| 摘要 |
The device, which can be used in high temperature ovens, comprises a resistive heating element 12 surrounded by a tubular sheath 10 made from a ceramic material resisting corrosion. The sheath delimits, around the heating element, a sealed chamber occupied by a protective gas. The heating element 12 is made from graphite protected against oxidation by an atmosphere containing carbon monoxide formed from the heating element when the device is first implemented. <IMAGE>
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