Soft magnetic composite material and preparation method therefor
By preparing ultrafine alloy powder in soft magnetic composite materials and coating and modifying it with specific surface modifiers, the problems of insufficient DC bias performance and quality factor of the materials were solved, and higher performance was achieved.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HANGZHOU XINCHUAN NEW MATERIALS CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-07-23
AI Technical Summary
Existing soft magnetic composite materials have shortcomings in terms of DC bias performance and quality factor, especially the poor thermal stability of organic coating materials and the poor wettability between inorganic coating agents and metal matrices.
Ultrafine alloy powder was prepared by evaporation and condensation. A silica layer was coated on the powder surface with 3-aminopropyltriethoxysilane and tetraethyl orthosilicate. The silica coating was then modified with cyclobutanetetracarboxylic dianhydride and 3-aminobenzophenone, and further modified with N-(3-trimethoxysilylpropyl)ethylenediamine to form a stable insulating layer.
The DC bias performance and quality factor of the soft magnetic composite material were improved, with DC bias performance ranging from 66.7% to 82.8% and quality factor ranging from 63.4% to 96.1, which enhanced the insulation integrity and thermal stability of the material.
Smart Images
Figure CN2025091099_23072026_PF_FP_ABST