Purification of tellurium to nearly 7N purity

Zaiour, A.; Zahraman, K.; Roumié, M.; Charara, Jamal; Fawaz, A.; Lmai, F.; Hage‐Ali, M.

doi:10.1016/j.mseb.2006.03.029

Cited by 42 publications

(12 citation statements)

References 14 publications

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“…It needs complex construction and expensive pumps to obtain ultra-vacuum. In some exceptional cases such as Te, it makes though sense to combine both methodologies of distillation and zone refining to ascend the purity stepwise (once to 5N and then to 7N) [6]. The refined metals through zone refining are typically in the form of polycrystalline structures [10].…”

Section: Introductionmentioning

confidence: 99%

Production of High Purity Metals: A Review on Zone Refining Process

Zhang¹,

Friedrich²,

Friedrich³

2018

JCPT

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Purification is a primary application of zone melting, in which the improvement of efficiency, production yield and minimum achievable impurity level are always the research focus due to the increasing demand for high purity metals. This paper has systematically outlined the whole development of related research on zone refining of metals including basic theories, variants of zone refining, parametric optimization, numerical models, and high purity analytical methods. The collection of this information could be of good value to improve the refining efficiency and the production of high purity metals by zone refining.

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Section: Introductionmentioning

confidence: 99%

Production of High Purity Metals: A Review on Zone Refining Process

Zhang¹,

Friedrich²,

Friedrich³

2018

JCPT

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“…Наиболее распространенными методами получения высокочисто-го теллура являются вакуумная дистилляция и зонная плавка [9,10]. Теория этих процессов хорошо описана в работе [11]. Проблема производства значительных количеств теллура с чистотой выше 6N остается актуальной задачей.…”

Section: Introductionunclassified

“…Проблема производства значительных количеств теллура с чистотой выше 6N остается актуальной задачей. Одной из основных примесей в коммерчески доступном техническом теллуре является селен [11,12]. Известно, что паровая фаза над сплавами системы Se-Te имеет сложный состав при температурах ~800 К, при которых обычно проводят вакуумную дистилляцию теллура [11,13].…”

Section: Introductionunclassified

Deep tellurium purification for electronic and photonic materials

Grishechkin

Mozhevitina

Khomyakov

et al. 2016

Izv. vysš. učebn. zaved., Mater. èlektron. teh.

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The regularities of impurity distribution between the distillate and the still as well as the spatial distribution of impurities along the distillate length have been studied. We conclude that some impurities such as s−metals, Zn, Ni, V and rare metals distribute uniformly along the distillate length (20 cm). Contrarily, Se tends to concentrate in the distant (from the still) region of distillate with more than one order of magnitude higher concentration compared to the nearest region.

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“…To meet the stringent requirement of ultra-high pure materials, different crystal growth techniques were adopted, among which, zone refining technique was extensively and most successfully used for the ultra-purification of materials [2][3][4][5][6][7][8][9][10][11][12]. Zone refining, as described by Pfann, is used to reduce impurity density in materials to extremely low levels by establishing a molten zone in the material ingot, which is moved from one end of the same to the other end one or more times at controlled translation rate and temperature [13].…”

Section: Introductionmentioning

confidence: 99%