Metal Oxide Nanopowders for the Production of Transparent Windows

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$749,848.00
Award Year:
2009
Program:
STTR
Phase:
Phase II
Contract:
FA9550-09-C-0054
Award Id:
83323
Agency Tracking Number:
F074-009-0041
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
4401 Dayton-Xenia Road, Dayton, OH, 45432
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
074689217
Principal Investigator:
KristIn Keller
Research Scientist
(937) 426-6900
kkeller@ues.com
Business Contact:
Bryce Skinn
Business Relations Manager
(937) 426-6900
bskinn@ues.com
Research Institute:
The University of Michigan
Thomas W Zdeba
Div. of Research Dev. & Admin.
3003 South State Street
Ann Arbor, MI, 48109
(734) 936-1292
Nonprofit college or university
Abstract
In the Phase I STTR work, YAG (yttrium aluminum garnet) was identified as the superior choice for use as a UV-VIS window in advanced propulsion applications, based on measured properties and literature data. YAG provides a better combination of retained high temperature strength, creep resistance, optical isotropy and resistance to neutron irradiation. The Phase II STTR program is focused on the continued development of transparent YAG hollow cylinders through both slip casting and extrusion of YAG tubes. Slip cast prototypes were produced by UES under the Phase I program and the method was successful; however, extruding tubes should allow for a higher production rate and the University of Michigan will develop this process. Additions of fugitive elements will also be examined for the production of internal channels. Polishing of the cylinders will be studied in collaboration with a commercial source. Information on the response of YAG at high temperature, including microstructural stability, mechanical properties, optical transmission, and radiation resistance will be determined in this work. Further, the lifetime behavior of YAG cylinders under expected use conditions will be predicted using these results. Transparent YAG cylinders will be delivered to the Air Force for further evaluation in actual use environments. BENEFIT: At the end of the Phase II work, it is expected that dense, transparent, complex-shaped ceramic YAG windows can be produced that meet all of the necessary optical and mechanical requirements for advanced propulsion applications: high transmittance, high refractive index homogeneity, low bulk optical absorption, high strength and high fracture toughness. Examples of potential military applications are sensor or laser windows for extreme aero-thermal environments, window components in advanced propulsion systems utilizing high intensity radiative energy, transparent armor such as vehicle vision blocks, windshields, blast shields and IR transparent windows for radomes. Commercial applications include high intensity industrial lighting, commercial laser gain products, and optical ceramics, such as high temperature envelopes for metal gas lamps. An environmental impact can also be expected, if solar concentrators can be utilized with these UV transparent window materials.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government