Iron-nickel magnetic powder core and preparation method thereof
By coating the iron-nickel powder and the coating liquid agent in the coating device, the problem of large loss after coating of the existing magnetic powder core is solved, and high-strength and insulating iron-nickel magnetic powder core preparation is achieved, reducing eddy current loss and improving the uniformity of the coating layer.
CN119724804AActive Publication Date: 2025-03-28HUNAN SPECIAL METAL MATERIALS CO LTD
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Patent Information
- Application Number
- CN202411777090.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-12-05
AI Technical Summary
Technical Problem
The existing magnetic powder core has a large loss after coating, resulting in a decrease in superposition characteristics.
Method used
By adopting a new coating device and process, by coating iron-nickel powder and coating liquid agent in the coating device, the contact reaction ratio between the powder and coating agent is increased, and the crystal growth of uncovered powder is reduced, thereby producing an iron-nickel magnetic powder core with high strength and insulating properties.
Benefits of technology
The eddy current loss of the magnetic powder core is reduced, the uniformity and thickness of the coating layer are improved, and the strength and insulation characteristics of the magnetic powder core are enhanced.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses an iron-nickel magnetic powder core and a preparation method thereof, and the method comprises the following steps: step 1, carrying out coating treatment on iron-nickel powder and a coating liquid agent after gas atomization in a coating device to obtain coated iron-nickel powder; step 2, uniformly mixing the coated iron-nickel powder with a preset amount of zinc stearate and kaolin to obtain insulated coated iron-nickel magnetic powder; 3, carrying out compression molding on the insulated coated iron-nickel magnetic powder to obtain a molded iron-nickel magnetic powder core; and 4, the formed iron-nickel magnetic powder core is firstly subjected to heat treatment, cooled and then placed in the impregnation liquid to be soaked for 0.5-2 h so that micropores in the formed iron-nickel magnetic powder core can be filled with the impregnation liquid, then baking is conducted at the temperature of 200-250 DEG C so that the impregnation liquid soaked in the micropores in the iron-nickel magnetic powder core can be cured in the baking process, and the iron-nickel magnetic powder core is obtained. And finally, the target iron-nickel magnetic powder core with high strength and insulativity is obtained. The invention aims to reduce the magnetic core loss after the magnetic powder core is coated.
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