Soft Magnetic Alloy Composition for Low Coercivity
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Solution Overview
Problem
Current soft magnetic alloys used in power supply circuits face challenges in achieving low coercivity, high saturation magnetic flux density, and a low melting point, which are essential for reducing energy loss and improving efficiency in electronic devices.
Innovation Solution
A soft magnetic alloy with a composition of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d))MaBbPcCd, incorporating auxiliary components like Ti, Mn, and Al, which forms a Fe-based nanocrystalline alloy with a bcc structure, achieving low coercivity, high saturation magnetic flux density, and a low melting point through specific heat treatment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional soft magnetic alloys are used to achieve high saturation magnetic flux density, then magnetic performance is improved, but coercivity increases and energy loss increases
Solution Approach 1:
The patent changes the chemical composition parameters by introducing specific auxiliary components (Ti: 0.001-0.100 wt%, Mn: 0.001-0.150 wt%, Al: 0.001-0.100 wt%) and controlling main component ratios to achieve optimal magnetic properties. This compositional parameter optimization enables simultaneous achievement of high saturation magnetic flux density and low coercivity
Solution Approach 2:
The patent creates a composite soft magnetic alloy system combining Fe-based main components with multiple auxiliary components (Ti, Mn, Al, and others). This composite structure leverages the synergistic effects of different elements to achieve superior magnetic properties that cannot be obtained with single-component alloys
2Quantity of substance
If conventional soft magnetic alloys are used to achieve high saturation magnetic flux density, then magnetic performance is improved, but melting point increases and manufacturing cost increases
Solution Approach 1:
The patent optimizes the compositional parameters by selecting specific elements and their concentrations to achieve the desired balance between magnetic performance and melting point. The controlled addition of auxiliary components allows tuning of both magnetic and thermal properties simultaneously
3Loss of energy
If alloy composition is optimized for low coercivity, then energy loss decreases, but saturation magnetic flux density may decrease
Solution Approach 1:
The patent employs precise parameter optimization by controlling the content ranges of multiple components simultaneously. The specific compositional formula with defined ranges for Fe, auxiliary components, and other elements enables achieving both low coercivity and high saturation magnetic flux density through balanced composition design
Solution Approach 2:
The multi-component composite alloy structure allows different elements to contribute different properties: Fe provides high saturation magnetic flux density, while auxiliary components (Ti, Mn, Al) contribute to reducing coercivity. The synergistic combination resolves the trade-off between these two magnetic parameters
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 alloy exhibits favorable magnetic properties, including low coercivity, high saturation magnetic flux density, and a reduced melting point, leading to improved energy efficiency and reduced manufacturing costs, making it suitable for high-frequency applications.
Implementation Method 1
achieving low coercivity, high saturation magnetic flux density, and a low melting point through specific heat treatment processes
Implementation Method 2
forms a Fe-based nanocrystalline alloy with a bcc structure
Data Source
AI summary
A soft magnetic alloy contains a main component having a composition formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030≤a≤0.100, 0.050≤b≤0.150, 0<c≤0.030, 0<d≤0.030, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.