Nano Archive

Phase controlled structure formation of the nanocrystalline zirconia using thermal plasma technique

Nawale, Ashok B and Kulkarni, Naveen and Karmakar, Soumen and Das, A K and Bhoraskar, S V and Mathe, V L (2010) Phase controlled structure formation of the nanocrystalline zirconia using thermal plasma technique. Journal of Physics: Conference Series, 208 (1). 012121.

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Official URL: http://stacks.iop.org/1742-6596/208/i=1/a=012121

Abstract

Nanocrystalline ZrO 2 powder was synthesized by dc transferred arc thermal plasma reactor by homogeneous gas phase condensation mechanism. ZrO 2 is an oxide ceramic with a high melting point, good chemical resistance and high mechanical strength. When doped with certain oxides, ZrO 2 shows high ionic conductivity. ZrO 2 is also recognized as a superior thermal barrier material. Thermal plasma synthesis of oxide nano materials shows pressure dependent crystalline phase and crystallite size. The X-ray diffraction analysis clearly shows that as the ambient oxygen gas pressure increases from 100 Torr to 1000 Torr the abundance of tetragonal phase goes on increasing. The morphology of the as synthesized ZrO 2 powder was found to be spherical and independent on the ambient gas pressure as seen from the Scanning Electron Microscopy studies. The specific surface area of powder was calculated using the nitrogen gas adsorption Brunauer, Emmett, Teller surface area analysis technique and found no much variation.

Item Type:Article
ID Code:11261
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:30
Last Modified:02 Nov 2011 00:47

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