Table 3. Main Features of the Reflectance Changes Experienced by Different Annealed Samples in the Vis–NIR Range when Increasing Temperaturea.
| sample | ΔRmax (%) | λmax (nm) | λ0 (nm) |
|---|---|---|---|
| T100_550_10 | 40 | 1515 | 990 |
| T100_550_30 | 11 | 2060 | 1415 |
| T200_550_45 | 65 | 2375 | 1130 |
| T300_550_45 | 50 | 3300 | 945 |
ΔRmax indicates the maximum value taken by ΔR (which is given by the difference between the reflectance values at 110 and 25 °C, respectively), λmax is the wavelength at which ΔRmax occurs, and λ0 denotes the limiting wavelength beyond which ΔR only takes positive values. The accuracies of reflectance (%) and wavelength (nm) values are ±0.5% and ±1 nm, respectively.