Graphite Resistance Heater

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Product description

The function of this graphite resistance heater is to use graphite as the heating element, utilize the Joule heat generated when current passes through, achieve high-temperature heating in vacuum or protective atmosphere, and transfer heat to the workpiece through thermal radiation. And its application scenarios often manifest in high temperature, strict atmosphere, and demanding cleanliness requirements, such as monocrystalline silicon furnaces and polycrystalline silicon thermal field systems in the photovoltaic and semiconductor fields, high-temperature graphitization treatment of carbon/carbon composite materials and carbon fiber insulation materials, as well as sintering and vacuum heat treatment of high-temperature alloys and refractory metals.

The graphite heater using isostatic pressed graphite as the substrate solves many pain points faced in the above scenarios. The processing technology of isostatic pressing ensures that the electrical resistivity and thermal expansion behavior of the heating element are highly consistent throughout, resulting in uniform heating distribution and greatly reducing the problems of local overheating and thermal stress concentration. At the same time, the heater material also endows it with excellent thermal shock resistance, making it less prone to cracking during rapid cooling and heating cycles, which is crucial for vacuum furnaces and single crystal furnaces that frequently start and stop or have large temperature fluctuations during process cycles.

Meanwhile, in the above operating conditions, the heater is not only a heat source, but also a key thermal field component that determines the uniformity of furnace temperature, product purity, and continuous operation cycle of equipment. In terms of high temperature stability and purity, isostatic graphite heaters have irreplaceable advantages.

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