Graphite paper is a special paper made of graphite. When graphite was just excavated from the ground, it was just like scales, and it was called natural graphite. This kind of graphite must be treated and refined before it can be used. First, the natural graphite is soaked in the mixed solution of concentrated sulfuric acid and concentrated nitric acid for a period of time, then washed with clear water and bored, and then put into a high-temperature furnace for burning. The following Furuite graphite editor introduces the preconditions for producing graphite paper:
Because the inlay between graphite evaporates rapidly after heating, at the same time, the volume of graphite expands rapidly by dozens or even hundreds of times, so a kind of wide graphite is obtained, which is called “swollen graphite”. There are many holes in the swollen graphite (left after the inlay is removed), which greatly reduces the packing density of graphite to 0.01 ~ 0.059/cm3, with light weight and excellent heat insulation. Because there are many cavities with different sizes and scraggy, they can be interlocked with each other crisscross by an external force, which is the self-adhesion of expanded graphite. According to this self-adhesion of expanded graphite, it can be processed into graphite paper.
Therefore, the prerequisite for the production of graphite paper is to have a complete set of equipment, that is, a device for preparing expanded graphite from soaking, cleaning and burning, in which there is water and fire, which may lead to explosion, so safe production is particularly important; Secondly, papermaking and roller pressing machines, the linear pressure of roller pressing should not be too high, otherwise it will affect the uniformity and strength of graphite paper, and the linear pressure is too small, which is even more impossible. Therefore, the process conditions must be accurate, and graphite paper is afraid of moisture. The finished paper should be moisture-proof packaging, remember to be waterproof and properly preserved.
Post time: Apr-17-2023