Method for producing high permeability mangan zinc ferrite

Abstract

A method for producing high permeability mangan zinc ferrite particularly relates to a method for improving electromagnetic performance and mechanical strength of products by using slaked magnetic powder for replacing the original alumina powder or zirconium oxide powder in a superposition sintering production process of high permeability mangan zinc (Mn-Zn) ferrite products. The method for producing high permeability mangan zinc ferrite includes the following steps: (1) leading high permeability Mn-Zn ferrite grain powder materials and deduster return fine powder during spray granulation production to be conducted with first flashback in a kiln with flashback temperature above 1300 DEG C, and obtaining slaked Mn-Zn ferrite magnetic powder, and (2) scattering the slaked Mn-Zn ferrite magnetic powder among blank products evenly. The slaked Mn-Zn ferrite magnetic powder and the blank products belong to the same species of materials and do not react with each other, and therefore the bonding problem is solved and products with high performance are obtained.

Description

technical field [0001] The invention relates to a production method of high-permeability manganese-zinc ferrite, in particular to a method for replacing the original alumina powder with cooked magnetic powder during the stacking production process of the high-permeability Mn-Zn ferrite product Or zirconia powder, to improve the electromagnetic properties and mechanical strength of products. Background technique [0002] Magnetic materials have penetrated into all aspects of the national economy and have become important basic functional materials in the modern information society and high-tech industries such as computers, communications, and national defense and military industries. The development of magnetic materials has put forward higher performance requirements for magnetic materials. On the other hand, due to the influence of the market economy, the number of raw and auxiliary material manufacturers has continued to increase, and the number of magnetic material manuf...

AI Technical Summary

Problems solved by technology

High magnetic permeability Mn-Zn ferrite must be produced by stack firing process in order to improve the magnetic permeability performance of the product and prevent the Zn component in the product from volatilizing at high temperature during the sintering process. The high magnetic permeability of the existing technology Mn-Zn ferrite products are sprinkled with a layer of powder materials such as alumina or zirconia during the sintering process to prevent the product from bonding during the sintering process. Zn in ferrite undergoes other reactions, resulting in changes in ferrite composition, aggravating the volatilization of Zn on the contact surface of the product, and making it impossible to obtain products with high magnetic permeability. If a layer of alumina or zirconia powder is not sprinkled, the products will bond together inseparable

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