| 摘要 |
A fixed-point cell is provided which can provide a fixed-point in a wide temperature range by changing the fixed-point material. During the use of the fixed-point cell, the fixed-point material can be prevented from being contaminated, and the crucible of the cell can be prevented from being cracked. The fixed-point cell includes: the crucible composed of carbon; the fixed-point material enclosed in the crucible and composed of one of a metal, a eutectic of a metal and carbon, and a eutectic of a metal carbide and carbon; and a woven fabric of graphite fibers containing 10 ppm or lower of impurities and interposed between the crucible and the fixed-point material.
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