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Title:
PREPARATION METHOD FOR NOVEL SPHERICAL FE-BASED AMORPHOUS ALLOY POWDER AND AMORPHOUS MAGNETIC POWDER CORE
Document Type and Number:
WIPO Patent Application WO/2019/153309
Kind Code:
A1
Abstract:
A preparation method for a novel spherical Fe-based amorphous alloy powder and amorphous magnetic powder core, comprising the following steps: using a gas atomizing method to prepare the spherical Fe-based amorphous alloy powder; screening the spherical Fe-based amorphous alloy powder to obtain an amorphous alloy powder having a target grain size; successively performing passivating and insulation coating on the screened amorphous alloy powder using a passivator, an insulating compound and an adhesive respectively; and performing stress-free annealing treatment after the processed amorphous alloy powder is press formed by a cold-press method. The prepared amorphous magnetic powder core has stable permeability, low iron core loss, excellent anti-direct current offset ability and superior combination properties, and is hopefully to be used as various inductive elements such as filtering, stabilizing and energy storage elements on various switch power modules.

Inventors:
GUO XIONGZHI (CN)
ZHANG YUNFAN (CN)
XIAO QIANG (CN)
XU FANGSHENG (CN)
ZHOU JIN (CN)
LIU HUAN (CN)
HE KAI (CN)
Application Number:
PCT/CN2018/076354
Publication Date:
August 15, 2019
Filing Date:
February 11, 2018
Export Citation:
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Assignee:
POCO HOLDING CO LTD (CN)
International Classes:
H01F1/153
Foreign References:
CN108172359A2018-06-15
CN108010654A2018-05-08
CN105810383A2016-07-27
CN104190945A2014-12-10
CN105185560A2015-12-23
US20160348222A12016-12-01
Attorney, Agent or Firm:
SHENZHEN MINGRIJINDIAN INTELLECTUAL PROPERTY AGENCY FIRM (GENERAL) (CN)
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