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Proceedings Paper

Characterization Of Lanthana-Strengthened Yttria Infrared Transmitting Materials
Author(s): G C Wei; C Brecher; M R Pascucci; E A Trickett; W H Rhodes
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Paper Abstract

Lanthana-strengthened yttria is of interest for infrared applications because of its high strength, long wavel-ength cutoff (8 μm), and low emissivity. The optical, thermal, and mechanical properties of the family of La203-strengthened Y203 have been characterized. The properties can be tailored to suit the requirements of specific applications by adjusting composition and processing parameters. The La203 acts as both a densification aid during fabrication and an agent for microstructural control. Since both strength and toughness depend on microstructure, the La203 allows significant strength enhancement, an important factor for window applications. Theoretical parameters have also been calculated to aid in the assessment of relative resistance to thermal shock fracture initiation. and propagation. These calculations reveal potential inconsistencies that must be resolved by experimental testing.

Paper Details

Date Published: 18 July 1988
PDF: 7 pages
Proc. SPIE 0929, Infrared Optical Materials IV, (18 July 1988); doi: 10.1117/12.945851
Show Author Affiliations
G C Wei, GTE Laboratories Incorporated (United States)
C Brecher, GTE Laboratories Incorporated (United States)
M R Pascucci, GTE Laboratories Incorporated (United States)
E A Trickett, GTE Laboratories Incorporated (United States)
W H Rhodes, GTE Laboratories Incorporated (United States)


Published in SPIE Proceedings Vol. 0929:
Infrared Optical Materials IV
Solomon Musikant, Editor(s)

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