OPTICAL-CONSTANTS OF TETRAGONAL AND CUBIC ZIRCONIAS IN THE INFRARED

The infrared optical constants of cubic and tetragonal zirconias were determined from the analysis of the reflectance spectra of yttria dope d zirconia single crystals and undoped tetragonal zirconia powders, re spectively. In the latter case, the reflectance spectrum was analyzed by an effective medium Theory, which has been proven to successfully d etermine the dielectric properties of small powder particles. The symm etry of the resulting modes of tetragonal zirconia was elucidated by p erforming theoretical calculations of the vibrational properties. (C) 1996 American Institute of Physics.