Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 37, Issue 1, Pages 69-74Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.07.019
Keywords
Powders: solid state reaction; Interfaces; Diffusion; Si3N4
Categories
Funding
- State Program Investment for the Future [ANR-10-ITE-0003]
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Photovoltaic silicon is currently grown in silica crucibles coated with an oxidized silicon nitride powder, which acts as an interface releasing agent between the silicon and the crucible. A series of experiments was performed to study the reactions between coating components under high vacuum, varying the temperature, the holding time and the oxygen content in the coating. The results are discussed with the help of a simple analytical model taking into account the diffusive transport of reaction species from the inside of the porous coating to its surface and then their evaporation into the vapour phase. (C) 2016 Elsevier Ltd. All rights reserved.
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