Pressure-transmitting sealing medium raw material for synthesis of cubic press, and preparation method and application thereof

Abstract

The invention discloses a pressure-transmitting sealing medium raw material for synthesis of a cubic press, and a preparation method and application thereof, and belongs to the technical field of synthesis of cubic presses. The preparation method comprises the following steps: by taking pyrophyllite as a raw material, performing impurity removal, crushing, component detection on the pyrophyllite, adding elements such as aluminum, iron and titanium into the pyrophyllite by comparing formula requirements, so as to make the component proportion of the pyrophyllite meet ideal requirements, and then performing process treatment such as screening, mixing, fermenting, pressing and drying to prepare the pressure-transmitting sealing medium block for superhard material synthesis. The pressure-transmiyyomh sealing medium block prepared according to the formula has good pressure transmission, sealing performance and heat preservation performance, the fluctuation of the use pressure and heating power of cubic press equipment can be remarkably reduced, the stability of a synthesized internal cavity is improved, the quality of a superhard material product is improved, meanwhile, the consumption of an anvil and the loss of the equipment are reduced, and the production cost of synthesizing the superhard material is reduced. The selection range of pyrophyllite mineral resources of raw materials of the pressure-transmitting sealing medium for synthesis is expanded, and the risk and purchase cost of enterprises for dealing with shortage of high-quality pyrophyllite resources are reduced.

Description

technical field [0001] The invention relates to the technical field of a pressure-transmitting sealing medium for the synthesis of a six-sided top press, in particular to a formula, preparation method and application of a pressure-transmitting sealing medium raw material for the synthesis of a six-sided top press. Background technique [0002] Synthetic diamond needs to be in a specific high-temperature and high-pressure cavity, and the pressure and temperature come from the top hammer of the six-sided top press, which requires a special pressure transmission and sealing medium, which is placed in the six-sided top press. Pressure to achieve high temperature and high pressure internal environment. The functions of the sealing medium include: sealing, heat preservation, insulation, pressure transmission, and support. [0003] The pressure transmission sealing medium for diamond synthesis generally uses pyrophyllite as a raw material. Pyrophyllite is a layered clay mineral wi...

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Problems solved by technology

[0004] On the one hand, pyrophyllite has limitations and quality differences, and usually contains a certain amount of impurities. According to different origins, the ore components have certain changes, and there are different associated minerals and impurities. The performance of pyrophyllite pressure transmission sealing materials mainly depends on the pyrophyllite ore. Mineral composition, the pyrophyllite raw stone produced in Mentougou, Beijing is the most high-quality. After simple treatment, only a small amount of minerals need to be added for production. It is also the only variety currently used in the industry. However, due to the differences in the quality of each batch of mineral sources, resulting in There are certain differences in its pressure transmission, sealing, and thermal insulation properties, which are reflected in the synthesis of specific superhard materials, that is, different batches of pyrophyllite, resulting in relatively obvious fluctuations in the pressure and power used in the synthesis, which have a greater impact on product quality. The impact of the impact, and the frequency of "blasting" accidents is also different, the hammer consumption also fluctuates in a large range, and the production cost cannot be accurately controlled

[0005] On the other hand, as one of the main raw materials, the mineral resources themselves are limited. The Beijing pyrophyllite mine has been mined for many years, and the high-quality minerals are gradually decreasing. Moreover, pyrophyllite has good physical and chemical properties, and is often used as refractory materials and ceramic raw materials. and other fields, while the scale of the diamond industry is expanding, the demand is increasing, and the price of pyrophyllite continues to increase. However, at present, the domestic source of pyrophyllite that can be directly used for superhard materials under high temperature and high pressure is seriously insufficient. Synthetic diamond enterprises are facing a resource crisis and production costs. The double pressure of the rise and the greater risk, a small cold in Beijing's pyrophyllite, the domestic superhard material industry may suffer from severe or even incurable diseases

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