Effect of multi-pass, zone length and translation rate on impurity segregation during zone refining of tellurium

Autor:	T.L. Prakash, J. V. Rao, N.R. Munirathnam, D.S. Prasad
Rok vydání:	2006
Předmět:	Zone melting Materials science Mechanical Engineering Analytical chemistry chemistry.chemical_element Condensed Matter Physics Translation (geometry) Zone size Partition coefficient Crystallography chemistry Mechanics of Materials Impurity General Materials Science Tellurium Selenium
Zdroj:	Materials Letters. 60:1875-1879
ISSN:	0167-577X
Popis:	The efficiency of zone refining as a function of number of zone passes; zone length and translation rate was studied. Multi-pass, depending on the initial concentration of impurity, leads to a significant segregation and major trace impurities in tellurium such as Fe, Ni, Bi, Sb, Sn and Zn were reduced effectively after quadruple zone refining. It was found that for a tellurium material of different distribution coefficient (K) values, the constant zone size of 3 to 6 cm is optimum for all of them. Good segregation behaviour was observed at a minimum translation rate of 30 mm/h and impurity concentration has increased at higher translation rate. Also, a detailed account on the reduction of selenium, which is a major impurity in tellurium, is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3fb0a5f749f9b6b1b1aecdee0ffcc819 https://doi.org/10.1016/j.matlet.2005.12.041 Zobrazit plný text záznamu Full Text from ScienceDirect