Graphite type atomic oxygen density sensor

Abstract

The invention relates to a graphite type atomic oxygen density sensor, which belongs to the technical field of gas detection. The graphite type atomic oxygen density sensor comprises a base, an insulation pad, a ceramic substrate, a graphite film, a cover plate, a leading wire and a gold electrode, wherein the insulation pad is arranged in the base; the ceramic substrate is arranged above the insulation pad; the graphite film and the electrode are deposited on the ceramic substrate; and the graphite film is connected with the electrode. The graphite type atomic oxygen density sensor is prepared by the following steps: preparing the gold electrode on the ceramic substrate, and then preparing the graphite film in the middle of the gold electrode to form a graphite film resistor; forming a through hole of which the size is the same as that of the graphite film on the cover plate and the insulation pad; and putting the ceramic substrate on the base, tightly connecting the leading wire to the gold electrode, then covering the insulation pad and the cover plate, and screwing down the cover plate on the base by using screws to form the graphite type atomic oxygen density sensor. The graphite type atomic oxygen density sensor can be used for detecting the atomic oxygen density of a ground simulation device and the atomic oxygen density in a space environment.

Description

technical field [0001] This patent relates to a graphite-type atomic oxygen density sensor. The sensor can be used for ground simulation equipment and atomic oxygen density detection in the environment of low earth orbit, and belongs to the field of gas detection. Background technique [0002] In the low earth orbit of 200km-700km, atomic oxygen is the main component of the remnant atmosphere, and its density is 10 9 ~10 5 atoms / cm 3 about. Although the density is not very high, due to the high-speed flight (7.8km / s) of the spacecraft, the number of atomic oxygen hitting the unit surface area of ​​the spacecraft per unit time reaches 10 13 ~10 15 atoms / cm 2 s, the number is quite astonishing. [0003] Atomic oxygen is a very strong oxidant with extremely active chemical properties, which can change the mechanical, optical, and electrical properties of spacecraft surface materials, thereby affecting the service life of materials, and is the main factor for the degradat...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of other atomic oxygen density sensors, such as complex structure, slow response speed, and inability to measure continuously, and propose a graphite-type atomic oxygen density sensor for continuous detection of atomic oxygen in ground simulation equipment and space environments density

Images