Title:
FERRITE MATERIAL FOR ELECTROMAGNETIC ABSORPTION AND SHIELDING, AND ELECTROMAGNETIC WAVE ABSORBER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/110626
Kind Code:
A1
Abstract:
Provided are a ferrite material for electromagnetic absorption and shielding, and an electromagnetic wave absorber and a preparation method therefor. The ferrite material comprises a main component and an auxiliary component; the main component comprises Fe2O3, ZnO, and MnO; and the auxiliary component comprises CuO, NiO, and Co2O3. The electromagnetic wave absorber is prepared from the ferrite material. The preparation method for the electromagnetic wave absorber comprises: weighing Fe2O3, Mn3O4, and ZnO; mixing said components with CuO, NiO, and Co2O3 for granulating and forming to obtain a blank; and performing thermal insulation and sintering on the blank. Since each component in the main component and the auxiliary component is specifically selected, and the proportion is optimized, the overall performance of the electromagnetic wave absorber is excellent, the magnetic permeability reaches 3500-6000 at 100 KHz, the reflection loss is remarkably reduced, and the frequency range of noise-absorbing electromagnetic waves is widened.
Inventors:
WANG CHAOMING (CN)
WANG KAIWANG (CN)
ZHU YONG (CN)
YAN ZHENGXIN (CN)
LV FEIYU (CN)
WANG KAIWANG (CN)
ZHU YONG (CN)
YAN ZHENGXIN (CN)
LV FEIYU (CN)
Application Number:
PCT/CN2021/089122
Publication Date:
June 02, 2022
Filing Date:
April 23, 2021
Export Citation:
Assignee:
HENGDIAN GROUP DMEGC MAGNETICS CO LTD (CN)
International Classes:
C04B35/26; C04B35/622; H05K9/00
Foreign References:
| CN112390639A | 2021-02-23 | |||
| CN110845228A | 2020-02-28 | |||
| CN110156451A | 2019-08-23 | |||
| CN110824395A | 2020-02-21 | |||
| CN101805173A | 2010-08-18 | |||
| CN104496449A | 2015-04-08 | |||
| CN110128124A | 2019-08-16 | |||
| JPH06325922A | 1994-11-25 | |||
| GB1086205A | 1967-10-04 | |||
| CN110845228A | 2020-02-28 | |||
| CN105272194A | 2016-01-27 | |||
| CN109688780A | 2019-04-26 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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