Zirconia, extinction coefficient

Values for conductivity, extinction coefficient, and albedo were obtained from [18] for porous partially stabilized zirconia (PSZ). The correlation for Nus-selt number [19] is given by... 

Hsu et al. [88], during measurement of the thermal conductivity of porous partially stabilized zirconia, used a two-flux radiation model to infer the effective radiative extinction coefficient as a function of pore size. They present a correlation of the data of the form... 

Integration of the spectral results of Hendricks and Howell [253] provides mean extinction coefficient data that can be compared with that of Hsu et al. [88]. The Hale and Bohn [252] data are only for the wavelength of 488 nm. Hendricks and Howell [253] found that a modified geometrical optics relation also fit the data for the spectrally integrated extinction coefficient of both zirconia and silicon carbide. They recommend the relation... 

FIGURE 7.30 Extinction coefficient versus pore diameter for alumina, partially stabilized zirconia, and silicon carbide. 

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