Our graphite furnaces are capable of operating at °C on a continuous basis in inert gas, or °C in a vacuum. Graphite is a desirable material in various thermal applications due to its thermal properties and chemical resistance.
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Graphite heating elements are manufactured from a high purity carbon composite providing excellent temperature uniformity, longevity, mechanical strength and repeatability. Our heater designs use rounded edges and proper gap spacing to minimize gas ionization at elevated temperatures, increasing life expectancy and maximum obtainable temperatures. Our graphite heating elements use power connections with a unique tapered fit, instead of threads with nuts. This taper simplifies heating element removal and installation.
Our graphite insulation materials have excellent thermal insulation properties to minimize heat loss and have high thermal stability for longevity. Graphite insulation surrounds the heater and is manufactured from rigid graphite fiber board or graphite felt. Insulation thickness varies based on maximum desired operating temperatures and hot zone size.
A large number of our furnaces are available with a graphite hot zone. We offer numerous designs and supply spare graphite parts for all graphite hot zones as well as other graphite parts such as rods, pins, bolts, nuts and fixtures.
The maximum working temperature of graphite can vary depending on the specific application and conditions. In general, graphite can withstand very high temperatures.
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For graphite crucibles used in furnaces and high heat processes, the maximum temperature can go as high as °F (°C). However, it is important to note that graphite is oxygen sensitive and should not be exposed to air at elevated temperatures. Oxidation in air starts around 932°F (500°C) and can result in a loss of mass per day. Repeated exposure to air at elevated temperatures can lead to structural failure.
When used in a vacuum or at lower pressures, graphite can be operated at even higher temperatures. At pressures down to 10-2 torr, graphite can be used up to °F (°C) element temperature. Further lowering the pressure to 10-4 torr, graphite is typically operated up to °F (°C) element temperature.
In specific applications such as graphite heating elements, the maximum temperature can be around °C (°F) in inert gas or °C (°F) in a vacuum. Graphite heating elements are designed with thicker cross-sectional areas to ensure mechanical stability and proper power rating.
It is worth mentioning that the maximum temperature of graphite can also depend on the type of furnace or equipment being used. For example, a graphite tube furnace can have a maximum operating temperature of up to °C (°F) and is commonly used for applications such as annealing, brazing, ceramic firing, degassing, graphitization, carbonization, melting, and sintering.
Overall, graphite is a desirable material for high-temperature applications due to its thermal properties, chemical resistance, and ability to conduct electricity and heat efficiently.
Looking for high-temperature laboratory equipment? Look no further than KINTEK! Our graphite crucibles and heating elements can withstand temperatures up to °F and °C respectively. With superior oxygen control, our products ensure efficient and reliable performance. Get in touch with us today for all your high-temperature laboratory needs!
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