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

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...

AI Technical Summary

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.

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