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A method of connecting alon ceramics with alon powder as a raw material

A technology of powder and ceramics, which is applied in the field of preparation of transparent ceramic materials, can solve the problems that ceramic connections are not easy to implement, and achieve the effects of easy processing, improved interface bonding strength, and improved connection strength

Active Publication Date: 2021-11-02
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not easy to realize the ceramic connection simply through the material diffusion between the base materials, and the application has great limitations.

Method used

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  • A method of connecting alon ceramics with alon powder as a raw material
  • A method of connecting alon ceramics with alon powder as a raw material
  • A method of connecting alon ceramics with alon powder as a raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The mixture of pure-phase AlON powder and 0.5wt.% yttrium oxide powder is used as raw material, and sintered at 1880°C for 80 minutes to obtain a transparent AlON ceramic block, which is ground with a diamond particle size of 6-8 μm Finally, it was polished with 0.5 μm diamond polishing paste, then placed in absolute ethanol solution, ultrasonically cleaned for 30 min, and dried.

[0043] Use pure phase AlON powder (see attached figure 1 ), adding 0.5wt.% of Y 2 o 3 As a sintering aid, after ball milling figure 2 The mixed powder shown. Using the dry pressing method, the mixed powder of sintering aid and AlON is pressed into a green body with a diameter of 13 mm at 25 MPa, and the green body is placed on the surface of the AlON ceramic to be connected, and another AlON transparent ceramic to be connected is placed on the On top of the green body, the sample is placed in a carbon furnace, and then a graphite block is placed on the sample, so that the pressure applie...

Embodiment 2

[0046] The difference from Example 1 is that the mixed powder of the sintering aid and AlON is directly placed on the surface of the AlON transparent ceramic to be connected. After connection, the phase composition of the dense interlayer is pure phase AlON (see attached Figure 5 ), at the interface between the intermediate layer and the substrate, grains grow across the interface (see attached Image 6 ). The flexural strength of the sample after connection is 199.4MPa (see attached Figure 7 ), reaching 86% of the AlON matrix strength after connection.

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Abstract

The invention relates to a method for connecting AlON ceramics by using AlON powder as a raw material, belonging to the field of transparent ceramic material preparation. A method for connecting AlON ceramics using AlON powder as a raw material. The mixed powder of the intermediate layer is evenly arranged between the AlON ceramic blocks and then sintered to realize the connection between the AlON ceramic blocks. The mixed powder is made of AlON powder Composed of sintering aid powder, the sintering conditions are: under the unidirectional pressure of 0.01MPa perpendicular to the plane to be connected, the temperature is raised to the holding temperature at a heating rate of 30°C / min, and then the holding temperature is the temperature for preparing the to-be-connected The sintering temperature of the AlON ceramic block is ±30° C., and the holding time is not longer than the sintering holding time for preparing the AlON ceramic block to be connected. The connecting piece obtained by using the method of the invention has high strength and light transmittance. The method is simple to operate and easy to realize industrial scale-up production.

Description

technical field [0001] The invention relates to a method for connecting AlON ceramics by using AlON powder as a raw material, belonging to the field of transparent ceramic material preparation. Background technique [0002] Aluminum oxynitride (AlON) transparent ceramics have stable physical and chemical properties, good light transmission in the wavelength range of 0.2-6.0 μm, and good comprehensive mechanical properties. It is a very potential structure-function integration chemical ceramic materials. [0003] The technical characteristics of AlON transparent ceramics that can be sintered without pressure make it have unique advantages in the preparation of large-size and special-shaped components. However, limited by the molding equipment, there is also a certain limit to the enlargement of the component size, and the large-size and special-shaped component blanks are easily deformed during the sintering process, so it is easy to cause cracks or even damage to the compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
Inventor 单英春王光徐久军韩晓光
Owner DALIAN MARITIME UNIVERSITY
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