Low-Cost IR Windows and Lenses made from Polycrystalline YAG

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-07-M-5409
Agency Tracking Number: F071-118-2510
Amount: $99,713.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solitcitation Year: 2007
Solitcitation Topic Code: AF071-118
Solitcitation Number: 2007.1
Small Business Information
5395 West 700 South, Salt Lake City, UT, 84104
Duns: 858801483
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Feng Zhao
 Research Scientist
 (801) 530-4987
Business Contact
 Anthony Decheek
Title: Contract Administrator
Phone: (801) 530-4987
Email: adecheek@msrihome.com
Research Institution
This Small Business Innovation Research (SBIR) Phase I proposal from Materials and Systems Research, Inc. (MSRI) and University of Utah (subcontractor) seeks to fabricate single-phase, polycrystalline yttrium aluminum garnet (YAG) with a density greater than 99.95% and a mean grain size less than 1 micron. Polycrystalline YAG with these properties will have optical transmittance comparable to that of single crystal YAG in the midwave (3-5 micron) and long wave (8-14 micron) infrared windows. The high density and small grain size will be achieved by a fabrication route that will combine the following steps: preparation of a stable suspension of submicron YAG powder, forming a green compact by colloidal isopressing, and a two-stage densification by pressureless sintering followed by hot-isostatic pressing. The proposed fabrication route has two distinct advantages over conventional powder processing methods: (a) it eliminates microstructural inhomogenities that limit strength, durability and optical transmittance in conventional powder processing, (b) it eliminates a number of steps involved in conventional processing and leads to a lower cost. Research in Phase I will fabricate disks 100-150 mm in diameter and 3-6 mm in thickness. Measurements of fracture strengths, fracture toughness, and optical transmittance will be done by University of Utah under a subcontract.

* information listed above is at the time of submission.

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