Infrared thermochromic behaviour of a composite Sm0.65Ca0.35MnO3-poly(styrene-co-acrylonitrile) film
Abstract
Samarium calcium perovskite manganite Sm0.65Ca0.35MnO3 was dispersed homogeneously in a solution of poly(styrene-co-acrylonitrile). A thin film was deposited on (100) oriented silicon substrate by spin-coating and the optical thermochromic behaviour in the infrared range was studied. In the wavelength range 8-14 µm, the optical transmittance of the thermochromic composite coating exhibited a large variation between 173 and 343 K due to a semiconductor-metal first-order transition at Tc = 250 K. The thermochromic behaviour of the composite coatings was optimized. The contrast in the transmittance first increased with pigment content, then reached a maximum value.
- Publication:
-
Smart Material Structures
- Pub Date:
- May 2009
- DOI:
- 10.1088/0964-1726/18/5/055002
- Bibcode:
- 2009SMaS...18e5002A