Diffusion-Controlled Formation of Ti2O3 during Spark-Plasma Synthesis

• DOI: 10.1021/ic3027094
• Publication Date: 2013-03-22T11:55:38Z
• Authors: I. Veremchuk; I. Antonyshyn; C. Candolfi; X. Feng; U. Burkhardt; M. Baitinger; J.-T. Zhao; Yu. Grin
• Keywords: Spark Plasma Sintering; Rutile; Atmospheric temperature range

The spark-plasma-sintering (SPS) technique has successfully been applied for the single-step direct synthesis of Ti2O3 from a mixture powders rutile/anatase with titanium. components react by diffusion through grain boundaries, forming several intermediate phases locally. A single-phase material titanium(III) oxide is obtained in compact bulk form after 180 min SPS treatment at 1473 K. electrical and thermal transport properties such SPS-prepared measured temperature range between 300 800 K reflect known semiconductor-to-metal transition above 400 observed metallic-like conductivity this good agreement previously reported results. maximum thermoelectric figure-of-merit ZT = 0.04 achieved 350