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Zone sintering method for long and porous ceramics

A sintering method and porous technology, which is applied in the field of ceramic sintering, can solve the problems of expensive equipment, prolonged sintering cycle, and a large amount of sintering energy, and achieve the effects of reduced cost, reduced energy, and reduced energy consumption costs

Inactive Publication Date: 2005-06-29
QINGHAI UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This sintering method still has the following technical problems: one, because the sintering device must be enlarged, so the cost of the device will become expensive, and a large amount of sintering energy is required, and the sintering cycle is correspondingly prolonged; , will break in the middle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take Mix 54 # SiC particles 100 parts, 1000 # SiC particles 10 parts, surface area 10m 2 / g of high-purity alumina fine powder, 2 parts of potato powder, 20 parts of purely heating and dissolving binder, and 100 parts of pure water are mixed to make a slurry. The slurry is injected into a hollow plaster mold with a length of 1.6 m and a diameter of 6 cm, and after drying for 20 days, a tubular molded body with one end closed can be obtained.

[0015] During sintering, the tubular formed body is first placed on a movable support platform, and then introduced into a regional sintering furnace preheated to 1400°C at a moving speed of 25cm / hour. The length of the highest temperature part of the zone-type sintering furnace used is 50 cm, and each part of the sintered object is maintained in an environment of 1400 ° C for 2 hours. The sintered body has no cracks and deformation, and the sintering is good.

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Abstract

The invention relates a method for ceramics burn, concretely, relates to an area burn method for ceramic switch long size and multiple holes applied in high temperature gas filtration pipe, bubble generator and burner used in chemical industry and heat exchanger. Place the substance to be burnt on the unfixed support plate by which they can be moved into or out from the furnace, they are moved into vertically from the bottom, with their lengths; longer than that of the part of furnace with the highest temperature. The invention has lots of beneficial effect: since it uses area furnace, the price and energy are both decreased, besides, the time for burn is much shorter. The invention uses area burn and has balanced moving speed, so that the substance to be burnt will be broken and deformation, the ceramics material burnt is wholly average.

Description

technical field [0001] The invention relates to a ceramic sintering method, in particular to a long-sized porous ceramic used in filter tubes used in high-temperature gases at 250°C to 1000°C, bubble generator burners for chemical industry, and heat exchangers regional sintering method. Background technique [0002] The sintering of large ceramic products such as long-sized articles generally adopts a batch-type sintering method. The product to be sintered is fixed in the furnace chamber of a large sintering furnace for sintering. Products such as long and thin tubes or rods and plates are mostly hung up for sintering. This method relies on the weight of the sintered body itself to correct the bending and other deformations generated during the sintering process. Ceramic products such as long-dimension tubes are generally sintered by hanging. This sintering method still has the following technical problems: one, because the sintering device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64C04B38/00
Inventor 李建保铁生年岛井骏藏宣俊刚莫鹏君陈列左剑峰
Owner QINGHAI UNIVERSITY
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