The floating-zone refining of hafnium taking into account the impurity evaporation

  • O. Kozhevnikov National science center”Kharkov Institute of Physics and Technologies”
  • P. V’yugov National science center”Kharkov Institute of Physics and Technologies”
  • Mykola Pylypenko National science center”Kharkiv Institute of Physics and Technologies https://orcid.org/0000-0001-8113-8578
  • V. Virich National science center”Kharkiv Institute of Physics and Technologies”
Keywords: hafnium, crucibleless float-zone recrystallization, impurity, evaporation, refining

Abstract

The calculation efficiency method of hafnium refining by crucibleless float-zone recrystallization method in high vacuum taking into account the impurity evaporation is conducted. For the i-th impurity an effective distribution coefficient kэфi, an evaporation factor gi and a change in the relative concentration Cngi /Coi  after the n-th number of passes for the quasi-stationary ingot field are calculated. The efficiency of floating-zone method for purification of hafnium from metallic and gas-forming impurities was experimentally confirmed. Hafnium samples with purity 99.88 wt% were obtained. Process obtaining flowsheet of high-purity transition metal samples was developed.

Downloads

Download data is not yet available.

References

1. Пфанн В. Зонная плавка. М.: Мир, 1970, 366 с.
2. Беляев А.И. Физико-химические основы очистки металлов и полупроводниковых материалов. М.: Металлургия, 1973, 224 с.
3. Парр Н. Зонная очистка и ее техника. М.: Металлургиздат, 1963, 210 с.
4. Burton J., Prim R., Slichter W. The Distribution of Solute in Crystals Grown from the Melt // J. Chem. Phys., 1953, v.21, N 11, p. 1987-1991.
5. Бартел И., Буриг Э., Хайн К., Кухарж Л. Кристаллизация из расплавов. М.: Металлургия, 1987, 320 с.
6. Вигдорович В.Н. Очистка металлов и полупроводников кристаллизацией. М.: Металлургия, 1969, 296 с.
7. Лодиз Р., Паркер Р. Рост монокристаллов. М.: Мир, 1974, 540 с.
8. Несмеянов А.Н. Давление пара химических элементов. М.: Изд-во АН СССР, 1961, 396 с.
9. Ратников Д.Г. Бестигельная зонная плавка. М.: Металлургия, 1976, 224 с.
10. Пейзулаев Ш.И. Учет испарения примесей при зонной плавке // Изв. АН СССР. Сер. Неорг. Материалы,1967, т. 3, № 9, с. 1523-1532.
11. Диаграммы состояния двойных металлических систем. Справочник: 1-4 т. Под ред. Н.П. Лякишева М.: Машиностро-ение, гг. 1996-2000.
12. Вьюгов П.Н., Кожевников О.Е., Рудычева Т.Ю. Получение высокочистых образцов гафния методом бестигельной зонной плавки // Вопросы атомной науки и техники. Серия: Вакуум, чистые материалы, сверхпроводники. 2009, № 6, с. 19-24.
13. Кожевников О.Е., Вьюгов П.Н., Пилипенко Н.Н., Танцюра И.Г. Рафинирование гафния методом зонной плавки // Материалы докладов 2-й Международной конференции «Высокочистые металлы: получение, применения, свойства» (17-20 сентября 2013 г.). Харьков: ННЦ ХФТИ. – 2013. – с.17.
Published
2013-09-27
Cited
How to Cite
Kozhevnikov, O., V’yugov, P., Pylypenko, M., & Virich, V. (2013). The floating-zone refining of hafnium taking into account the impurity evaporation. East European Journal of Physics, (1069(4), 81-86. Retrieved from https://periodicals.karazin.ua/eejp/article/view/12908
Issue
No. 1069(4) (2013): The Journal of Kharkiv National University, Physical series "Nucleus, Particles, Fields", ISSN 2221-7754
Section
Original Papers

Copyright (c) 2013 O.E. Kozhevnikov, P.N. V’yugov, M.M. Pylypenko, V.D. Virich

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

    • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
    • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
    • Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).