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Preparation method of high-magnetic-conductivity low-temperature-sintering Z-shaped hexagonal ferrite material

A hexagonal ferrite, high magnetic permeability technology, applied in the field of electronic materials, can solve the problems of Z-type hexagonal ferrite structure and composition, low densification, low activity of pre-fired materials, etc., to achieve high magnetic Conductivity, compact structure, and reduction in synthesis temperature

Inactive Publication Date: 2010-12-15
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

Due to the complex structure and composition of Z-type hexagonal ferrite, it is difficult to form a single and stable Z phase when sintered by traditional ceramic technology, which will adversely affect the electromagnetic properties.
In addition, due to the conventional sintering method, the synthesis temperature of the Z phase is 1250-1350°C, so that the activity of the pre-sintered material is low, and the densification degree of the sample is generally not high, and the magnetic permeability of the low-temperature sintered material is generally only about 3-5.

Method used

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  • Preparation method of high-magnetic-conductivity low-temperature-sintering Z-shaped hexagonal ferrite material

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing:

[0024] The microwave sintered Z-type hexagonal ferrite soft magnetic material proposed by the present invention adopts HAMiLab-C1500 microwave sintering furnace for heat treatment of the material, and the material is mainly made by the following six steps:

[0025] Step 1: According to the chemical formula Ba of Z-type hexagonal ferrite 3 Me 2 Fe 24 o 41 (Me=Co 2+ , Zn 2+ , Mg 2+ , Fe 2+ 、Cu 2+ 、Ni 2+ etc.) to calculate the required raw material BaCO 3 , Fe 2 o 3 、Co 3 o 4 and so on. For example, the preparation composition is Ba 3 co 2 Fe 24 o 41 (Co 2 Z) Material 100g, BaCO is required respectively 3 (99.0%) 23.09g, Co 3 o 4 (Co content 73.02%) 6.23g, consider to use steel ball ball mill during ball milling, adopt the formula of iron deficiency 5wt%, then need Fe 2 o 3 (99.46%) 70.68 g. And the preparation composition is Ba 3 (Zn 0.6 co 0.4 ) ...

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Abstract

The invention discloses a preparation method of a high-magnetic-conductivity low-temperature-sintering Z-shaped hexagonal ferrite material, belonging to the field of electronic materials and relating to the obtaining of low-temperature densification sintering and the high magnetic conductivity of a Z-shaped hexagonal ferrite material. The invention induces a high-efficient and energy-saving microwave heating way in the traditional ferrite preparation technique process, efficiently reduces the synthesizing temperature of the hexagonal ferrite and prompts the densification of the sintering process by depending on the activation of microwave on the sintering process, thereby realizing the purpose of improving microcosmic structure and increasing the magnetic conductivity. The prepared high-magnetic-conductivity low-temperature-sintering Z-shaped hexagonal ferrite material can be used for preparing various high-frequency inductances, filters, antennas and microwave absorbing medium based on an LTCC (Low Temperature Co-fired Ceramics) technology.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a preparation technology of a low-temperature sintered Z-type hexagonal ferrite material with high magnetic permeability based on LTCC technology. Background technique [0002] Planar Z-type hexagonal ferrite has a high magnetocrystalline anisotropy field, and has excellent characteristics such as high initial permeability, high quality factor and high cut-off frequency when used in ultra-high frequency bands. The natural resonance frequency is higher than that of spinel Stone ferrite is an order of magnitude higher, and has broad application prospects in the fields of high-frequency inductors, filters, transformers, power dividers, antennas, and microwave absorbers. With the development of surface packaging technology, in order to meet the requirements of miniaturization, high performance and high reliability of high-frequency devices, low-temperature sintering of Z...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 贾利军张怀武钟智勇刘颖力刘保元苏桦李智华唐英明徐磊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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