石墨加热器采用低电压大电流使加热器本身发热，这就是石墨加热器的加热原理

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    用石墨材料制成的电炉加热发热体部件。石墨具有优秀的导电、导热功能，在特种工业炉为电炉中常用石墨作为发热体。工业电炉中前期选用石墨电极作发热体，后选用密度高的高功率电极作发热体(熔炼石英玻璃也选用石墨电极作发热体)。

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