• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • View Item
  •   Home
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

The Kinetics of Boron Transfer in Slag Refining of Silicon

Krystad, Egil; Tang, Kai; Tranell, Gabriella
Journal article, Peer reviewed
Published version
View/Open
The+Kinetics+of+Boron+Transfer+in+Slag+Refining+of+Silicon.pdf (Locked)
URI
http://hdl.handle.net/11250/2473552
Date
2012
Metadata
Show full item record
Collections
  • Institutt for materialteknologi [1572]
  • Publikasjoner fra CRIStin - NTNU [19946]
Original version
JOM: The Member Journal of TMS. 2012, 64 (8), 968-972.   10.1007/s11837-012-0382-5
Abstract
Slag refining is one of the few metallurgical methods for efficient removal of boron from silicon. In industrial slag refining for production of silicon for photovoltaic applications, the relationship between the slag composition and the mass transfer rate of boron from metal to slag is of great importance. The kinetics of boron removal from liquid silicon during slag refining has been investigated in the present work by means of several small-scale experimental series at temperatures between 1,600°C and 1,650°C. Slag and metal, in batch weights of 30 g, were heated together in a graphite crucible placed in a resistance-heated tube furnace. The slags were produced from powdered SiO2, CaO, and MgO. The oxides applied were of high purity. Experiments were carried out at slag-to-metal ratios of 1 or 2, where the silicon initially contained approximately 250 ppm boron. Metal–slag mass transfer coefficients were calculated based on chemical analyses of the silicon and ranged from 1.7 μm/s for slag consisting of equal amounts of SiO2 and CaO by weight, to 4.3 μm/s for a 40%–40%–20% SiO2-CaO-MgO slag.
Publisher
Springer Verlag
Journal
JOM: The Member Journal of TMS

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit