A synthetic diamond graphite tube heating structure

Abstract

The invention relates to an artificial diamond graphite-pipe type heating structure which is used for heating a composite column. The artificial diamond graphite-pipe type heating structure comprises a pyrophyllite block, steel caps, graphite sheets, a graphite pipe, a ceramic cup and a steel cup, wherein the pyrophyllite block is located in an outermost layer; the steel caps are arranged at the top and the bottom of the pyrophyllite block, respectively; the bottoms of the steel caps prop against the graphite sheets; the steel cup, the ceramic cup and the graphite pipe wrap the composite column in sequence; the graphite sheets are located at the upper end and the lower end of the graphite pipe; the graphite pipe is not provided with a connector. The artificial diamond graphite-pipe type heating structure provided by the invention uses the pressed graphite pipe with high density and uniformity and without a connector, so that the uniform heating and the high heating speed can be realized when the composite column is heated; the artificial diamond graphite-pipe type heating structure is beneficial to growth of diamonds.

Description

technical field [0001] The invention relates to a heating device, in particular to an artificial diamond graphite tube heating structure, which belongs to the technical field of artificial diamond heating equipment. Background technique [0002] At present, there are two main heating structures for synthetic diamond synthesis columns: one is to use graphite strips for heating, however, due to the small heating area of ​​graphite strips and slow heating speed, the production efficiency is low; the other is to use metal tubes for heating However, since the edge of the metal tube has an interface, the resistance at the interface is relatively large, resulting in uneven heating of the metal tube, which easily leads to scrapping of the synthesis column. [0003] Therefore, in order to solve the above technical problems, it is indeed necessary to provide an artificial diamond graphite tube heating structure with an improved structure to overcome the defects in the prior art. Con...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two main heating structures for synthetic diamond synthesis columns: one is to use graphite strips for heating, however, due to the small heating area of ​​graphite strips and slow heating speed, the production efficiency is low; the other is to use metal tubes for heating However, since the edge of the metal tube has an interface, the resistance at the interface is relatively large, which causes uneven heating of the metal tube, which easily leads to the scrapping of the synthesis column

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