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Microcrystalline ceramic composite electrothermal material and method for preparing far-infrared ceramic electrothermal plate by using same

A technology of far-infrared ceramics and electric heating materials, applied in the field of high-performance electric heating materials and the production of far-infrared ceramic electric heating plates with this material, can solve the problems of poor electrical insulation performance, short working life, unstable electrical parameters, etc., and achieve insulation Good performance and long service life

Active Publication Date: 2013-09-11
XIANGTAN QUFO TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the reported non-metallic electric heating materials mainly include conductive heating coatings, silicon carbide materials, lanthanum chromate materials, PTC ceramic materials, carbon fibers, electric heating films, carbon crystals, carbon ceramic composite materials, etc., some of which may have poor electrical insulation performance and work Short life, easy aging, low conversion efficiency of electricity to radiant heat, difference in expansion coefficient between the heating element and the electrical component substrate, resulting in large power attenuation, unstable electrical parameters, etc.

Method used

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  • Microcrystalline ceramic composite electrothermal material and method for preparing far-infrared ceramic electrothermal plate by using same

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specific Embodiment approach 1

[0023] In this embodiment, the microcrystalline ceramic composite electric heating material is composed of graphite microcrystals with a particle size of 30-50 μm, accounting for 59.5% of the total weight, and destatic graphitized carbon crystals accounting for 0.5% of the total weight, accounting for 40% of the total weight. Carbon SiC-B 4 C composite powder forms a solid phase mixture, and then mixes it with water and polyacrylic acid sodium salt at a mass ratio of 100:35:0.5 to make a slurry, which is sanded and homogenized by a horizontal sand mill for 2 hours, and then dried Dry and pulverize to obtain a composite electric heating material. The described destatic graphitized carbon crystal is composed of polyacrylonitrile-based carbon fibers with a count of 12K and a diameter of 7 μm, cut into carbon fibers with a length of 3 to 6 mm, and graphite crystallites with a particle size of 1 to 2 μm by weight Mixed at a ratio of 20:1, and processed by ball milling into destati...

specific Embodiment approach 2

[0024] The difference between this embodiment and specific embodiment 1 is that the microcrystalline ceramic composite electrothermal material is composed of graphite microcrystals accounting for 40% of the total weight, destatic graphitized carbon crystals accounting for 1% of the total weight, accounting for 59% of the total weight SiC-B with excess carbon 4 C composite powder composition. Others are the same as the first embodiment.

specific Embodiment approach 3

[0025] The difference between this embodiment and specific embodiment 1 is that the microcrystalline ceramic composite electrothermal material is composed of graphite microcrystals accounting for 50% of the total weight, destatic graphitized carbon crystals accounting for 5% of the total weight, and 45% of the total weight. SiC-B with excess carbon 4 C composite powder composition. Others are the same as the first embodiment.

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Abstract

The invention relates to a microcrystalline ceramic composite electrothermal material and a method for preparing a far-infrared ceramic electrothermal plate by using the same. The microcrystalline ceramic composite electrothermal material is composed of graphite microcrystal, antistatic graphitized carbon crystal and SiC-B4C-containing excessive carbon. The method for preparing the far-infrared ceramic electrothermal plate comprises the following steps: mixing the microcrystalline composite powder with ceramic blank clay, carrying out ball milling, granulating, molding, applying a mixed glaze slip of microcrystalline powder containing low-temperature thermosensitive high-infrared-emittance anions on the surface of the plate blank, firing to form a planar heating plate, and establishing a conductive electrode on the lower surface of the plate. The far-infrared ceramic electrothermal plate has the advantages of uniform and stable thermal properties, high heating speed, favorable electric insulation property, long service life high electrothermal conversion efficiency and high infrared emittance, and can release anions. The far-infrared ceramic electrothermal plate can be directly made into heating wall bricks and heating floor tiles, can also be used as main components in electric heating appliances, and is widely used for heating in families and offices as well as medical treatment.

Description

technical field [0001] The invention relates to a high-performance electrothermal material and a method for using the material to produce a far-infrared ceramic electrothermal plate, which belongs to the field of electrothermal materials and also belongs to the field of special ceramics. Background technique [0002] With the rapid development of modern science and technology and people's increasing requirements for quality of life and environmental protection, the heating conditions and requirements for various households, office heating and physiotherapy, health care and medical occasions are also getting higher and higher. Due to the outstanding advantages of electric heating, it is widely used in the above occasions. Electric heating elements can generally be made of metallic or non-metallic materials. Metal electrothermal materials cause energy loss due to the generation of part of visible light after electrification, and the electrothermal conversion efficiency is not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B18/00C04B35/80C04B35/622C04B41/86
Inventor 张永利
Owner XIANGTAN QUFO TECH MATERIAL CO LTD
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