Low-loss YIG material and preparation method thereof

A low-loss, material-structured technology, applied in the field of electronic ceramic materials, can solve the problems of high dielectric loss, high raw material cost, and large ferromagnetic resonance line width, and achieve the effect of reducing dielectric loss
CN114644516APending Publication Date: 2022-06-21UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2022-06-21

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Abstract

The invention provides a low-loss YIG material and a preparation method thereof, the structural formula of the material is Y2. 7Ca0. 3Fe (4.7-x) Sn0. 3O12, and x is greater than or equal to 0 and less than or equal to 0.325. The preparation method comprises the following steps: (1) preparation of a pre-sintered material; (2) secondary ball milling; and (3) forming and sintering: 1. Sn4 + ions are adopted to replace octahedral Fe < 3 + > so as to reduce the anisotropic constant and ferromagnetic resonance line width; meanwhile, a gradient is set for the iron deficiency amount, so that electron transfer between iron ions between an octahedron (a-site) and a tetrahedron (d-site) is reduced, and the dielectric loss of the material is reduced. The ferromagnetic resonance line width of the low-cost sample is 127Oe, the dielectric constant is 15.6, and the dielectric loss tangent is 4 * 10 <-4 >. According to the invention, octahedral Fe < 3 + > ions are replaced by Sn < 4 + > ions, the molecular magnetic moment of the ferrite material is increased, and the saturation magnetization of the obtained YIG sample is 1865Gs.
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Description

technical field

[0001] The invention belongs to the technical field of electronic ceramic materials, and in particular relates to a YIG ferrite material with low dielectric loss, narrow ferromagnetic resonance line width and high saturation magnetization and a preparation method thereof. Background technique

[0002] During the period of microwave ferrite, it was widely used in the fields of radar, microwave communication, artificial satellite and medical equipment. With the development of electronic systems towards miniaturization, multi-function, and high frequency, garnet-type microwave ferrite materials have narrow ferromagnetic resonance linewidths, low dielectric losses and small magnetic crystals. Excellent properties such as anisotropy currently occupy a dominant position in the application of microwave ferrite devices.

[0003] Research reports about YIG ferrite materials: Patent application with publication number CN 102976740 A discloses a method for manufacturin...

Claims

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