Abstract
A heater cell for use with a far-infrared asymmetric Michelson interferometer is described. The heater cell enables high temperature complex reflection coefficient measurements for the first time. Difficulties with measurements at temperatures greater than 500 K are discussed. Representative spectra are reported for Na β-alumina, an ionic conductor, and ferroelectric LiTaO 3. These experiments show that high temperature optical properties can be obtained without recourse to theoretical fitting models and Kramers-Krönig analysis.
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