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A kind of connection method of ceramic biscuit

A technology of ceramic green body and connection method, which is applied in the field of ceramics, can solve problems such as lack of detailed description and affect the effect of ceramic connection, and achieve the effects of prolonging timeliness, avoiding inclusion of air bubbles, and strong operability

Active Publication Date: 2019-11-05
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent explains in detail the preparation method and heat treatment process of the connecting slurry, it does not give a detailed description of how the slurry is applied to the surface to be connected. When the area of ​​the surface to be connected is large enough, how to apply the connecting slurry It will directly affect the connection effect of ceramics on the connection surface

Method used

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  • A kind of connection method of ceramic biscuit
  • A kind of connection method of ceramic biscuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] combine figure 1 As shown, A and B are two silicon carbide green bodies respectively, which are respectively recorded as the first silicon carbide green body and the second silicon carbide green body. The connection method between the two is as follows:

[0033] (1) Treatment of silicon carbide blanks

[0034] Firstly, the surfaces of A and B to be connected are processed into a plane, and the floating ash on the surface is cleaned with ethanol and then dried. Brush the thermoplastic phenolic resin solution with a mass fraction of 7% on the surface, and set aside.

[0035] (2) Preparation of connecting slurry

[0036] Prepare 20% of silicon carbide micropowder with the same particle gradation as A and B; thermoplastic phenolic resin 30%; acrylamide 5%; ethanol 30%; polyethylene glycol 200 (PEG 200) 5%, hexamethylene tetra Amine 10%; the above proportions are volume ratios, and the sum of the percentages is 100%. After the above materials are mixed, silicon carbide b...

Embodiment 2

[0042] It is basically the same as Example 1, except that in step (3), the thickness of the tape-cast connection slurry is 3 mm, and then the first silicon carbide green body A and the tape-cast connection layer C are placed simultaneously Place it in a 50°C environment for 5 hours, then take it out, and let it air out at the same temperature as room temperature. In step (4), a pressure of 0.5 MPa is applied after the surface to be connected of the second silicon carbide green body B is bonded to the connection layer C, and the connected green body is heated to 200° C. in a heating furnace while maintaining the pressure, thereby Complete the connection between the silicon carbide green bodies.

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Abstract

The present invention relates to the technical field of ceramics, and specifically discloses a method for connecting ceramic green bodies. The connecting method includes steps: S1, performing pre-machining on the surface to be connected of the first ceramic green body and the surface to be connected of the second ceramic green body respectively. Processing; S2, attaching the connecting slurry to the surface to be connected of the first ceramic green body for tape casting; S3, forming a connecting layer after tape casting, and fixing it on the first ceramic green body; S4, placing the second ceramic green body The surfaces to be connected of the blanks are docked with the connection layer, so that the connection layer is solidified, and the connection between the two ceramic green bodies is realized. The connection method of the present invention first tape-casts the connection slurry with one of the ceramic green bodies, which saves the brushing link of the connection slurry in the connection process, and avoids the inconsistency of the slurry state caused by the time-consuming brushing. Therefore, the technical problems that affect the connection effect have a more prominent effect on the connection between large-size ceramic green bodies, and the operability is strong.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a method for connecting ceramic green bodies. Background technique [0002] With the development of science and technology, the application of ceramics in the field of engineering is becoming more and more extensive, and the demand for ceramic dimensions in individual fields is constantly increasing. Taking silicon carbide ceramics as an example, the high resolution requirements of the optical system indirectly lead to the development direction of large-diameter silicon carbide mirrors, and in terms of the current development status, it is difficult to manufacture large-sized monolithic silicon carbide ceramics by any process. It is very difficult, so only by choosing a reasonable connection technology can the preparation of larger-sized silicon carbide ceramic mirror bodies be realized. [0003] Taking silicon carbide ceramic green body as an example, the main connection metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/622
CPCC04B35/565C04B35/622
Inventor 崔聪聪张舸包建勋董斌超曹琪郭聪慧
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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