Progress on Transparent Yttria,

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Abstract:

La203 - doped Y203 is of interest for infrared applications because it is one of the longest wavelength transmitting oxides. It is refractory with a melting point of 2430 deg c and has a moderate expansion coefficient. The thermal shock and erosion resistance is considered to be intermediate among the oxides, but outstanding compared to non-oxide infrared materials. A major consideration is the low emissivity of Y203 which limits background radiation upon heating. It is also known that the phonon edge gradually moves to shorter wavelengths as a material is heated.

Author(s):
Rhodes, W. H. ; Trickett, E. A.
Author Organization(s):
GTE LABS INC WALTHAM MA
Supplementary Note:
This article is from the Proceedings of the Symposium on Electromagnetic Windows (17th) Held at Georgia Institute of Technology, Engineering Experiment Station, Atlanta, GA. on 25-27 July 1984, AD-A149 125, p187-194.
Pagination:
0008

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-82-C-0452
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Yttrium oxides, Background radiation, Coefficients, Expansion, Melting point, Thermal shock, Frequency, Oxides, Transmitting, Erosion resistance, Infrared radiation, Infrared optical materials, Edges, Phonons, Transparence
Keyword(s):
Component Reports
Report Date:
1983 Jan 01