| 摘要 |
An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially increases in a linear manner within a temperature range between an ambient temperature and 1500 DEG C. and can be used for a temperature control. The PCT resistance is provided with an oxidation resistant metallization or is gas-tightly enveloped by a jacket ( 2, 3, 12 ), a space between the jacket ( 2, 3, 12 ) and the PCT resistance ( 1,13 ) being filled with a powder or granules ( 14 ) which remove an important gas amount from the space.
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