Blar i Institutt for materialteknologi på forfatter "Ciftja, Arjan"
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The effect of preliminary heat treatment on the durability of reaction bonded silicon nitride crucibles for solar cells applications
Hendawi, Rania Tayseer Atieh; Ciftja, Arjan; Stokkan, Gaute; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2020)Silicon nitride crucibles have the potential to replace silica crucibles and reduce the cost of silicon crystallization because of their reusability potential. Till date, crucibles’ heat treatment before each use is a ... -
Kinetics of silicon nitride coatings degradation and its influence on liquid infiltration in PV silicon crystallization processes
Hendawi, Rania Tayseer; Ciftja, Arjan; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2021)Safe implementation of reusable crucibles in the silicon PV industry requires a thorough understanding of the reactions in the system to avoid liquid infiltration and crucible failure at high temperatures. Typically, an ... -
Microstructure and electrical properties of multi- crystalline silicon ingots made in silicon nitride crucibles
Hendawi, Rania; Søndenå, Rune; Ciftja, Arjan; Stokkan, Gaute; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2022)Silicon nitride is a more sustainable crucible material than silica, due to the larger potential for re-use. In this work, two directionally solidified high-performance multi-crystalline silicon (HPMC-Si) ingots have been ... -
Recycling of the Rare Earth Oxides from Spent Rechargeable Batteries Using Waste Metallurgical Slags
Tang, Kai; Ciftja, Arjan; Eijk, Casper van der; Wilson, Shawn C.; Tranell, Gabriella (Journal article; Peer reviewed, 2013)A high temperature process for recycling spent nickel-metal hydride rechargeable batteries has been recently developed at SINTEF/NTNU. The spent battery modules were first frozen with liquid nitrogen for the de-activation ... -
Solar silicon refining; Inclusions, settling, filtration, wetting
Ciftja, Arjan (Doktoravhandlinger ved NTNU, 1503-8181; 2009:103, Doctoral thesis, 2009)The main objective of the present work is the removal of inclusions from silicon scrap and metallurgical grade silicon. To reach this goal, two various routes are investigated. First, settling of SiC particles from molten ...