Small-Angle Neutron Scattering Investigations on Sintering Behavior of Combustion Synthesized La0.8Sr0.2CrO3
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Published:2008-04-01
Issue:4
Volume:8
Page:2157-2162
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ISSN:1533-4880
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Container-title:Journal of Nanoscience and Nanotechnology
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language:en
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Short-container-title:j nanosci nanotechnol
Author:
Patra A. K.,Bahadur J.,Mazumder S.,Nair Sathi,Purohit R. D.,Tyagi A. K.
Abstract
Pore morphology of La0.8Sr0.2CrO3 (LSC) powder compacts, sintered between 1200 °C and 1450 °C for a fixed time, has been characterized by small-angle neutron scattering (SANS) in the scattering wave vector 'q' range, 0.003–0.17 nm–1
of a double crystal based instrument. Scattering profile of green compact exhibits fractal scaling at two regions of 'q' with magnitudes of fractal dimensionality 1.8 and 2.36. Scattering profiles of sintered pellets have been modeled assuming a random distribution of near spherical
pores in the solid matrix. Estimated pore size distributions of sintered pellets indicate decrease in pore volume has taken place by progressive elimination of smallest pores and growth of relatively larger pores with increasing sintering temperature. SANS results are supplemented by light
scattering measurement and TEM image of powder and SEM image of the fracture surface of sintered pellet.
Publisher
American Scientific Publishers
Subject
Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering