Infrared Physics & Technology · 1998 · 95 citations · 6 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOpticsSpectroscopyFourier Transform SpectroscopyInfrared Optical MaterialsInfrared SpectroscopyLaser SpectroscopyOptical SpectroscopyRefractive IndexCarbon DioxideComplex Refractive IndexFourier TransformHigh-temperature Infrared MaterialsQuantum Mechanical ModelSpectroscopic Characterization Of Laser HostsSurface TemperatureThermal Infrared Materials
A vacuum emissometer, utilizing a carbon dioxide laser for high-temperature sample heating, has been designed and built for use with a Fourier Transform spectrometer. A two-color pyrometer technique is used to measure sample surface temperature. Oxides such as sapphire, spinel, yttria, aluminum oxynitride, and fused silica are experimentally characterized in temperature from 600 to 2000 K and in frequency from 500 to 5000 cm−1. A glowing yttria sample has also been characterized over the spectral range of 8500 to 13 500 cm−1. Good agreement with temperature dependent classical oscillator and quantum mechanical multiphonon models for the complex index of refraction is obtained.
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