On the features of crystallization methods used for the purification of aqueous solutions of cesium iodide
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
On the features of crystallization methods used for the purification of aqueous solutions of cesium iodide
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| Creator |
Cherginets, V.L.
Ponomarenko, T.V. Rebrova, T.P. Varich, A.G. Rebrov, A.L. Datsko, Yu.N. |
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| Subject |
Technology
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| Description |
Comparative analysis of CsI purification methods: mass crystallization with natural cooling (MC), low-temperature directed crystallization without stirring (LTDC/ws) and low-temperature mixed crystallization (LTMC) is presented. The MC routine possesses the highest cooling rate (6-10°C/h) and the smallest effective purification coefficients (β = 0.07-0.2) from Na, K and Rb, however the yield of the product per stage is only 60 %. The low-temperature methods are characterized by low cooling rate of ~1°C/h and higher yields of the purified product per stage (95-97 %) and β values closer to 1 than those for MC; the purification occurs especially hardly in the case of LTDC/ws (β ~ 0.9).The mentioned crystallization methods do not provide the removal of Tl which is accumulated in the product. With respect to efficiency of the purification 1 stage of MC is equivalent to 3-4 stages of LTMC or 10-11 stages of LTDC/ws and the yield of the product (CsI) is 60 %, 85-90 % and 55-70 %, respectively. The LTMC method seems the most promising for the obtaining of extra pure CsI of enhanced quality due to low enough values of β for Na, K and Rb (β = 0.46-0.6) and considerably smaller than in the case of MC rate of cooling (a degree of overcooling).
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| Date |
2019-06-19T16:47:54Z
2019-06-19T16:47:54Z 2018 |
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| Type |
Article
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| Identifier |
On the features of crystallization methods used for the purification of aqueous solutions of cesium iodide / V.L. Cherginets, T.V. Ponomarenko, T.P. Rebrova, A.G. Varich, A.L. Rebrov, Yu.N. Datsko // Functional Materials. — 2018. — Т. 25, № 3. — С. 594-600. — Бібліогр.: 5 назв. — англ.
1027-5495 DOI:https://doi.org/10.15407/fm25.03.594 http://dspace.nbuv.gov.ua/handle/123456789/157183 |
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| Language |
en
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| Relation |
Functional Materials
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| Publisher |
НТК «Інститут монокристалів» НАН України
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