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Method for processing silicon carbide microwave heating medium kiln furniture by using powdered quartz

A microwave heating and silicon carbide technology, which is applied in the field of kiln furniture, can solve unseen problems, and achieve the effects of improving heating effect, increasing power consumption and rapid heating

Pending Publication Date: 2020-03-27
江西拓普准晶新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powdered quartz ore has microcrystalline and spherical structure characteristics, and has super microwave absorption and heating characteristics after carbonization, but there is no report on using powdered quartz ore to make microwave heating medium kiln furniture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Mix the raw materials of powdered quartz and carbon powder in a molar ratio of 0.7:1, mechanically stir and mix (stirring speed 100r / min, stirring time 24h), put it into a vacuum sintering furnace for heating, heat to 1850°C, Keep warm for 10 hours, and then sinter to produce cubic silicon carbide powder, which is gray-black;

[0031] Step 2: Put the silicon carbide powder in step 1 into a microwave heating furnace and heat it to 800°C to oxidize the unreacted carbon powder into carbon dioxide to obtain light green cubic silicon carbide powder;

[0032] Step 3: Mix the cubic silicon carbide powder collected in step 2 with absolute ethanol in a ratio of 100g:10ml to form a slurry, and stir through a wet mill (stirring speed 30r / min, stirring time 24h), and then Extrude the mixed mud into a honeycomb silicon carbide body through an extrusion molding machine;

[0033] Step 4: Put the honeycomb silicon carbide body obtained in Step 3 into a microwave tunnel kiln fo...

Embodiment 2

[0038] Step 1: Mix the raw materials of powdered quartz and carbon powder in a molar ratio of 0.7:1, mechanically stir and mix (stirring speed 300r / min, stirring time 10h), put it into a resistance furnace for heating, heat to 1800°C, and keep warm After 20 hours, sintering produces cubic silicon carbide powder, which is gray-black;

[0039] Step 2: Put the silicon carbide powder in step 1 into a microwave heating furnace and heat it to 800°C to oxidize the unreacted carbon powder into carbon dioxide to obtain light green cubic silicon carbide powder;

[0040] Step 3: Mix the cubic silicon carbide powder collected in step 2 with absolute ethanol in a ratio of 100g:10ml to form a slurry, and stir through a wet mill (stirring speed 60r / min, stirring time 10h), and then Extrude the mixed mud into a single-walled tubular silicon carbide billet through an extrusion molding machine;

[0041] Step 4: Put the single-walled tubular silicon carbide green body obtained in Step 3 into a ...

Embodiment 3

[0046] Step 1: Mix the raw materials of powdered quartz and carbon powder in a molar ratio of 0.7:1, mechanically stir and mix (stirring speed 200r / min, stirring time 15h), put it into an intermediate frequency induction furnace for heating, and heat it to 1900°C. Keep warm for 10 hours, and then sinter to produce cubic silicon carbide powder, which is gray-black;

[0047] Step 2: Put the silicon carbide powder in step 1 into a microwave heating furnace and heat it to 800°C to oxidize the unreacted carbon powder into carbon dioxide to obtain light green cubic silicon carbide powder;

[0048] Step 3: Mix the cubic silicon carbide powder collected in step 2 with absolute ethanol in a ratio of 100g:10ml to form a slurry, and stir through a wet mill (stirring speed 60r / min, stirring time 10h), and then Extrude the mixed mud into a honeycomb silicon carbide body through an extrusion molding machine;

[0049] Step 4: Put the honeycomb silicon carbide body obtained in Step 3 into a ...

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PUM

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Abstract

The invention discloses a method for processing silicon carbide microwave heating medium kiln furniture by using powdered quartz. The method comprises the following steps of: mechanically stirring anduniformly mixing raw materials by mixing powder quartz and carbon powder according to a molar ratio of 0.7:1, then putting the mixed raw materials into a sintering furnace for heating to a temperature of 1800-1900 DEG C, performing preservation and sintering to generate cubic silicon carbide powder, heating the cubic silicon carbide powder to allow the silicon carbide powder and unreacted carbonpowder into carbon dioxide to obtain light green cubic silicon carbide powder; mixing the cubic silicon carbide powder with a proper amount of absolute ethyl alcohol to form mud, performing stirring,extruding the mixed mud into a silicon carbide microwave heating medium kiln furniture blank through a hydraulic machine, and performing drying and sintering to obtain the silicon carbide microwave heating medium kiln furniture. According to the invention, the powdered quartz ore is carbonized to synthesize silicon carbide, then the silicon carbide is manufactured into the microwave heating mediumkiln furniture, and the microwave heating medium kiln furniture is used in various microwave heating devices, so that the conversion efficiency of microwave energy can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of kiln furniture, and in particular relates to a method for processing silicon carbide microwave heating medium kiln furniture with powdered quartz. Background technique [0002] Microwave heating is widely used, especially in microwave ovens. There is a microwave heating chamber in microwave ovens. Microwave ovens use microwave emitting devices to emit microwaves to directly heat heated objects. The heated objects are heated at different speeds due to differences in physical properties, and the microwave energy conversion efficiency is low. Powdered quartz ore has microcrystalline and spheroidal structure characteristics, and has the characteristics of super microwave absorption and heating after carbonization, but there is no report on using powdered quartz ore to make microwave heating medium kiln furniture. Contents of the invention [0003] The object of the present invention is to provide a method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565F27B17/00
CPCC04B35/573C04B2235/3418C04B2235/6567F27B17/00
Inventor 朱忠铜李若普李婷
Owner 江西拓普准晶新材料股份有限公司
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