Cryocrystal phase transitions applied as temperature standards
International temperature scales define several fixed points, which temperature values are determined with a very high precision. Some of them, which are in a low-temperature range, are called gaseous fixed points because the reference substances under a normal condition — in a room-temperature rang...
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| Опубліковано в: : | Физика низких температур |
|---|---|
| Дата: | 2009 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/117130 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Cryocrystal phase transitions applied as temperature standards / A. Szmyrka-Grzebyk, A. Kowal // Физика низких температур. — 2009. — Т. 35, № 4. — С. 427-432. — Бібліогр.: 19 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-117130 |
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Szmyrka-Grzebyk, A. Kowal, A. 2017-05-20T07:08:13Z 2017-05-20T07:08:13Z 2009 Cryocrystal phase transitions applied as temperature standards / A. Szmyrka-Grzebyk, A. Kowal // Физика низких температур. — 2009. — Т. 35, № 4. — С. 427-432. — Бібліогр.: 19 назв. — англ. 0132-6414 PACS: 64.60.Ej, 64.75.–g, 67.90.+z https://nasplib.isofts.kiev.ua/handle/123456789/117130 International temperature scales define several fixed points, which temperature values are determined with a very high precision. Some of them, which are in a low-temperature range, are called gaseous fixed points because the reference substances under a normal condition — in a room-temperature range — appear in a gaseous state. These reference substances are called by physicists cryocrystals or quantum crystals when occurring in a low temperature in a solid state. The substances play an important role in a standard thermometry. The triple point of argon, oxygen, neon and hydrogen are primary fixed points of the International Temperature Scale of 1990 (ITS-90) [1]. The triple points of nitrogen, methane and carbon dioxide are secondary fixed points of the scale [2]. Also, the solid–solid phase transitions in the cryocrystals are secondary fixed points of the scale. The highest accuracy methods of measurements applied in a standard thermometry enable the determination with a very small uncertainty of the phase transition temperatures, its reproducibility and stability. The reproducibility and stability of the transition temperature are the most important factors deciding about usefulness of these points in thermometry. Using the highest accuracy methods, better than 1 mK, which at present are used in metrology only can give a new information about nature and properties of investigated substances important also for physicists. The work was partially performed with financial support from the Ministry of Sciences and High Education in Poland under project No. 505312333. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур 7th International Conference on Cryocrystals and Quantum Crystals Cryocrystal phase transitions applied as temperature standards Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Cryocrystal phase transitions applied as temperature standards |
| spellingShingle |
Cryocrystal phase transitions applied as temperature standards Szmyrka-Grzebyk, A. Kowal, A. 7th International Conference on Cryocrystals and Quantum Crystals |
| title_short |
Cryocrystal phase transitions applied as temperature standards |
| title_full |
Cryocrystal phase transitions applied as temperature standards |
| title_fullStr |
Cryocrystal phase transitions applied as temperature standards |
| title_full_unstemmed |
Cryocrystal phase transitions applied as temperature standards |
| title_sort |
cryocrystal phase transitions applied as temperature standards |
| author |
Szmyrka-Grzebyk, A. Kowal, A. |
| author_facet |
Szmyrka-Grzebyk, A. Kowal, A. |
| topic |
7th International Conference on Cryocrystals and Quantum Crystals |
| topic_facet |
7th International Conference on Cryocrystals and Quantum Crystals |
| publishDate |
2009 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
International temperature scales define several fixed points, which temperature values are determined with a very high precision. Some of them, which are in a low-temperature range, are called gaseous fixed points because the reference substances under a normal condition — in a room-temperature range — appear in a gaseous state. These reference substances are called by physicists cryocrystals or quantum crystals when occurring in a low temperature in a solid state. The substances play an important role in a standard thermometry. The triple point of argon, oxygen, neon and hydrogen are primary fixed points of the International Temperature Scale of 1990 (ITS-90) [1]. The triple points of nitrogen, methane and carbon dioxide are secondary fixed points of the scale [2]. Also, the solid–solid phase transitions in the cryocrystals are secondary fixed points of the scale. The highest accuracy methods of measurements applied in a standard thermometry enable the determination with a very small uncertainty of the phase transition temperatures, its reproducibility and stability. The reproducibility and stability of the transition temperature are the most important factors deciding about usefulness of these points in thermometry. Using the highest accuracy methods, better than 1 mK, which at present are used in metrology only can give a new information about nature and properties of investigated substances important also for physicists.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/117130 |
| citation_txt |
Cryocrystal phase transitions applied as temperature standards / A. Szmyrka-Grzebyk, A. Kowal // Физика низких температур. — 2009. — Т. 35, № 4. — С. 427-432. — Бібліогр.: 19 назв. — англ. |
| work_keys_str_mv |
AT szmyrkagrzebyka cryocrystalphasetransitionsappliedastemperaturestandards AT kowala cryocrystalphasetransitionsappliedastemperaturestandards |
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2025-12-07T19:27:37Z |
| last_indexed |
2025-12-07T19:27:37Z |
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1850878887044579328 |