Thermoelectric Iron Oxides

Tsuyoshi Kajitani; Tomohiro Nozaki; Kei Hayashi

doi:10.4028/www.scientific.net/AST.74.66

Paper Titles

The Evaluation of TiTe₂ as a Diffusion Barrier in the Formation of Low Thermal Conductivity Nanolaminates with Bi₂Te₃ and Sb₂Te₃
p.38

Structural Characterization of Nano-Crystalline Mg₂Si Prepared by Ball Milling
p.48

High-Temperature Transport Properties of Indium Added Cobalt-Antimonide Based Skutterudites Processed by Current Assisted Short-Term Sintering
p.54

Raman Spectroscopy Study on Na_2/3Mn_1-xFe_xO₂ Oxides
p.60

Thermoelectric Iron Oxides
p.66

Thermoelectric Generating Properties of Perovskite Like Materials
p.72

Improved Thermoelectrics Based on Bismuth and Antimony Chalcogenides for Temperatures below 240 K
p.77

Thermoelectric Application for Power Generation in Japan
p.83

Modular Combustor-Radiator for Micro-TPV System Application
p.93

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 74Thermoelectric Iron Oxides

Thermoelectric Iron Oxides

Abstract:

P- and N-type thermoelectric iron oxides were developed. The p- and n-type thermoelectric iron oxides were based on delafossite-type CuFeO2 and spinel-type Fe3O4, respectively. The dimensionless figure of merit, ZT, of the bulk p- and n-type iron oxides were 0.15 and 0.10 at 1200K, respectively. The ZT values were improved by the introduction of nano-voids. The physical properties of these iron oxides are structurally unique because of the triangular, or “Kagome,” arrangement of FeO6 octahedra. The delafossite-type CuFeO2 becomes anti-ferromagnet at temperatures less than 20K. The inverse spinel-type Fe3O4 is a ferrimagnet　at room temperature. In both crystals, the iron ions are assumed to be in the high-spin state.