The thermal conductivity and high temperature resistance of graphite crucibles are relatively good. When used at high temperatures, the coefficient of thermal expansion is small, and it has a certain strain resistance ability for rapid heating and cooling. It has strong corrosion resistance to acid-base solutions and good chemical stability. Widely used in the metallurgical, casting, mechanical, chemical and other industrial sectors for the smelting of alloy tool steel and non-ferrous metals and their alloys. And it has good technical and economic effects.
In the case of ultra-high temperature induction heating, the electrodes used in high-temperature oxidation environments will undergo partial sublimation oxidation due to high-temperature arcs, resulting in continuous consumption. Even if it is damaged or damaged, the loss rate will reach 40-60%. The high-temperature sealing coating developed and produced for many years is mainly used for oxidation protection of electrodes, crucibles, and parts in high-temperature environments, delaying oxidation rate, increasing material strength, and extending service life. Effectively reduce the probability of electrode breakage, breakage, and detachment.
After the graphite crucible is coated with antioxidant paint, the high-temperature ZS-1011 graphite transition coating liquid can penetrate into the pores of the crucible, expelling residual air inside the crucible and forming pores. The surface of a graphite crucible. Antioxidant protective film. It is precisely this protective film that can effectively isolate air from direct contact with the crucible and cause oxidation reactions. The crucible impregnated with antioxidant coating will not crack or fall off under high temperature changes, effectively delaying oxidation and prolonging the service life of graphite crucibles.
Graphite crucible antioxidant coating, water-based inorganic environmentally friendly coating, does not produce volatile substances at high temperatures and normal temperatures. The high-temperature sealing coating itself is acid and alkali resistant and does not react with the quenching medium. It can effectively protect the crucible from chemical reactions at high temperatures and prevent the high-temperature oxidation rate of the crucible from reaching over 95%.