Preparation method of full-pyrolysis metal coating graphite pipe

Abstract

The invention discloses a preparation method of a fully-pyrolyzed metal coating graphite pipe, which comprises the following steps: S1, firstly putting a brand-new graphite pipe or a graphite pipe which is used for a certain number of times or responds to abnormal numerical values into a 15% zirconium oxychloride solution, and then soaking the graphite pipe in the zirconium oxychloride solution for 20-28 hours, zirconium oxychloride in the zirconium oxychloride solution is hydrolyzed into zirconium oxide, the zirconium oxide is immersed into the graphite tube, and a compact zirconium carbide coating is formed through carbonization in the high-temperature atomization process. The surface of the prepared fully-pyrolyzed metal coating graphite pipe is not prone to high-temperature oxidation, carbonization reaction between carbon in the graphite pipe and other metal elements to be measured is restrained, and therefore the measurement precision and accuracy of the graphite pipe are improved, and meanwhile the problem that response values of part of high-temperature elements such as aluminum and molybdenum are too low or no response value exists is solved. In addition, the graphite pipe prepared by the method can be repeatedly prepared for multiple times, so that the use frequency of the graphite pipe is increased, and the use requirement is met.

Description

technical field [0001] The invention relates to the technical field of graphite tubes, in particular to a preparation method of a fully pyrolyzed metal-coated graphite tube. Background technique [0002] Graphite tube is a graphite product made of high-purity graphite powder through a specific process. Most of the existing graphite tube preparation methods use the atomic absorption graphite method. The graphite tube prepared by this method has a short service life and high cost. Graphite tube The problem of poor stability of memory effect is prone to occur. In addition, the repeatability of graphite tubes prepared by atomic absorption graphite method is poor. Preparation method of pyrolysis metal-coated graphite tube. SUMMARY OF THE INVENTION [0003] Based on the technical problems existing in the background art, the present invention proposes a preparation method of a fully pyrolytic metal-coated graphite tube. [0004] A preparation method of a fully pyrolyzed metal-c...

AI Technical Summary

Problems solved by technology

[0002] Graphite tubes are graphite products made of high-purity graphite powder through a specific process. Most of the existing graphite tubes are prepared by the atomic absorption graphite method. The graphite tubes prepared by this method have a short service life and high cost. It is prone to the problem of poor stability of the memory effect. In addition, the repeatability of the graphite tube prepared by the atomic absorption graphite method is poor. Preparation method of pyrolytic metal-coated graphite tube