Osipov, V. V. and Khasanov, B. A. and Shitov, V. A. and Dvilis, E. S. and Ivanov, M. G. and Orlov, A. N. and Platonov, V. V. and Vyukhina, I. V. and Kachaev, A. A. and Sokolov , V. M. (2008) Optical Nd3+Y2O3 ceramics of nanopowders compacted by static pressure using the ultrasonic method. Nanotechnologies in Russia, Volume 3 (7-8). pp. 474-480.
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The possibility of synthesizing technological Nd3+Y2O3 and Y2O3 optically transparent ceramics is studied. This technology is different from the conventional approaches, because the compacting was performed using the uniaxial static compression with ultrasonic treatment of the compacted nanopowder. It was found that the relative compact density in the case of compaction of weakly agglomerated powders with an average particle size of about 10 nm varies in the range from 0.48 to 0.58 depending on pressure (240720 MPa), and it weakly depends on the ultrasonic treatment. At the same time, using ultrasound for nanopowder compaction allowed enhancement of the optical properties of ceramics and indeed race in its radiation attenuation factor at the wavelength of 1.06 ?m from 8.26 to 2.53 cm?1. The radiation attenuation is related to the scattering centers observed in the samples: pores and inclusions with a content of about ?10?2 and 10?3 vol %, respectively, as well as the compaction defects that play a predominant role in the process. It is pointed out that the developed approach is promising for manufacturing large-volume, optically transparent ceramics.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||19 Dec 2008 13:11|
|Last Modified:||01 Feb 2009 20:52|
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