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The graphite heater has three kinds of common shape, cylindrical, cup, spiral, the vast majority of the heater is a cylinder. Made of high purity graphite heater with carbon content of more than 99.9%; the graphite bowl wall thickness is generally 3 mm - 6 mm; after a long period of practice, the effective length of the quartz crucible heater is 1.6 times the height to 1.8 times. Now more and more of the graphite heater used to heat treating and brazing furnace, thermal field generally used coarse graphite in the fine structure of the bottom prop up the market, the thermal insulation cover, upper cover and a lower cover; imported isostatic graphite as a heater. The heating principle of…
The high purity graphite has been applied widely in the industry. It can be processed into various parts such as the graphite grid in vacuum food ; vacuum furnace, single crystal furnace, graphite crucible in electric furnace, the graphite vessel, the heater, the heat shield; the smelting vessel of noble metal se alloy , casting mould; the graphite mold of pressing hard alloy ; electric spark machining graphite; the wear-resistant and heat-resistant shaft; a variety of high temperature heating element. It can be processed according to customer samples and drawings. The production process of high pure graphite and common graphite is roughly the same, but it has the following characteristics: We must select the raw material in low ash content…
Graphite powder is a chemical reaction sensitive material, in the different environment its resistivity will change inside, his resistance values will change, but graphite powder is one of non metal conductive material is very good, as long as the insulating objects ensure graphite powder uninterrupted, like a thin line that will electrify, however, how much the resistance value is, this numerical didn't an accurate number, because the thickness of the graphite powder, used in different materials and environmental graphite resistor values will be different. Because of its special structure, graphite has the following special properties. 1) High temperature resistant: Graphite melting point is 3850 c, the boiling point of 4250 c, even the ultra high temperature arc ignition, weight loss…
