New reference points in low-temperature thermometry
β Scribed by O. F. Pogorelova; M. P. Orlova; G. A. Kytin
- Publisher
- Springer US
- Year
- 1976
- Tongue
- English
- Weight
- 412 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0543-1972
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π SIMILAR VOLUMES
We report here the development of a sealed-cell lambda-point device which has been used to realize the lambda-point temperature of 4 He, T k ΒΌ 2:1768 K, to a precision of 0.04 mK with simple automatic control. With this device, one can produce and maintain T kplateaus for unlimited duration with no
that, with different cements, give expansions having a greater spread than is desired. It is hoped that the cause of this can be found and that this spread can be eliminated or reduced. MELTING POINT OF ALPHA-ALUMINA. 'The value usually quoted in the literature for the melting point of alumina (A12