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MnZn ferrite material with low temperature coefficient and low loss at high frequency and preparation method thereof

A low temperature coefficient, ferrite material technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problems of increasing the cost and high price of MnZn ferrite materials, achieve excellent electromagnetic properties, and help reduce The effect of falling, low temperature coefficient

Active Publication Date: 2021-03-12
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of nickel, this method also increases the cost of MnZn ferrite materials while reducing high-frequency losses

Method used

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  • MnZn ferrite material with low temperature coefficient and low loss at high frequency and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A MnZn ferrite material with low temperature coefficient and low loss at high frequency is made of main component, first auxiliary component and second auxiliary component, and its preparation process is as follows:

[0031] (1) Ingredients: mix the main component, the first auxiliary component and the second auxiliary component to obtain a mixed material, wherein,

[0032] The main components are: Fe 2 o 3 : 5.5mol, ZnO: 0.6mol, MnO: 3.9mol;

[0033] Based on the main component, the first auxiliary component is: CaO: 1000ppm, Nb 2 o 5 : 0.04ppm, ZrO 2 : 0.04ppm, V 2 o 5 : 400ppm, Bi 2 o 3 : 800ppm;

[0034] Based on the main component: the second auxiliary component is: MoO 3 : 200ppm, Co 2 o 3 : 1000ppm and TiO 2 : 1000ppm;

[0035] (2) One-time sanding: sand the mixed material in a sand mill, the mass ratio of sanding material, balls and water is 1:1:0.6, the sanding time is 3 hours, and the average particle size after sanding is 1.0 μm;

[0036] (3) Low...

Embodiment 2

[0041] A kind of MnZn ferrite material with low temperature coefficient and low loss when high frequency, compared with embodiment 1, the difference is that in the batching of step (1):

[0042] The main components are: Fe 2 o 3 : 5.4mol, ZnO: 0.8mol, MnO 3.8mol;

[0043] Based on the main components, the first auxiliary components are: CaO: 300ppm, Nb 2 o 5 : 0.01ppm, ZrO 2 : 0.01ppm, V 2 o 5 : 300ppm, Bi 2 o 3 : 1000ppm;

[0044] Based on the main component: the second auxiliary component is: MoO 3 : 400ppm, Co 2 o 3 : 300ppm and TiO 2 : 100ppm.

Embodiment 3

[0046] A kind of MnZn ferrite material with low temperature coefficient and low loss when high frequency, compared with embodiment 1, the difference is that in the batching of step (1):

[0047] The main components are: Fe 2 o 3 : 5.7mol, ZnO: 0.5mol, MnO: 3.8mol;

[0048] Based on the main components, the first auxiliary components are: CaO: 1200ppm, Nb 2 o 5 : 0.04ppm, ZrO 2 : 0.06ppm, V 2 o 5 : 500ppm, Bi 2 o 3 : 300ppm;

[0049] Based on the main component: the second auxiliary component is: MoO 3 : 800ppm, Co 2 o 3 : 2000ppm and TiO 2 : 3000ppm.

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Abstract

The invention relates to the technical field of MnZn ferrite materials, and discloses a MnZn ferrite material with low temperature coefficient and low loss at high frequency in order to realize high frequency and low loss of the MnZn ferrite material. The MnZn ferrite material comprises a main component, a first auxiliary component and a second auxiliary component, wherein the main component comprises Fe2O3, ZnO and MnO; the first auxiliary component comprises CaO, Nb2O5, ZrO2, V2O5 and Bi2O3; and the second auxiliary component is one or more selected from the group consisting of MoO3, Co2O3 and TiO2. A presintering temperature is controlled to be 650-800 DEG C during preparation; a sanding particle size before sintering is 0.8-1.2 [mu]m; and a secondary sintering temperature is 1055-1100DEG C. The prepared MnZn ferrite material has a relatively low temperature coefficient and a relatively low loss coefficient at high frequency.

Description

technical field [0001] The invention relates to the technical field of MnZn ferrite materials, in particular to a MnZn ferrite material with low temperature coefficient and low loss at high frequency and a preparation method thereof. Background technique [0002] MnZn ferrite materials are widely used in communication, audio equipment, automobiles, electronic transformers and other fields because of their narrow and long hysteresis loop, high magnetic permeability, high saturation magnetization, high resistivity and low loss. . With the rapid development of multimedia communication and digital communication network in recent years, users have more and more stringent requirements for MnZn ferrite, requiring low distortion, high stability and low loss. With the miniaturization of devices, MnZn ferrite materials are developing towards high frequency (low loss), and are used at frequencies of 500kH or higher. They are mainly used in communication filter cores to improve frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/03
CPCC04B35/2658C04B35/622H01F1/0315C04B2235/3208C04B2235/3251C04B2235/3244C04B2235/3239C04B2235/3298C04B2235/3275C04B2235/3256C04B2235/3232C04B2235/6567
Inventor 严正信吕飞雨王朝明
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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