How is graphite heated different from how a resistance wire is heated?
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Which is better: power heating or thyristor-controlled heating? Advantages Disadvantages
Of course, thyristors are better; it’s similar to the control provided by two-way valves and control valves, with control valves enabling more precise adjustment. Of course, thyristors are more expensive; their function is similar to that of an inverter.
Essentially, it is all resistance heating; the differences lie only in the temperature range of use and the atmospheric requirements.