• Effect of heat treatment on pore structure in nanocrystalline NiO: A small angle neutron scattering study

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/071/05/0965-0970

    • Keywords

       

      Nanoceramics; small angle neutron scattering; sintering; NiO.

    • Abstract

       

      Nanocrystalline nickel oxide powders were calcined at 300, 600 and 900°C and pore structure evolution was followed by small angle neutron scattering (SANS). Pore size distributions at two widely separated size ranges have been revealed. Shrinkage of larger-sized pore with reduction in polydispersity has been observed with increasing heat treatment temperature. The pore structures at various heat treatment temperatures do not scale. This has been attributed to the grain boundary diffusion leading to an asymmetric shrinkage of the pores.

    • Author Affiliations

       

      J Bahadur1 D Sen1 S Mazumder1 S Ramanathan2

      1. Solid State Physics Division; Bhabha Atomic Research Centre, Mumbai 400 085, India
      2. Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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