Xuemei Yi

Abstract:

This paper describes recent developments in combustion synthesis (CS) for producing hydrides, nitrides, oxide and alloys during the last two decades which basically uses exothermic heat efficiently among powders and gas. It is mainly characterized by self-propagation of a high temperature synthesis (SHS) wave, minimization of productive energy, short processing time, non-equilibrium phase, high purity product, simple equipment and high productivity. In particular, combustion synthesis of hydrides1-3) (Mg2NiH4, LaNi5H6, FeTiH2, MgH2), nitrides4) (Si3N4, AlN, SiAlON), oxides (TiOx, FexO, MnxO, ABO3) and alloy (Fe2VAl) under the control of atmosphere has been recently reported. Synthesis of a non-stoichiometric compound such as TiOx by control of powder mixing ratio is also attractive from the viewpoint of defect design. The survey on major database revealed that the products reported covers many state-of-the-art energy conversion materials such as photo-catalyst, catalyst for the diesel engine, semiconductor, dielectrics, battery-related material, hydrogen storage alloy, thermoelectric device, refractory, hard material, and sinter for ironmaking. In conclusion, combustion synthesis will be reviewed from three viewpoints of exergy engineering, process engineering, and material science, together with companies established in Japan. <br />Keywords; combustion, process, energy, hydrogen, nitrogen, oxidation, industry<br />Reference)<br />1) Hydriding Combustion Synthesis for the Production of Hydrogen Storage Alloy, T. Akiyama, H. Isogai and J. Yagi, Journal of Alloys and Compounds, 252(1997), pp.1-4. [I.F. 1.035]<br />2) Hydriding Combustion Synthesis of TiFe, I. Saita, M. Sato, H.Uesugi, T. Akiyama, Journal of Alloys and Compounds, 446-447(2007), pp.195-199. [I.F. 1.455]<br />3) Self-ignition combustion synthesis of LaNi5 utilizing hydrogenation heat of metallic calcium,<br />N. Yasuda, S. Sasaki, N. Okinaka, T. Akiyama, International Journal of Hydrogen Energy, 35(2010), pp.11035&#65533;11041. [I.F. 3.945]<br />4) A New Route to Synthesize beta-Si6-zAlzOzN8-z Powders, K. Aoyagi, T. Hiraki, R, Sivakumar, T, Waranabe, T. Akiyama, Journal of Alloys and Compounds, 441(2007), pp.236-244. [I.F. 1.455]