Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5442512 | Optical Materials | 2017 | 6 Pages |
Abstract
Polycrystalline compounds of LiBaF3 were synthesized using conventional solid state reaction route and the phase purity was confirmed using powder X-ray diffraction technique. Using vertical Bridgman technique single crystal was grown from melt. Rocking curve measurements have been carried out to study the structural perfection of the grown crystal. The single peak of diffraction curve clearly reveals that the grown crystal was free from the structural grain boundaries. The low temperature thermoluminescence of the X-ray irradiated sample has been analyzed and found four distinguishable peaks having maximum temperatures at 18, 115, 133 and 216Â K. Activation energy (E) and frequency factor (s) for the individual peaks have been studied using Peak shape method and the computerized curve fitting method combining with the Tmax- TStop procedure. Nanoindentation technique was employed to study the mechanical behaviour of the crystal. The indentation modulus and Vickers hardness of the grown crystal have values of 135.15Â GPa and 680.81 respectively, under the maximum indentation load of 10Â mN.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
D. Joseph Daniel, P. Ramasamy, R. Ramaseshan, H.J. Kim, Sunghwan Kim, G. Bhagavannarayana, Jong-Kyu Cheon,