Optical properties of the complex perovskite ceramic oxide Ba2YZrO6‐d

Nanocrystalline Ba₂YZrO_6‐dhas been successfully synthesized through a single step auto‐ignition combustion route. The samples were analyzed by powder X‐ray diffraction, transmission electron microscopy and Ultraviolet‐Visible spectroscopy. The XRD analysis revealed that the material has an ordered complex cubic perovskite structure. The basic optical properties and optical constants of the as‐prepared nanopowder of Ba₂YZrO_6‐dhave been reported for the first time. The spectral analysis revealed that the material is a wide band gap direct transition semiconductor with band gap of 3.70 eV at room temperature. The poor transmittance in ultraviolet but good transmittance in visible‐near infrared regions make the material potentially important for poultry protection and warming coatings, solar control, antireflection coatings and window layer in solar cells. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)