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Preparation method of heat-resistant composite magnetic material

A magnetic material and heat-resistant technology, which is applied to the magnetism of organic materials/organic magnetic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., can solve problems such as ignoring heat resistance, achieve good curing effect, and improve overall performance , High heat resistance effect

Inactive Publication Date: 2016-01-20
苏州凯欧曼新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing magnetic materials ignore heat resistance, which is closely related to application performance, for outstanding magnetic flux performance.

Method used

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Examples

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Embodiment 1

[0021] Embodiment 1 A method for preparing a heat-resistant composite magnetic material, comprising the following steps:

[0022] (1) Disperse 300g of nano-silica foam in deionized water, then add 100g of dodecylbenzenesulfonic acid and 400g of bismuth nitrate pentahydrate; then hydrothermally react at 150°C for 10 hours; then filter the reaction solution to obtain a solid powder; then mix the solid powder with 1Kg ferric oxide, and ball mill for 1 hour to obtain the mixture; use phthalate as binder, press the mixture into tablets; then calcined at 850°C for 3 hours; then in a nitrogen atmosphere sintering at 1250°C for 5 hours, and after natural cooling, crush the obtained solid to obtain a filler with a particle size of 1.8 to 2.5 microns;

[0023] (2) Mix 5g of phenolic compound and 100g of bisphenol A cyanate monomer, stir at 90°C for 20 minutes, add 2g of methylene tetrahydrobiphenyl dicarboxylic anhydride, and continue stirring for 10 minutes; then add 19g of pentaerythr...

Embodiment 2

[0025] Embodiment 2 A method for preparing a heat-resistant composite magnetic material, comprising the following steps:

[0026] (1) Disperse 300g of nano-silica foam in deionized water, then add 100g of dodecylbenzenesulfonic acid and 400g of bismuth nitrate pentahydrate; then hydrothermally react at 150°C for 10 hours; then filter the reaction solution to obtain a solid powder; then mix the solid powder with 1Kg ferric oxide, and ball mill for 1 hour to obtain the mixture; use phthalate as binder, press the mixture into tablets; then calcined at 850°C for 3 hours; then in a nitrogen atmosphere sintering at 1250°C for 5 hours, and after natural cooling, crush the obtained solid to obtain a filler with a particle size of 1.8 to 2.5 microns;

[0027] (2) Mix 5g of phenolic compound and 100g of bisphenol A cyanate monomer, stir at 90°C for 20 minutes, add 3g of methylenetetrahydrobiphenyl dicarboxylic anhydride, and continue stirring for 10 minutes; then add 19g of pentaerythri...

Embodiment 3

[0029] Embodiment 3 A method for preparing a heat-resistant composite magnetic material, comprising the following steps:

[0030] (1) Disperse 300g of nano-silica foam in deionized water, then add 100g of dodecylbenzenesulfonic acid and 400g of bismuth nitrate pentahydrate; then hydrothermally react at 150°C for 10 hours; then filter the reaction solution to obtain a solid powder; then mix the solid powder with 1Kg ferric oxide, and ball mill for 1 hour to obtain the mixture; use phthalate as binder, press the mixture into tablets; then calcined at 850°C for 3 hours; then in a nitrogen atmosphere sintering at 1250°C for 5 hours, and after natural cooling, crush the obtained solid to obtain a filler with a particle size of 1.8 to 2.5 microns;

[0031] (2) Mix 8g of phenolic compound and 100g of bisphenol A cyanate monomer, stir at 90°C for 20 minutes, add 2g of methylenetetrahydrobiphenyl dicarboxylic anhydride, and continue stirring for 10 minutes; then add 19g of pentaerythri...

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Abstract

The invention relates to a preparation method of a heat-resistant composite magnetic material. The method comprises the following steps: mixing a phenolic compound with a bisphenol A cyanate ester monomer, and adding endo-methylene tetrahydro-biphenyl dimethylbenzene anhydride, pentaerythritol tetraacrylate and bisphenol A epoxy resin to obtain a resin prepolymer; mixing the resin prepolymer with methylene bis(dialkylthiocarbamate), a modified magnetic filler and a heterogeneous undecanol polyoxyethylene ether phosphate kalium salt to obtain a composite system; injecting the composite system into a mold coated with a release agent, and carrying out mold pressing in a vacuum condition; and finally turning off a power supply, naturally cooling the product and demolding the product to obtain the heat-resistant composite magnetic material. The heat-resistant composite magnetic material has excellent flame retardant property and heat resistance, and meets development and application of the heat-resistant composite magnetic material.

Description

technical field [0001] The invention belongs to the technical field of novel composite materials, and in particular relates to a preparation method of a heat-resistant composite magnetic material. Background technique [0002] Magnetic materials refer to substances that can directly or indirectly generate magnetism from excessive elements such as iron, cobalt, nickel and their alloys. Magnetic materials can be divided into soft magnetic materials and hard magnetic materials according to the difficulty of demagnetization after magnetization. The material that is easy to demagnetize after magnetization is called soft magnetic material, and the material that is not easy to demagnetize is called hard magnetic material. Generally speaking, the remanence of soft magnetic materials is small, and that of hard magnetic materials is relatively large. [0003] With the continuous development of science and technology, the application of polymer matrix composites is becoming more and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42H01F41/00
Inventor 费根华
Owner 苏州凯欧曼新材料科技有限公司
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