention is used to microelectronics laminated ceramic capacitor, powder metallurgy, magnetic material and so on.
Inventors:
HE GUODUAN (CN)
Application Number:
PCT/CN2005/001861
Publication Date:
July 06, 2006
Filing Date:
November 07, 2005
Export Citation:
Assignee:
CHENGDU CHEMPHYS CHEMICAL INDU (CN)
HE GUODUAN (CN)
HE GUODUAN (CN)
International Classes:
B22F9/24; B22F1/054
Foreign References:
| US20030164065A1 | 2003-09-04 | |||
| JP2004060002A | 2004-02-26 | |||
| JP2000087121A | 2000-03-28 |
Other References:
LIAO R. ET AL.: "Preparation of Ultrafine and Spherical Nickel Powders by Aqueous Reducing Method", CHINESE JOURNAL OF INORGANIC CHEMISTRY, vol. 19, no. 10, October 2003 (2003-10-01), NANJI, CHINA, pages 1047 - 1052
LIAO R. ET AL.: "Study on the Preparation of Spherical Nickel Powders of High Tap Density", ELECTRONIC COMPONENTS & MATERIALS, vol. 22, no. 3, March 2003 (2003-03-01), CHENGDU, CHINA, pages 28 - 30, AND 34
LIAO R. ET AL.: "Study on the Preparation of Spherical Nickel Powders of High Tap Density", ELECTRONIC COMPONENTS & MATERIALS, vol. 22, no. 3, March 2003 (2003-03-01), CHENGDU, CHINA, pages 28 - 30, AND 34
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (Bldg. B Tsinghua Tongfang Hi-Tech Plaza, No.1,
Wangzhuang Rd, Haidian District Beijing 3, CN)
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