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Thermal-shock-resisting soft magnetic ferrite material and preparation method thereof

A soft ferrite, heat-resistant technology, applied in the field of thermal shock soft ferrite material and its preparation, can solve the problems of non-uniform magnetic core density, poor organizational uniformity, low blank strength, etc. High conductivity, dense structure, and the effect of reducing sintering temperature

Inactive Publication Date: 2015-09-02
ANHUI KING AUTO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding method of ferrite cores in industrial production is mainly dry pressing, which has great restrictions on the shape of the core, and has low green body strength, uneven internal density and poor structure uniformity of the sintered core. Easy to crack and other limitations

Method used

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Embodiment Construction

[0013] The present invention will be described in detail below through specific examples.

[0014] A thermal shock resistant soft magnetic ferrite material and its preparation method, made of the following raw materials in parts by weight (kg): 63 ferric oxide, 18 nickel oxide, 7 zinc oxide, 0.8 copper oxide, 0.2 vanadium pentoxide , polyvinylpyrrolidone 0.2, sawdust 0.6, sodium lignosulfonate 0.03, silicone resin 3, appropriate amount of deionized water;

[0015] A heat-shock resistant soft magnetic ferrite material and its preparation method described in the present invention are made by the following specific steps:

[0016] (1) Clean the sawdust, dry and pulverize it, then add ferric oxide, nickel oxide, zinc oxide, sawdust and deionized water into the ball mill for wet ball milling and mix evenly. The ball milling time is 6 hours;

[0017] (2) Place the powder obtained in step (1) in a sintering furnace for pre-sintering, the pre-sintering temperature is controlled at 75...

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Abstract

The invention discloses a thermal-shock-resisting soft magnetic ferrite material and a preparation method thereof. The thermal-shock-resisting soft magnetic ferrite material is characterized by comprising the following raw materials in parts by weight: 50 to 70 parts of iron sesquioxide, 10 to 20 parts of nickel oxide, 5 to 10 parts of zinc oxide, 0.5 to 0.8 part of copper oxide, 0.2 to 0.3 part of vanadium pentoxide, 0.1 to 0.3 part of polyvinylpyrrolidone, 0.4 to 1 part of saw dust, 0.02 to 0.06 part of sodium lignin sulfonate, 2 to 4 parts of organic silicon resin and an appropriate amount of deionized water. By adopting the copper oxide, a crystal grain is more complete, the tissue is compacter, the temperature property can be improved, the thermal shock resistance can be improved, and the magnetic hysteresis loss can be reduced; the vanadium pentoxide is transformed to liquid phase at high temperature and is sintered, and the crystal grain is refined, so that the crystal interface and porosity in the crystal grain can be reduced, the starting magnetic conductivity can be enhanced. The soft magnetic ferrite material has characteristics of high strength, high starting magnetic conductivity and high thermal shock resistance and is capable of meeting the miniaturization requirement of a surface-mounted product.

Description

technical field [0001] The invention relates to the field of soft ferrite materials, in particular to a thermal shock-resistant soft ferrite material and a preparation method thereof. Background technique [0002] Soft magnetic ferrite mainly includes two series of MnZn and NiZn ferrite, and its products are mainly used in the fields of computers, communications, power supply cores and consumer electronics products, and are important functional materials in the electronics industry. Compared with MnZn ferrite, NiZn ferrite has the advantages of high resistivity, high frequency of use, and is suitable for making various surface mount components. Surface mount components require that the product must meet conditions such as being suitable for surface mounting and soldering, and high strength. With the miniaturization of surface mount products, this puts forward stricter requirements on the mechanical strength and thermal shock characteristics of NiZn-based ferrite materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 王进
Owner ANHUI KING AUTO ELECTRONICS TECH CO LTD
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