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A kind of graphite mold and preparation method thereof

A technology of graphite mold and graphite emulsion, applied in metal material coating process, coating, gaseous chemical plating, etc., can solve problems such as easy breakage of tail, idle graphite equipment or waste of resources, etc.

Active Publication Date: 2018-11-09
昆明先导新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the process of preparing pyrolytic boron nitride crucible by chemical vapor deposition, the graphite mold is made according to the shape of the pyrolytic boron nitride crucible. Since the pyrolytic boron nitride crucible has a cylindrical seed groove with a small aperture, the graphite The mold has a slender tail. Because the graphite material itself is brittle and brittle, the tail is easy to break during processing, resulting in idle graphite equipment or a huge waste of resources.

Method used

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  • A kind of graphite mold and preparation method thereof

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[0025] The present invention also provides a preparation method for the above-mentioned graphite mould, comprising: coating the graphite emulsion solution on the contact surface of the mold main body (1) and the detachable part (2), and then combining the mold main body (1) with The detachable part (2) is connected by a connecting block (3), and after drying, it is polished to obtain a graphite mold; the end of the detachable part (2) not in contact with the mold main body (1) is in the shape of a thin neck.

[0026] The graphite emulsion solution is coated on the contacting surface of the mold main body (1) or the detachable part (2); wherein the coating method is a method well known to those skilled in the art, and there is no special limitation, the present invention Spraying or brushing is preferred. The mass ratio of graphite milk to solvent in the graphite milk solution is preferably 1:(1-3), more preferably 1:(2-3). The graphite emulsion in described graphite emulsion ...

Embodiment 1

[0033] see figure 1 , mix the water-based graphite emulsion and water evenly according to the mass ratio of 1:2 to obtain the water-based graphite emulsion solution; evenly paint the water-based graphite emulsion solution on the connecting contact surface between the mold main body (1) and the detachable part (2), and then Put the connecting block (3) with a diameter of 24mm into the main body of the mold (1), connect the detachable part (2) with the main body of the mold through threads and tighten it, and after the water-based graphite emulsion solution is dried, use 320 mesh, 800 mesh, 1200 mesh Grind the surface of the mold with 3M SiC sandpaper of mesh and 1500 mesh, from coarse to fine, and finally polish the surface with newspaper or the back of the sandpaper until it is bright, and obtain a graphite mold.

[0034] There are almost no connection traces at the joint between the mold main body (1) and the detachable part (2) of the graphite mold.

Embodiment 2

[0036]Mix the water-based graphite emulsion and water evenly according to the mass ratio of 1:1 to obtain the water-based graphite emulsion solution; evenly paint the water-based graphite emulsion solution on the connecting contact surface between the mold main body (1) and the detachable part (2), and then apply the The connection block (3) with a diameter of 10 mm is placed in the mold body (1), and the detachable part (2) is connected to the mold body by threads and tightened. and 1500-mesh 3M SiC sandpaper to polish the surface of the mold, the sandpaper is from coarse to fine, and finally polish the surface with newspaper or the back of the sandpaper until it is bright, to obtain a graphite mold.

[0037] No connection traces can be seen at the joint between the mold main body (1) and the detachable part (2) of the graphite mold.

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Abstract

The invention provides a graphite mold and a preparation method thereof. The preparation method comprises the following steps: graphite emulsion is respectively coated on the contacted surfaces of a mold body (1) and a detachable part (2); then, the mold body (1) and the detachable part (2) are connected through a connecting block (3); and the graphite mold is obtained after drying and polishing. Compared with the prior art, the mold body and the detachable part are connected through the connecting block to realize the replacement purpose of the detachable part; and meanwhile, as the contacted surfaces are coated with the graphite emulsion to form graphite emulsion layers for polishing, a gap in the connection place between the mold body and the detachable part can be decreased.

Description

technical field [0001] The invention belongs to the technical field of chemical vapor deposition, and in particular relates to a graphite mold and a preparation method thereof. Background technique [0002] Pyrolytic boron nitride (PBN) has high purity, good high temperature resistance, good lubrication performance and thermal stability at high temperature, and is also a good conductor of heat with insulation, acid resistance, alkali resistance, Salt-resistant and organic solvent-resistant, non-wetting and non-reactive with most molten metals and semiconductor materials at high temperatures, many advantages make it a crucible and base for the synthesis of semiconductor single crystals and III-V compounds , in-situ synthesis of GaAs (gallium arsenide), InP (indium phosphide), GaP (gallium phosphide) single crystal liquid-enclosed Czochralski (LEC) series crucibles, molecular beam epitaxy (MBE) series and vertical gradient solidification method (VGF) and other series of cruci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/458
Inventor 胡丹朱刘胡智向
Owner 昆明先导新材料科技有限责任公司
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