Liquid-state sintering anti-sticking method for silicon carbide ceramics

A technology of silicon carbide ceramics and liquid phase sintering, which is applied in the field of inorganic materials, can solve problems such as complex procedures, harmful effects on the human body and the environment, and many components, and achieve the effects of reducing complex procedures, strong operability, and reducing production costs

Inactive Publication Date: 2016-02-03
LUOYANG MINGLI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-sticking coating is mainly made of graphite powder, carbon black, formaldehyde and other main components. This method requires many components and complicated procedures, and each sintering needs to be cleaned and repainted in time, and the production cost is high.
In addition, anti-adhesive coatings generally contain a certain amount of toxic and harmful substances such as
Powder spreading is relatively simple and easy, but its disadvantage is that it is easy to form small pits on the product, which affects the surface quality of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Y 2 o 3 -Al 2 o 3 Before sintering the silicon carbide green body with 2% sintering aid content, clean the graphite setter plate with a vacuum cleaner or a brush, cut the wax paper into a shape consistent with the size of the setter plate, and spread a layer on the setter plate , and then place the silicon carbide green body on the wax paper, with a distance of about 2mm from each other, and then send it into the furnace for sintering.

Embodiment 2

[0014] Example 2: Y 2 o 3 -Al 2 o 3 Before sintering the silicon carbide green body with 5% sintering aid content, clean the graphite setter plate with a vacuum cleaner or a brush, cut the wax paper into a shape consistent with the size of the setter plate, and spread two layers on the setter plate , and then place the silicon carbide green body on the wax paper, with a distance of about 2mm from each other, and then send it into the furnace for sintering.

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PUM

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Abstract

The invention provides a liquid-state sintering anti-sticking method for silicon carbide ceramics. The method comprises the following steps: placing one or more layers of flint paper on a graphite load bearing board; placing a silicon carbide blank body on the flint paper; feeding the graphite load bearing board into a sintering furnace to be sintered, wherein if stacking of products is required, the flint paper can be placed between the products. The liquid-state sintering anti-sticking method can prevent silicon carbide ceramic products from cementation during high-temperature sintering, optimizes the production procedures, and is simple to operate and relatively low in manufacturing cost.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a method for preventing bonding of products under high-temperature conditions in a silicon carbide ceramic sintering process. Background technique [0002] Liquid phase sintering of silicon carbide ceramics is a kind of pressureless sintering. By adding Y2O3-Al2O3 as a sintering aid, the sintering temperature of silicon carbide can be effectively reduced and a highly dense product can be obtained. During the liquid phase sintering process of silicon carbide ceramics, due to the existence of the liquid phase, adhesion between products and between products and setter plates is very easy to occur, resulting in carburization, deformation, and uneven bottom defects. [0003] The range of sintering aids in silicon carbide ceramics is wide, generally 1-6%, and the products are of different sizes. The traditional anti-adhesive measures for silicon carbide ceramics are to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64C04B35/565
Inventor 裴晓辉刘天辉
Owner LUOYANG MINGLI TECH DEV
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