β Scribed by W.E Vargas; P Greenwood; J.E Otterstedt; G.A Niklasson
No coin nor oath required. For personal study only.
Small silica particles uniformly coated by a shell of titania, were produced by wet chemical methods. The pigments were dispersed in polymeric binders and were applied as paints to glass substrates. Total reflectance and transmittance were determined by integrating sphere measurements. Luminous and solar reflectance of paints containing the novel pigments were comparable with paints containing commercial titania. The spectral transmittance and reflectance of the paints were modelled by a four-flux radiative transfer theory. Theory and experiment could be brought into good agreement, if it was assumed that the particles were slightly porous. The studied pigments may find applications in sunscreens or in foils for daylighting and radiative cooling.
π SIMILAR VOLUMES
Angular structures in the far-field scattering from bubbles are observed and modeled. Mie theory supports a model of diffraction and interference near the critical scattering angle. A new expression for the angular spacing of fine structure is derived. Photographs of scattefing show some of the pred