Glass-Ceramic-Ferrite Composition for High-Permeability Electronic Components
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Solution Overview
Problem
There is a need for electronic components with high flexural strength, high crack resistance, and high reliability, particularly those capable of effectively managing noise in high-frequency applications, which requires materials with high relative permeability.
Innovation Solution
A glass-ceramic-ferrite composition is developed, comprising a glass, a ferrite, and a ceramic filler, where the glass contains specific proportions of R2O, Al2O3, B2O3, and SiO2, and the ferrite and ceramic filler are adjusted to achieve high flexural strength and relative permeability, suitable for use in electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ferrite content is increased to achieve high relative permeability for high-frequency noise control, then the relative permeability is improved, but the flexural strength deteriorates
Solution Approach 1:
The patent employs a composite material system consisting of glass, ferrite, and ceramic filler (forsterite and quartz). This composite structure allows the material to simultaneously achieve high relative permeability (through ferrite content of 20-80 wt%) and high flexural strength (through glass matrix and forsterite reinforcement), resolving the contradiction between magnetic performance and mechanical strength in high-frequency noise-control components
Solution Approach 2:
The patent optimizes specific compositional parameters: glass composition (SiO2: 60-80 wt%, B2O3: 10-30 wt%, Al2O3: 3-15 wt%), ferrite content (20-80 wt%), and forsterite content (5-30 wt%). By precisely controlling these parameters, the material achieves both high relative permeability for high-frequency applications and sufficient flexural strength, demonstrating parameter optimization to resolve the contradiction
2Strength
If the glass composition is modified to increase flexural strength, then the flexural strength is improved, but the firing temperature requirements increase
Solution Approach 1:
The patent carefully balances glass composition parameters to achieve both high flexural strength and moderate firing temperature. The glass contains SiO2 (60-80 wt%) for strength, B2O3 (10-30 wt%) for lower melting point and flexibility, and Al2O3 (3-15 wt%) for structural stability. This compositional balance allows the material to be fired at 900-1100°C while achieving flexural strength ≥200 MPa, resolving the contradiction between strength and firing temperature
Data Source
AI summary
A glass-ceramic-ferrite composition containing a glass, a ferrite, and a ceramic filler, in which the glass contains, by weight, about 0.5% to about 5.0% R2O (R represents at least one selected from the group consisting of Li, Na, and K), about 5.0% or less Al2O3, about 10.0% to about 25.0% B2O3, and about 70.0% to 85.0% SiO2 with respect to the total weight of the glass, the percentage by weight of the ferrite is about 10% to 80% with respect to the total weight of the composition, the ceramic filler contains at least forsterite selected from forsterite and quartz, the percentage by weight of the forsterite is about 1% to about 10% with respect to the total weight of the composition, and the percentage by weight of the quartz is about 40% or less with respect to the total weight of the composition.