Table of Contents
ISRN Nanotechnology
Volume 2012, Article ID 608756, 6 pages
http://dx.doi.org/10.5402/2012/608756
Research Article

High-Purity Nanopowders for Laser Applications

nGimat LLC., 2436 Over Drive, Suite B, Lexington, KY 40511, USA

Received 26 January 2012; Accepted 28 February 2012

Academic Editors: C.-C. Chen, A. N. Obraztsov, and A. Patra

Copyright © 2012 Deepak Ganta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have successfully developed high-quality laser-grade yttrium aluminum garnet (YAG), and lutetium oxide (Lu2O3), using a novel combustion chemical vapor condensation (CCVC) technique based on a proprietary NanoSpray Combustion process. The purity of the nanopowders was >99%. Nanopowders with different dopants have been synthesized over a 10–200 nm size range, with low-cost, high-purity precursors that are viable for large-scale production. Great strides have also been made in developing highly dense (>99% theoretical density) polycrystalline Nd-doped YAG pellets using vacuum sintering and hot isostatic pressing (HIP). This method is an alternative to the Czochralski method for making single-crystal ceramic bodies, which has several disadvantages including high cost, size, shape restrictions, and limitations in Nd concentrations (1 at %). Nanomaterials also enable higher percentages of Nd to be incorporated into the YAG lattice which improves laser efficiency and >85% near IR transmission, thereby reducing scattering losses associated with larger grain-size polycrystalline materials.