Spark Plasma Sintering Effect on Thermoelectric Properties of Nanostructured Bismuth Telluride Synthesized by High Energy Ball Milling.

Thermoelectric properties of high energy ball milled nano structured bismuth telluride (Bi₂Te₃) have been reported. By high energy ball milling, alloyed bulk crystalline ingots crush into nanopowder and followed by spark plasma sintering (SPS), we have demonstrate high figure of merit (ZT) in bismuth telluride pellet samples. In this work systematic study carried out on three pellet samples of Bi₂Te₃, synthesized by high ball milling for the time period of 4 hours, 8 hours and 12 hours and followed by SPS at the same processing parameters.

Synthesis of Highly Transparent Indium Tin Oxide Thin Films Using Vacuum Evaporation Technique.

The synthesis of thin films of ITO (Indium Tin Oxide) is synthesized by thermal evaporation technique under high vacuum conditions and further annealing at different conditions of temperature. These films were further characterized by using SEM, XRD, AFM, photoluminescence spectroscopy and UV-Visible in order to understand the structural and optical properties associated with them. Parameters to synthesize uniform, homogeneous, single phase and highly transparent ITO thin films have been optimized.