Adhesive for online reaction connection of silicon carbide ceramics and preparation method thereof

A technology of silicon carbide ceramics and binder, which is applied in the field of silicon carbide ceramics, can solve problems such as difficulty in green body processing, problems in adsorption, gaps in the bonding layer, etc., to avoid sintering deformation, reduce bonding effect, and ensure fluidity Effect

Active Publication Date: 2016-03-30
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the binder of phenolic resin and aggregate silicon carbide particles to bond the silicon carbide body, the bond strength is high, but it will bring two problems for the precision manufacturing of silicon carbide. One is that after the phenolic resin is cured, The hardness is very high, and the green body is difficult to process; the second is that the phenolic resin binder is coated on the surface of the silicon carbide green body, and there is a problem in the adsorption of the silicon carbide green body to the phenolic slurry
Easy to cause voids in the bonding layer

Method used

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  • Adhesive for online reaction connection of silicon carbide ceramics and preparation method thereof
  • Adhesive for online reaction connection of silicon carbide ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare ingredients according to the following ratio:

[0038] Water 31.34%, polyacrylamide 6.07%, polyvinylpyrrolidone 1.48%, silicon carbide micropowder 38.43%, silicon powder 15.95%, carbon powder 6.76%. Among them, the mass ratio of silicon carbide powder with a particle size of 5 μm to silicon carbide powder with a particle size of 30 μm is 1.5:1; such a ratio can achieve good accumulation.

[0039] A method for preparing a bonding agent for online reaction connection of silicon carbide ceramics, comprising the following steps:

[0040] (1) Add water into polyacrylamide, stir to make it fully dissolved, then add polyvinylpyrrolidone to configure polyacrylamide solution;

[0041] (2) adding silicon powder and silicon carbide micropowder into the polyacrylamide solution in turn to form a slurry;

[0042] (3) Then, ball mill the slurry for 20 hours to obtain a binder.

[0043] A method of using a bonding agent for online reaction connection of silicon carbide ceram...

Embodiment 2

[0048] Prepare ingredients according to the following ratio:

[0049] Water 25%, polyacrylamide 5%, polyvinyl alcohol 1%, silicon carbide micropowder 45%, silicon powder 16%, carbon powder 8%. Among them, the mass ratio of silicon carbide powder with a particle size of 10 μm to silicon carbide powder with a particle size of 40 μm is 2:1;

[0050]A method for preparing a bonding agent for online reaction connection of silicon carbide ceramics, which is basically the same as that of Example 1, except that: ball milling for 15 hours;

[0051] A method of using a bonding agent for online reaction connection of silicon carbide ceramics to carry out online reaction connection of silicon carbide ceramics, which is basically the same as in Example 1, except that: in step (1), dry at 110°C for 5 hours; step (2) ) and sintered at 1450°C for 1 hour.

Embodiment 3

[0053] Prepare ingredients according to the following ratio:

[0054] Water 35%, polyacrylamide 7%, polyvinylpyrrolidone 2%, silicon carbide micropowder 30%, silicon powder 20%, carbon powder 6%.

[0055] Among them, the mass ratio of silicon carbide powder with a particle size of 1 μm to silicon carbide powder with a particle size of 20 μm is 1:1;

[0056] A method for preparing a bonding agent for on-line reaction connection of silicon carbide ceramics, which is basically the same as that of Example 1, the difference being: ball milling for 25 hours;

[0057] A method of using a bonding agent for online reaction connection of silicon carbide ceramics to carry out online reaction connection of silicon carbide ceramics, which is basically the same as in Example 1, except that: in step (1), dry at 130°C for 3 hours; step (2) ) and sintered at 1550°C for 3 hours.

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Abstract

The invention discloses a binder for silicon carbide ceramic online reaction joint and a preparation method thereof. The composition of the binder for silicon carbide ceramic online reaction joint comprises the following components in percentage by weight: 25-35% of water, 5-7% of polyacrylamide, 1-2% of adhesive, 30-45% of silicon carbide micro-powder, 10-20% of silicon powder and 5-8% of carbon powder. The method comprises the following steps: (1) adding polyacrylamide in water, stirring to adequately dissolve polyacrylamide, and then adding the adhesive to prepare polyacrylamide solution; (2) sequentially adding Si powder, C powder and the silicon carbide micro-powder in the polyacrylamide solution to prepare slurry; (3) carrying out ball-milling on the slurry to obtain the binder. The binder disclosed by the invention has the same ingredients with a blank, thus avoiding the sintering deformation due to non-uniform ingredients; the solid content is proper, thus ensuring the flowability of the slurry; the water amount is proper, thus avoiding the reduction of a binding effect due to the too fast slurry absorption of the blank; moreover, the silicon powder and the carbon powder are added in the binder according to stoichiometric ratio, thus avoiding carbon enrichment or silicon enrichment in the sintered products.

Description

technical field [0001] The invention relates to the field of silicon carbide ceramics, in particular to an adhesive for online reaction connection of silicon carbide ceramics and a preparation method thereof. Background technique [0002] Due to its many advantages, such as high strength, high hardness, high elastic modulus, excellent thermal stability, high thermal conductivity, low thermal expansion coefficient, good specific stiffness and optical processing performance, silicon carbide ceramics are especially suitable for precision The application of motion platform skeleton, suction cup, water cooling plate, and precision measuring mirror, grating and other components. Therefore, silicon carbide ceramic materials, as one of the materials for preparing lithography machine components, have received extensive attention. Most of the ceramic parts required by lithography machines are hollow structures, and some parts are large in size. For these structural parts, two parts, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
Inventor 霍艳丽刘海林王春朋陈曙光
Owner CHINA BUILDING MATERIALS ACAD
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