Accession Number : ADP004370
Title : Progress on Transparent Yttria,
Corporate Author : GTE LABS INC WALTHAM MA
Personal Author(s) : Rhodes,W. H. ; Trickett,E. A.
Report Date : 1984
Pagination or Media Count : 8
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.
Descriptors : *Yttrium oxides, Background radiation, Coefficients, Expansion, Melting point, Thermal shock, Frequency, Oxides, Transmitting, Erosion resistance, Infrared radiation, Infrared optical materials, Edges, Phonons, Transparence
Distribution Statement : APPROVED FOR PUBLIC RELEASE