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Title:
HIGH-FREQUENCY AND HIGH-IMPEDANCE MANGANESE-ZINC FERRITE MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/021305
Kind Code:
A1
Abstract:
A high-frequency and high-impedance manganese-zinc ferrite material and a preparation method therefor. The following principal components, in terms of oxides, are composed of 48-49.7 mol% of Fe 2O 3, 29-33 mol% of MnO, 19-21 mol% of ZnO, and 0.03-0.08 mol% of Co 2O 3, and the secondary components by weight of the principal component comprise at least three of 0.01-0.05 wt% of Nb 2O 5, 0.02-0.05 wt% of CaCO 3, 0.01-0.08 wt% of SnO 2, 0.01-0.06 wt% of Bi 2O 3, and 0.01-0.05 wt% of MoO 3. The method for preparing the high-frequency and high-impedance manganese-zinc ferrite material comprises the following process steps: compounding, pre-sintering, sanding, granulating, forming and sintering. Compared with the prior art, the present material has excellent characteristics such as a high frequency and a high impedance, a high Curie temperature, and low costs, and can meet the high requirements of electronic equipment for EMI.

Inventors:
ZHANG QIANGYUAN (CN)
XING BINGBING (CN)
SONG YANYAN (CN)
LI XIAOLONG (CN)
CHEN ZHENNING (CN)
ZHANG ZHIXIN (CN)
Application Number:
PCT/CN2020/106160
Publication Date:
February 03, 2022
Filing Date:
July 31, 2020
Export Citation:
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Assignee:
TDG HOLDING CO LTD (CN)
International Classes:
H01F1/34; C04B35/38; H01F41/02
Foreign References:
CN110156451A2019-08-23
CN111233452A2020-06-05
CN110824395A2020-02-21
CN106830913A2017-06-13
JP2008201639A2008-09-04
JP2006303522A2006-11-02
Other References:
YUKUN SUN, DONGYUN LI, PENGZHAO GAO, YANG XU, HONGLIANG GE, CHONG YAN: "Effect of Bi 2 O 3 –MoO 3 –Nb 2 O 5 Addition on Microstructure and Magnetic Properties of Mn–Zn Ferrites with High Permeability", JOURNAL OF THE CHINESE CERAMIC SOCIETY, ZHONGGUO JIANZHU GONGYE CHUBANSHE, BEIJING, CN, vol. 44, no. 9, 30 September 2016 (2016-09-30), CN , pages 1297 - 1301, XP055890688, ISSN: 0454-5648, DOI: 10.14062/j.issn.0454-5648.2016.09.08
Attorney, Agent or Firm:
CHANGZHOU BAIYETENGFEI PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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