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Composite sealing ring for ultrahigh-pressure synthetic artificial diamond device and preparation method

A technology of artificial diamond and composite sealing ring, which is applied in the field of materials, can solve the problems that cannot be implemented on a large scale, it is difficult to control the repeatability, etc., and achieve the effect of reducing the broken rate and sufficient cooling

Active Publication Date: 2018-05-04
王国伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In early research, there was an attempt to increase friction by coating iron red powder on the surface of pyrophyllite pressure transmission medium cube (Crystal Science Growth and Technology (Part 2), p252, editor-in-chief: Zhang Kecong, Zhang Lelian, Science Press, 1997, Beijing ), but this method is difficult to control the repeatability and cannot be implemented on a large scale in industrial production and research

Method used

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  • Composite sealing ring for ultrahigh-pressure synthetic artificial diamond device and preparation method
  • Composite sealing ring for ultrahigh-pressure synthetic artificial diamond device and preparation method
  • Composite sealing ring for ultrahigh-pressure synthetic artificial diamond device and preparation method

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Effect test

Embodiment 1

[0034] A kind of preparation method of the composite sealing ring that is used for no press machine sub-ball type ultra-high pressure synthesis device (BARS), described method comprises the steps:

[0035] S1: Raw material selection and proportioning, specifically, the composition and proportioning of raw materials used in the composite sealing ring are as follows: select paddock red natural pyrophyllite blocks, crush and sieve to remove +100 micron powder particles, 800°C Roasting 1 hour; Then the obtained high-temperature baking pyrophyllite powder, silica pyroxene fiber powder, commercially available metal surface thermal spraying epoxy resin powder are taken by mass ratio 85%: 10%: 5%, and the total mass is 1000 grams; Chopped silica pyroxene micro-powder has an aspect ratio of 7:1-10:1 and a diameter of 10-20 microns. The epoxy resin is commercially available E12 epoxy resin powder with a particle size (D50) of 80 mesh.

[0036] S2: Ingredients and mixing, specifically, w...

Embodiment 2

[0042] A kind of preparation method of the composite sealing ring that is used for no press machine sub-ball type ultra-high pressure synthesis device (BARS), described method comprises the steps:

[0043] S1: Selection and proportioning of raw materials, specifically, the composition and proportioning of raw materials used in the composite sealing ring are as follows: select paddock red natural pyrophyllite blocks, crush and sieve to remove +100 micron and -18 micron powder Particles were roasted at 800°C for 1 hour; then the obtained high-temperature baked pyrophyllite powder, silicon pyroxene fiber powder, and commercially available epoxy resin powder for thermal spraying on metal surfaces were weighed in a mass ratio of 80%:15%:5%. , the total mass is 1000 grams; the aspect ratio of silica pyroxene fiber powder is 5:1-7:1, and the diameter is 10-20 microns. The epoxy resin powder adopts commercially available E12 epoxy resin powder, and the particle size (D50) is 300 head;...

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Abstract

The invention relates to a composite sealing ring for an ultrahigh-pressure synthetic artificial diamond device and a preparation method. The method comprises the following steps: the composite sealing ring is prepared from the following raw materials by weight percent: 60 to 90 percent of high-temperature baked pyrophyllite powder, 5 to 30 percent of chopped wollastonite fiber powder, and 5 to 20percent of epoxy resin powder; weighing the powder according to the proportion, adding an appropriate amount of demolding agent and surfactant, and uniformly mixing in a three-dimensional mixing machine to obtain a mixture; placing the mixture into a sealing material forming mold, and dry pressing to form a biscuit; placing the biscuit into a baking oven, setting a baking temperature, preservingthe heat for a certain time, and baking and forming; and cooling and storing for standby use. The wollastonite and epoxy resin are added into the pyrophyllite to prepare the composite sealing ring. The friction coefficient of the material can be adjusted by adjusting the content of the wollastonite fiber in the material; and the pressure transferring efficiency at 20GPa can be increased to 40 percent. By adding the epoxy resin, the material has the waterproof characteristic.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a sealing material of an ultra-high pressure synthetic synthetic diamond device. Background technique [0002] When using ultra-high pressure equipment such as two-sided top, six-sided top, BARS (pressless ball type ultra-high pressure synthesis device) to grow gem-grade synthetic diamond single crystal, the sealing edge is at 5GPa ( Atmospheric pressure) or higher synthesis pressure in the high temperature-high pressure synthesis process plays a very important role: the sealing edge and the inner surface of the anvil together constitute a closed high temperature-high pressure synthesis cavity, ensuring that the high pressure during the high temperature-high pressure synthesis process The material in the cavity will not be ejected, and vicious accidents such as blasting will occur; in addition, the sealing edge also has an insulating effect t...

Claims

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Application Information

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IPC IPC(8): C04B26/14C04B20/04
CPCC04B20/04C04B26/14C04B14/041C04B14/465
Inventor 曹大呼龙政鑫李培培
Owner 王国伟
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