Dear Respected RG Experts
Can we expect any differences in the crystal growth/ crystallinity/ grain growth of same oxide compound given different conditions of heat treatment – one in loose powder form and another in a compact body like pellets?
Is there any difference on its microstructures? If yes, why and how?
Your kind views and suggestions are most welcome.
With best regards
Thank you dear Dr Daniela for the detail enqiury. My question simply means that is there any possible differences in properties such as structural (xrd, ftir) or microstructural (sem, grain size, growth) or other physical properties for same oxide compound, in which one is given heat treatment in powder form (annealing) and other in pellet form (sintering), other parameters remains same. The measurements of both is finally done in powder form that is pellet is crushed into fine powders for measurement purpose after sintering.
With best regards
From my point of view, you need to ask yourself, which are the differences between bulk an powder. If you consider an identical grain size distribution as rough assumption, the main difference is the free surface which will affect the properties mentioned considerably. Heat and material transfer will be different and so growth speed and also all related mechanisms.
Thank you so much Dr Gert Nozle for sharing the important views and the suggestions.
With best regards
Chitra
Dear Elangbam Chitra Devi,
All below-mentioned articles will help you to differentiate the phase evolution, microstructure, crystal etc. between powder and pellet (compact form)
Article Can a shape factor in bulk ceramics mitigate unwanted phase ...
Article Influence of a “Shape/Consolidation Factor” in Unary, Undope...
Article Delving into the Discrepancy of Phase Developments between P...
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