High-temperature, high-pressure optical cells

Details High-temperature, high-pressure optical cells High-temperature, high-pressure optical cells

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rsci...54..993h&link_type=abstract

Review of Scientific Instruments (ISSN 0034-6748), vol. 54, Aug. 1983, p. 993-995.

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High Pressure, High Temperature, Infrared Windows, Mercury Cadmium Tellurides, Optical Measuring Instruments, Thermal Diffusivity, Microgravity Applications, Silica Glass, Space Commercialization

Scientific paper

For measuring the thermal diffusivity of HgCdTe melts by the laser-pulse method, an infrared transparent cell with flat windows of sufficient strength to withstand the high-vapor pressure of mercury had to be developed. Since mercury telluride expands on freezing, certain difficulties arose in returning the cell to room temperature without cracking it. T08 commercial fused silica is used in the construction of the cell, and the cells are transparent for wavelengths from about 3.5 microns in the infrared to 260 nm in the ultraviolet. The construction procedure for the required cells has been laborious. However, the obtained cell has routinely withstood internal pressures in excess of 60 atm at 900 C. Attention is given to the design of the windows, aspects of cell construction, and questions of loading.

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