Abstract
Abstract The chemical transport of CoCr 2 O 4 and NiCr 2 O 4 with chlorine as a transport agent has been investigated. On the basis of thermodynamic analysis of the transport reactions at 800–1500 K it has been established that the gas phase should contain Cl 2 , CrO 2 Cl 2 and CoCl 2 during transport of CoCr 2 O 4 , while Cl 2 , CrO 2 Cl 2 and NiCl 2 should be present when NiCr 2 O 4 is transported. Within the same temperature range cobalt chromite should be transported without decomposition whereas nickel chromite would probably decompose at high temperatures and a low total pressure in the transport system. Octahedral single crystals of CoCr 2 O 4 with a spinel structure have been obtained whereas NiCr 2 O 4 formed octahedra and plates with a tetragonal structure. The reasons of the differences observed with the systems CoCr 2 O 4 Cl 2 and NiCr 2 O 4 Cl 2 have been discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
