There are weak van der Waals forces between layers in the structure of graphite, and these interactions are disrupted under high temperature conditions, leading to interlayer detachment of graphite.

During the operation of graphite heaters, graphite undergoes oxidation reactions. High temperature will accelerate this reaction, produce more oxides, and lead to graphite loss.

Under high temperature conditions, the surface of the heater reacts with oxygen in the air to generate CO and CO2, gradually corroding the surface of the heater and causing it to powder.

Under long-term high temperature conditions, the lifespan of the heater will be shortened, and both the surface and interior will gradually decay, ultimately leading to a decrease in the performance of the heater and even its inability to function.

The working temperature of the heater is too high, exceeding the thermal stress range borne by graphite, which can lead to a decrease in the tensile strength of the heater, cracking and detachment.

In summary, reasonable working temperature and service life management are the key to avoiding problems with graphite heaters under high temperature conditions. It is necessary to control the working temperature of the heater within a safe range and replace it according to the usage cycle specified in the product manual to ensure the normal operation of the heater.