Two-Component Microwave Ferrite Composition for Low-Field Devices
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Solution Overview
Problem
Existing microwave ferrite materials are unsuitable for low-field applications due to high saturation magnetic moments, large linewidths, and high dielectric losses, which limit their performance and reliability in miniaturized microwave communication devices.
Innovation Solution
A two-component microwave ferrite material with a specific composition and preparation method, incorporating elements like Y, Ca, Fe, V, Zr, Gd, and Mn, is developed to achieve a low saturation magnetic moment, small ferromagnetic resonance linewidth, and high Curie temperature, improving stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional microwave ferrite materials are used, then high saturation magnetic moment is achieved, but the material is unsuitable for low-field applications and has large linewidth and high dielectric loss
Solution Approach 1:
The patent applies parameter changes by precisely controlling the doping amounts of multiple elements (V: 0.1-0.5, Zr: 0.1-0.5, Sn: 0.1-0.5, Mn: 0.05-0.2, Al: 0.1-0.5) to achieve the desired saturation magnetic moment range (1000-1260 Gs) and linewidth (≤18 Oe), transforming the material properties to suit low-field applications
Solution Approach 2:
The patent creates a composite ferrite material system Y3-2a-c-d-eCa2a+c+d+eFe5-a-b-c-d-eV aAlbZrcSndMneO12 by combining multiple dopant elements (V, Zr, Sn, Mn, Al) with the base Y-Ca-Fe ferrite structure, achieving synergistic effects that simultaneously optimize saturation magnetic moment, linewidth, and dielectric loss for low-field microwave applications
2Reliability
If high pre-sintering temperature and high sintering temperature are used, then microwave ferrite material with ultra-low loss and small linewidth is achieved, but production cost increases and environmental protection is unfavorable
Solution Approach 1:
The patent optimizes the sintering temperature parameter to 1200-1500°C and pre-sintering temperature to 1000-1300°C, balancing the achievement of low dielectric loss (≤5.4×10−4) and small linewidth (≤18 Oe) with energy consumption and production feasibility, avoiding excessively high temperatures while maintaining material performance
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 resulting material exhibits a ferromagnetic resonance linewidth ≤18 Oe, saturation magnetic moment ≤1260 Gs, dielectric loss ≤5.4×10−4, and Curie temperature ≥260°C, enhancing the stability and reliability of microwave ferrite materials for expanded application in miniaturized communication devices.
Implementation Method 1
a ferromagnetic resonance linewidth ΔH≤18 Oe
Implementation Method 2
two-component microwave ferrite material
Implementation Method 3
a dielectric loss tgδe≤5.4×10−4
Data Source
AI summary
A two-component microwave ferrite material, a preparation method therefor and an application thereof. The two-component microwave ferrite material comprises a first microwave ferrite material and a second microwave ferrite material. The preparation method comprises the following steps: (1) mixing a first microwave ferrite material and a second microwave ferrite material according to a formula amount, and then performing wet ball milling to obtain a ball abrasive; (2) drying the ball abrasive, sieving, and granulating; and (3) sequentially forming and sintering the granulated particles obtained in step (2) to obtain a two-component microwave ferrite material.