A kind of mnzn ferrite material with low temperature coefficient and low loss at high frequency and its preparation method

A low temperature coefficient, ferrite material technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of high price and increase the cost of MnZn ferrite materials, and achieve low temperature coefficient and excellent electromagnetic properties , Appropriate and uniform grain size

Active Publication Date: 2022-05-20
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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  • A kind of mnzn ferrite material with low temperature coefficient and low loss at high frequency and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0032] The main component is: Fe 2 O 3 : 5.5mol, ZnO: 0.6mol, MnO: 3.9mol;

[0033] Based on the main component, the first auxiliary components are: 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: sanding the mixed material in a sanding machine, the mass ratio of material, ball and water for sanding is 1:1:0.6, the sanding time is 3 hours, and the average particle size after sanding...

Embodiment 2

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

[0042] The main component is: Fe 2 O 3 : 5.4mol, ZnO: 0.8mol, MnO 3.8mol;

[0043] Based on the main component, 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 at high frequency, compared with embodiment 1, the difference is, in the batching of step (1):

[0047] The main component is: Fe 2 O 3 : 5.7mol, ZnO: 0.5mol, MnO: 3.8mol;

[0048] Based on the main component, 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. In order to realize the high frequency and low loss of MnZn ferrite materials, a MnZn ferrite material with low temperature coefficient and low loss at high frequencies is disclosed, including main components, second An auxiliary component and a second auxiliary component; the main component is Fe 2 o 3 , ZnO, MnO; the first auxiliary component includes CaO, Nb 2 o 5 , ZrO 2 , V 2 o 5 、 Bi 2 o 3 ; The second auxiliary component is MoO 3 、Co 2 o 3 and TiO 2 One or more of them, during preparation, the pre-firing temperature is controlled to be 650-800°C, the sand mill particle size before sintering is 0.8-1.2 um, and the secondary sintering temperature is 1055-1100°C. The prepared MnZn ferrite material has lower temperature coefficient and lower 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. Background technique [0002] MnZn ferrite materials are widely used in communications, audio equipment, automobiles, electronic transformers and other fields due to their narrow and long magnetic hysteresis loop, high permeability, high saturation magnetization, high resistivity and low loss. . In recent years, with the rapid development of multimedia communication and digital communication networks, users have become more and more demanding on MnZn ferrites, requiring low distortion, high stability and low loss. With the miniaturization of devices, MnZn ferrite materials are developed towards high frequency (low loss), and are used at frequencies of 500kH or higher, mainly for communication filter cores to improve frequency reliability, reduce distor...

Claims

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Application Information

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Patent Type & Authority Patents(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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