Magnetic Material Composition for Permeability and Moisture Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic materials used in electronic devices face challenges in maintaining both high magnetic permeability and moisture resistance, especially when subjected to environmental tests like the pressure cooker test (PCT test).
Innovation Solution
A composition comprising magnetic particles, a heterocyclic ring-containing compound, an epoxy or oxetane compound, and a dispersant, where the heterocyclic ring-containing compound has specific Hansen solubility parameters for enhanced moisture resistance and magnetic permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If magnetic powder with small particle diameter is used, then degree of integration is improved, but manufacturing precision deteriorates due to difficulty in handling and coating
Solution Approach 1:
The patent optimizes the average particle diameter of magnetic powder to 0.5-5 μm, balancing miniaturization benefits with manufacturing feasibility. This size range enables good flowability and coating uniformity while achieving high degree of integration. The patent also controls particle size distribution to prevent aggregation and ensure consistent coating quality.
Solution Approach 2:
The patent uses different types of magnetic particles (ferrite and alloy) with complementary properties in specific proportions to achieve local optimization. The ferrite particles provide coating stability and oxidation resistance, while alloy particles contribute magnetic performance, creating a locally optimized composite that addresses both manufacturing and performance requirements.
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 composition effectively forms a magnetic material with improved magnetic permeability and moisture resistance, preventing rusting of magnetic particles and maintaining performance under harsh environmental conditions.
Implementation Method 1
a polarity element of a Hansen solubility parameter of the heterocyclic ring-containing compound is 8.0 MPa1/2 or more, and a hydrogen bond element of the Hansen solubility parameter of the heterocyclic ring-containing compound is 10.0 MPa1/2 or less
Data Source
AI summary
A first object of the present invention is to provide a composition with which a magnetic material having excellent magnetic permeability and moisture resistance can be formed. A second object of the present invention is to provide a magnetic material and an electronic component.The composition of the present invention contains magnetic particles, a heterocyclic ring-containing compound, a compound selected from the group consisting of an epoxy compound and an oxetane compound, and a dispersant, in which a polarity element of a Hansen solubility parameter of the heterocyclic ring-containing compound is 8.0 MPa1/2 or more, and a hydrogen bond element of the Hansen solubility parameter of the heterocyclic ring-containing compound is 10.0 MPa1/2 or less.