Pyrolytic Deposition Process Research And Application Of Graphite Gate Blank

This paper discusses property of the pyrolytic graphite firstly, analyzes its application on the high power and supper high power's electric tubes and points out the prevalence of the pyrolytic graphite used for grid's material. Then through experiment and discussion, this paper has obtained the scientific depositional technology of the pyrolytic graphite grid's rough and accomplished this subject.As a engineer, I have researched the technology of the deposition of the pyrolytic graphite grid's rough in detail and deeply, in order that Xuguang Electric Ltd. Co. achieves the producing from the deposition of the pyrolytic graphite grid's rough to grid .In this research, Propane and Nitrogen gases has been used in the deposition of the pyrolytic graphite grid's rough at about 1800℃and in vacuum. In the process of the deposition of the pyrolytic graphite grid's rough, experiment which adopts same discharge and proportion of those gases at different temperature has been done, the test which adopts different discharge and proportion of those gases at same temperature to deposit grid's rough has also been done. At same time, the test which adopts different dilute gases at same technological condition to deposit the grid's rough has been done. In order to obtaining the grid's rough which thickness is able to use, the test has been done at different temperature and depositional time. X-ray diffraction analysis and density analysis and crystal structure analysis have been adopted to analyze the grid's rough. Through large numbers of experiments and practice, technological condition of gas discharge and depositional temperature and depositional pressure and depositional time of all kinds of the pyrolytic grid's roughs has been gained. Now we can deposit small and big grid's roughs successfully. These roughs has fulfilled high power and super high power electric...