Cr-Binder Dust Core for Magnetic Permeability and Rust Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dust cores face a challenge in maintaining both magnetic characteristics and anti-rust effects, as increasing the Fe content for improved DC superimposition characteristics leads to increased rust and decreased magnetic properties.
Innovation Solution
A dust core comprising a metal magnetic powder with a binding agent containing a Cr element, where the metallic soap is in liquid form at 25°C during mixing, ensuring the Cr element is distributed to inhibit the decrease in magnetic characteristics while enhancing anti-rust properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Fe content is increased to improve DC superimposition characteristics, then the magnetic characteristics are improved, but the anti-rust effect deteriorates
Solution Approach 1:
A Cr-containing binding agent is introduced as an intermediary substance between the metal magnetic powder particles. This binding agent forms a protective layer that mediates between the high-Fe magnetic particles (which need to maintain close contact for good magnetic characteristics) and the rust prevention requirement. The Cr element in the binding agent provides anti-rust protection without requiring increased particle spacing, thus resolving the contradiction between magnetic performance and corrosion resistance.
2Strength
If a binding agent is used to bind metal magnetic particles, then the structural integrity is improved, but the magnetic characteristics deteriorate due to increased particle distance
Solution Approach 1:
The patent changes the chemical composition parameters of the binding agent by incorporating Cr element (with specific content ranges: 0.1-10 wt% Cr relative to total binding agent mass). This parameter change allows the binding agent to maintain adequate adhesion strength while minimizing the spacing between metal magnetic particles. The Cr-containing binding agent achieves optimal balance between binding strength and particle proximity, thereby maintaining both structural integrity and magnetic characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dust core achieves both high magnetic permeability and effective anti-rust properties by minimizing the distance between metal magnetic particles through the use of a Cr-containing binding agent, thereby inhibiting the decrease in magnetic characteristics.
Implementation Method 1
a binding agent that binds the plurality of metal magnetic particles of the metal magnetic powder, wherein the binding agent includes a Cr element
Data Source
AI summary
A dust core includes: a metal magnetic powder including a plurality of metal magnetic particles; and a binding agent that binds the plurality of metal magnetic particles of the metal magnetic powder. The binding agent includes a Cr element.