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Microwave absorbing material and preparation method thereof, special container for microwave oven

A microwave absorbing material and microwave technology are applied in the fields of microwave absorbing materials and their preparation, and special containers for microwave ovens, and can solve the problems of inability to fully meet product requirements, low heat storage performance of absorbing materials, and inability to meet high energy requirements, etc. Achieve the effect of increasing strength and density, reducing sintering temperature, and good microwave characteristics

Active Publication Date: 2016-11-23
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the use of microwave ovens becomes more and more common, more and more special microwave oven utensils are made of microwave materials. At present, most of the absorbing materials on the market are coated or loose powder. For specific products, due to the limitation of shape, it cannot fully meet the product requirements. In addition, the heat storage performance of current absorbing materials is relatively low, which cannot meet the demand for high energy.

Method used

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  • Microwave absorbing material and preparation method thereof, special container for microwave oven
  • Microwave absorbing material and preparation method thereof, special container for microwave oven

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preparation example Construction

[0028] The preparation method of the microwave absorbing material according to the embodiment of the present invention comprises the following steps:

[0029] 1) Mix 45-75 parts by weight of magnetic medium type metal fine powder, 15-30 parts by weight of resistive non-metallic fine powder, and 15-45 parts by weight of flux to obtain mixed powder.

[0030] Wherein, the magnetic medium-type metal fine powder is not particularly limited, and includes, for example, hydroxyiron powder, hydroxynickel powder, and the like. From the comprehensive consideration of electromagnetic properties, cost performance, etc., preferably, the magnetic medium type metal fine powder contains: 25-40 parts by weight of hydroxy-iron powder and 20-35 parts by weight of hydroxy-nickel powder.

[0031] In addition, the resistive non-metal fine powder includes silicon carbide powder, graphite powder, and the like. Considering that the strength of graphite powder is not high enough, and from the viewpoint...

Embodiment 1

[0053] The raw materials include: 30% iron hydroxy powder, 25% nickel hydroxy powder, 20% silicon carbide, 10% aluminum oxide, and 15% glass microspheres.

[0054] Mix according to the above composition ratio, ball mill for 11 hours and pass through a 325 mesh sieve.

[0055] A block-shaped green body is made by dry pressing.

[0056] After that, put the green body into the sintering furnace, heat it up to 850°C at a rate of 4°C / min, keep it warm for 3H, and then raise the temperature to 1100°C for 10H for sintering.

[0057] After sintering, the temperature is naturally cooled in the furnace to obtain the microwave absorbing material 1 .

Embodiment 2

[0059] The raw materials include: 35% iron hydroxy powder, 25% nickel hydroxy powder, 20% silicon carbide, 10% aluminum oxide, and 10% glass beads.

[0060] Mix according to the above composition ratio, ball mill for 13 hours and pass through a 325 mesh sieve.

[0061] The block green body is made by dry pressing.

[0062] After that, put the green body into the sintering furnace, heat it up to 800°C at a rate of 10°C / min, keep it for 3H, and then raise the temperature to 1000°C for 12H.

[0063] After sintering, the temperature is naturally cooled in the furnace to obtain the microwave absorbing material 2 .

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Abstract

The invention provides a microwave absorbing material, a method for manufacturing the same and a special container for a microwave oven. The method for manufacturing the microwave absorbing material includes steps of 1), mixing, by weight, 45-75 parts of magnetic medium type metal micro-powder, 15-30 parts of resistance type nonmetal micro-powder and 15-45 parts of fluxing agents with one another to obtain mixed powder; 2), carrying out ball-milling on the mixed powder for 10-15 hours to obtain ball-milled powder; 3), sieving the ball-milled powder to obtain undersize powder; 4), pressing and molding the undersize powder to obtain green bodies; 5), sintering the green bodies at the temperatures of 800-1200 Celsius degrees for 8-14 hours, and then cooling the green bodies to obtain the microwave absorbing material. The microwave absorbing material, the method and the special container in an embodiment of the invention have the advantages that the strength and the density of the microwave absorbing material can be greatly improved, a large quantity of heat energy can be easily generated and stored, and accordingly the microwave absorbing material can be directly used for manufacturing special microwave utensils; the microwave absorbing material and the special container are excellent in microwave characteristic, and the sintering temperatures can be lowered to a great extent.

Description

technical field [0001] The invention relates to the technical field of microwave container preparation, in particular to a microwave absorbing material and a preparation method thereof, and a special container for a microwave oven. Background technique [0002] As the use of microwave ovens becomes more and more common, more and more special microwave oven utensils are made of microwave materials. At present, most of the absorbing materials on the market are coated or loose powder. For specific products, due to the limitation of shape, it cannot fully meet the product requirements. In addition, the heat storage performance of current absorbing materials is relatively low, which cannot meet the demand for high energy. Contents of the invention [0003] The present invention aims to solve one of the above-mentioned technical problems at least to a certain extent. [0004] Therefore, an object of the present invention is to propose a method for preparing a microwave absorbin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/16C22C1/10C22C1/05
Inventor 郑文强叶建林
Owner GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD