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Synthesis method for diamond and dolomite liner tube for synthesizing diamond

A technology for synthesizing diamond and dolomite, which is applied in the field of dolomite liners, can solve problems affecting the quality of diamond synthesis, achieve high-quality product rate, and improve the effect of high-quality product rate

Inactive Publication Date: 2017-09-15
HENAN HUANGHE WHIRLWIND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the existence of molten water glass, dolomite decomposes to produce carbon dioxide, which affects the quality of diamond synthesis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Get 9300 grams of dolomite powder, add 700 grams of water glass, mix uniformly, granulate and press to become the first dolomite liner for synthetic diamond.

[0018] The XRD results after synthesis showed the presence of CaSiO3, indicating that dolomite was decomposed during the high-temperature and high-pressure synthesis process, and the high-quality ratio of the synthesized diamond was 68%.

Embodiment 2

[0020] Get 9400 grams of dolomite powder and add 100 grams of layered mica and 500 grams of PVA aqueous solution (concentration is 6%), mix and granulate and then press to become the second dolomite liner for synthetic diamond.

[0021] The post-synthesis XRD results show that the dolomite has no decomposition, the synthesis pressure is 86MPa, and the diamond quality ratio is 75%.

Embodiment 3

[0023] Get 9300 grams of dolomite powder and add 200 grams of layered mica and 500 g of PVA aqueous solution (concentration is 6%), mix and granulate and press into the third dolomite liner for synthetic diamond.

[0024] The post-synthesis XRD results show that the dolomite has no decomposition, the synthesis pressure is 81MPa, and the diamond quality ratio is 77%.

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PUM

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Abstract

The invention relates to the field of synthesis, and relates to a synthesis method for diamond and a dolomite liner tube for synthesizing the diamond. The synthesis method for diamond comprises the steps of placing graphite into the dolomite liner tube, placing the dolomite liner tube into pyrophyllite blocks, placing the pyrophyllite blocks on a diamond synthesis machine and synthesizing under the condition of high temperature and high pressure; and is characterized in that the dolomite liner tube is formed by the following steps of weighing 94-85 parts of dolomite powder, 5-10 parts of layered mica, and 5-15 parts of 5-7% polyvinyl alcohol water solution, pelleting after mixing uniformly, and at last pressing to form the dolomite liner tube. The production method of the diamond and the dolomite liner tube for producing the diamond have the advantages of being beneficial to synthesis of the product and improving a high quality product rate.

Description

technical field [0001] The invention relates to the field of diamond synthesis, in particular to a method for synthesizing diamond and a dolomite liner for synthesizing diamond. Background technique [0002] Diamond is synthesized by placing graphite in a dolomite liner, placing the dolomite liner in a pyrophyllite block, and placing the pyrophyllite block on a diamond synthesis machine under high temperature and high pressure. [0003] Graphite is placed in the dolomite liner to improve the internal thermal insulation of the synthetic block and avoid a large amount of heat loss, so as to reduce the heat loss of the synthetic cavity and improve the uniformity of the temperature field of the synthetic cavity, thereby achieving the goal of improving the output and quality of diamonds. Effect. [0004] In the prior art, the dolomite liner is formed by adding a certain proportion of water glass to dolomite powder as a binder to realize compression molding. The dolomite liner pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06C04B26/04
CPCB01J3/002B01J3/065C04B26/04C04B14/26C04B14/042
Inventor 胡军恒李建华吴旭阳王适胡其军刘拾霞朱心冰
Owner HENAN HUANGHE WHIRLWIND CO LTD