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SiC composite powder applied to infrared radiation energy-saving coating and preparation method of SiC composite powder

An energy-saving coating, infrared radiation technology, applied in coatings, sustainable manufacturing/processing, chemical industry, etc., can solve problems such as easy oxidation and failure, and achieve the effects of easy operation, economical cost, and good controllability

Active Publication Date: 2018-07-13
天津中材工程研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emissivity of infrared radiation energy-saving coatings mainly depends on its radiation base material. SiC powder is an excellent radiation base material, but there are technical problems such as its easy oxidation and failure at high temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The invention relates to a SiC composite material powder applied to infrared radiation energy-saving coatings. The surface of SiC powder particles is covered with a mullite phase anti-oxidation protective layer.

Embodiment 2

[0040] A method for preparing SiC composite material powder applied to infrared radiation energy-saving coatings, comprising the following process:

[0041] Step 1: ultrasonically disperse SiC powder particles into industrial aluminum sol;

[0042] Step 2: Add industrial silica sol to the system of Step 1, and stir evenly;

[0043] Step 3: Pour the uniformly stirred mixture in Step 2 into an open flat-bottomed vessel, and place it in an oven to dry to obtain a slurry;

[0044] Step 4: Put the above-mentioned slurry into a vacuum drying oven, and carry out vacuum drying at room temperature;

[0045] Step 5: Grinding the dried product into fine powder particles;

[0046] Step 6: Put the fine powder particles into a rotary tube furnace, rotate and calcine at a constant speed, and then heat up and rotate and calcine in an air or oxygen atmosphere, then cool naturally to obtain a SiC composite material powder coated with a mullite phase anti-oxidation protective layer on the surf...

Embodiment 3

[0053] A method for preparing SiC composite material powder applied to infrared radiation energy-saving coatings, comprising the following process:

[0054] First, ultrasonically disperse SiC powder particles with a particle size of 5 μm to a pH value of 3, Al 2 o 3 In industrial aluminum sol with a solid content of 15%. The ultrasonic dispersion time is 20 minutes, and the mass ratio of SiC powder particles to industrial aluminum sol is 1:200.

[0055] Slowly add the pH value to the above system to be 3, SiO 2 Industrial silica sol with a solid content of 15%, stirred evenly. Al in the mixture after stirring 2 o 3 The solid content is 60%.

[0056] Then pour the evenly stirred mixture into an open flat-bottomed vessel, control the liquid level to 10mm, and place it in an oven to raise the temperature to 80° C. and dry it at a constant temperature for 6 hours to obtain a slurry. Put the slurry into a vacuum drying oven and dry it under vacuum at room temperature for 24 ...

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Abstract

The invention relates to SiC composite powder applied to an infrared radiation energy-saving coating and a preparation method of the SiC composite powder, and belongs to the technical field of functional materials. The SiC composite powder applied to the infrared radiation energy-saving coating is characterized by being coated with a mullite-phase antioxidant protective layer on the surfaces of particles, and the preparation method of the SiC composite powder applied to the infrared radiation energy-saving coating comprises the following steps: 1, ultrasonically dispersing SiC powder particlesto industrial aluminum sol; 2, adding industrial silica sol and uniformly stirring; 3, pouring into an open flat-bottomed utensil and drying in an oven to obtain slurry; 4, putting in a vacuum dryingbox to be dried in vacuum at room temperature; 5, grinding into fine powder particles; 6, placing the fine powder particles into a rotating tube furnace, calcining rotationally at a constant speed, and naturally cooling to obtain the SiC composite powder of which the surface is coated with the mullite-phase antioxidant protective layer. The SiC composite powder applied to the infrared radiation energy-saving coating disclosed by the invention has the advantages of excellent high-temperature oxidation resistance, low cost, simple and convenient technological process, high controllability, wideapplication prospects and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a SiC composite material powder used in infrared radiation energy-saving coatings and a preparation method thereof. Background technique [0002] At present, the energy saving of industrial furnaces is achieved by strengthening the three heat transfer methods of conduction, convection and radiation. For high-temperature furnace environment, enhanced radiation heat transfer plays a vital role in the energy saving of the furnace. Because of the high temperature environment above 1000°C, about 80% of the heat in the kiln is carried out by radiation heat transfer. In addition, my country's furnace energy-saving technology based on enhanced convection and heat conduction (including lightweight furnace body and low thermal conductivity technology of insulation materials) has almost reached its limit. Therefore, enhancing the radiation heat transfer capability...

Claims

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Application Information

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IPC IPC(8): C09D7/62
CPCC08K3/34C08K9/10C08K2201/003Y02P20/10
Inventor 董正洪胡芝娟赵春芳赵利卿单丹张珂张帆尤健
Owner 天津中材工程研究中心有限公司
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