Title:
FEBP AMORPHOUS SOFT MAGNETIC POWDER AND PREPARATION METHOD FOR MAGNETIC POWDER CORE THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/160433
Kind Code:
A1
Abstract:
Disclosed are an FeBP amorphous soft magnetic powder and a preparation method for a magnetic powder core thereof. The powder is prepared on the basis of a chemical precipitation method, which preparation comprises: fully dissolving ferrous chloride, ammonium chloride, citric acid and sodium hydrogen hypophosphite, then adding sodium hydroxide, dropwise adding an NaBH4 solution after reaction, and separating, washing and drying the reaction product to obtain the FeBP amorphous soft magnetic powder, wherein the particle size of the FeBP amorphous soft magnetic particles is 100 nanometers to 2 micrometers. After the powder is subjected to insulation coating, same is uniformly mixed with an adhesive, and mould pressed and then annealed to form the magnetic powder core. The powder particles prepared by the method of the present invention are more uniform and finer, and have a higher specific surface area and resistivity; and a magnetic material device prepared therefrom has a lower loss and can be applied in a higher frequency range. In addition, the method is simple in terms of process, convenient in terms of operation, low cost, and suitable for large-scale industrial production.
Inventors:
LI WANGCHANG (CN)
XIAO SHIPENG (CN)
CHE SHENGLEI (CN)
YU LIANG (CN)
ZHENG JINGWU (CN)
QIAO LIANG (CN)
YING YAO (CN)
XIAO SHIPENG (CN)
CHE SHENGLEI (CN)
YU LIANG (CN)
ZHENG JINGWU (CN)
QIAO LIANG (CN)
YING YAO (CN)
Application Number:
PCT/CN2021/082236
Publication Date:
August 04, 2022
Filing Date:
March 23, 2021
Export Citation:
Assignee:
UNIV ZHEJIANG TECHNOLOGY (CN)
International Classes:
H01F1/14; B22F9/24; H01F1/147
Foreign References:
| CN103500643A | 2014-01-08 | |||
| CN101710519A | 2010-05-19 | |||
| CN106373694A | 2017-02-01 | |||
| JP2010261065A | 2010-11-18 | |||
| JP2008141011A | 2008-06-19 |
Other References:
"Bio tribune magazine", vol. 24, 1 December 2013, SPRINGER PARIS , Paris , ISSN: 1772-9416, article CHENG YAO: "Chemical Preparation and Microwave Absorbing Properties of Low-dimensional Fe-based Soft Magnetic Materials and Their Composites", pages: 1 - 133, XP055953513, DOI: 10.1007/BF03010318
"Master Thesis", 1 June 2010, NORTHEASTERN UNIVERSITY, CN, article LUYING WANG: "Field-induced Preparation of Fe-B-P Amorphous Submicron Rods and Their Magnetic Properties", pages: 1 - 80, XP055953519
"Master Thesis", 1 June 2010, NORTHEASTERN UNIVERSITY, CN, article LUYING WANG: "Field-induced Preparation of Fe-B-P Amorphous Submicron Rods and Their Magnetic Properties", pages: 1 - 80, XP055953519
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE CO., LTD. (CN)
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