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Wide-temperature range low-loss Mn-Zn ferrite and its preparation method

A low-loss, ferrite technology, applied in the preparation of the ferrite, in the field of manganese-zinc ferrite with wide temperature and low loss, can solve the problems of high cost and large amount of cobalt oxide added, and achieve good formability. Effect

Active Publication Date: 2012-04-25
NANTONG GUANYOUDA MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] >The 6th issue of 2003 published CO 2+ or Sn 4+ Study on the influence of manganese zinc ferrite magnetic properties, the research results show that due to CO 2+ It has a large and positive magnetocrystalline anisotropy constant K1, so it can be compensated with the negative K1 of MnZn ferrite. When the amount of C00 added is 2*10 -3 , manganese zinc ferrite with very flat power loss-temperature characteristics can be obtained in the temperature range of 20 ° C to 120 ° C, CO 2+ The incorporation of MnZn ferrite can improve the temperature characteristics of the initial magnetic permeability at the same time, but due to the large amount of cobalt oxide added, the cost is high

Method used

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  • Wide-temperature range low-loss Mn-Zn ferrite and its preparation method
  • Wide-temperature range low-loss Mn-Zn ferrite and its preparation method

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Embodiment 1

[0025] A) Weigh 54.2mol% Fe2 o 3 , 39.45mol% of MnO and 6.35mol% of ZnO, wherein the raw material of MnO is Mn 3 o 4 , using the grade CR-06 sold by Hunan Jinrui Technology Co., Ltd. in Hunan Province, China, with a purity of Mn% ≥ 71%, Fe 2 o 3 Domestic Shanghai Baosteel is used with a purity of Fe2O3% ≥ 99.3%. ZnO is produced and sold by Shanghai Jinghua Chemical Factory, and its weight percentage content is ZnO% ≥ 99.7%. The above three raw materials are mixed in proportion and put into a vibration mill Vibration milling is carried out in the medium, and the average particle size is controlled to be 0.95±0.20 μm to obtain the main component powder;

[0026] B) The main component powder obtained in step A) is vibrated and ground to meet the process requirements, then granulated and dried, and then pre-fired with an electric rotary kiln at a temperature of 870±30°C. After the pre-burning is completed, put the pre-fired material into Circulating sand milling is carried out...

Embodiment 2

[0032] A) Weigh 54.1mol% Fe 2 o 3 , 38.95mol% of MnO and 6.85mol% of ZnO, wherein the raw material of MnO is Mn 3 o 4 , using Hunan Jinrui CR-06, its purity Mn% ≥ 71%, Fe2O3 using domestic Shanghai Baosteel, its purity Fe 2 o 3 % ≥ 99.3%, ZnO uses Shanghai Jinghua, and its weight percentage content ZnO% ≥ 99.7%. After mixing the above three raw materials in proportion, they are put into a vibration mill for vibration grinding, and the average particle size is controlled to be 0.95±0.20μm. Obtain the main component powder;

[0033] B) The main component powder obtained in step A) is vibrated and ground to meet the process requirements, then granulated and dried, and then pre-fired in an electric rotary kiln at a temperature of 870±30°C. After the pre-burning is completed, the pre-fired material is put into sand Circulating sand milling is carried out in the mill. During the process of circulating sand milling, pure water, dispersant, defoamer, PVA are added, and auxiliary ...

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Abstract

Belonging to the fields of Mn-Zn ferrites and their preparation technologies, the invention relates to a wide-temperature range low-loss Mn-Zn ferrite and its preparation method. The ferrite comprises main components and auxiliary components, wherein, the main components include iron oxide, manganese oxide and zinc oxide. The ferrite is characterized in that, the main components have the following mole percent content calculated in their respective reference substances: 50 mol%- -56 mol% of Fe2)3, 0.36 mol%-42 mol% of MnO, and 5 mol%-10 mol% of ZnO. The auxiliary components consist of a titanium oxide, a cobalt oxide, a bismuth oxide and an ultrafine silicon oxide. Relative to the total amount of the main components, the titanium oxide, the cobalt oxide, the bismuth oxide and the ultrafine silicon oxide have a total weight percent content of 0.06-0.98 wt% calculated in their reference substances TiO2, CO2O3, Bi2O3 and ultrafine SiO2. The Mn-Zn ferrite powder of the invention has good mouldability, and has a wide atmosphere adaptation scope in the sintering process, and the sintered product can reach the expected technological indexes.

Description

technical field [0001] The invention belongs to the technical field of MnZn series ferrite and its preparation, in particular relates to a manganese zinc series ferrite with wide temperature and low loss, and also relates to a preparation method of the ferrite. Background technique [0002] With the development of household appliances, automotive electronics, energy-saving lamps, solar energy and communication facilities, etc. to the direction of miniaturization, lightness, integration and multi-function, soft ferrite magnetic materials have been more and more widely used in these devices Applications. Among them, manganese-zinc ferrite magnetic materials with high frequency, wide temperature, high DC superposition, high magnetic permeability, low loss, high Curie temperature and other properties are becoming more and more popular in power transformers, DC~DC, DC~AC, electrodeless lamps, etc. , solar energy, office automation, communications and other fields indispensable c...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 刘运徐良保戴加兵
Owner NANTONG GUANYOUDA MAGNET
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