Development of a new thermoelectric Bi2Ca2Co1.7Ox + Ca3Co4O9 composite

作者：Rasekh Sh^*; Ferreira N M; Costa F M; Constantineseu G; Madre M A; Torres M A; Diez J C; Sotelo A

来源：Scripta Materialia, 2014, 80: 1-4.

DOI：10.1016/j.scriptamat.2014.01.032

• Directional solidification
• Electrical resistivity
• Electroceramics
• Thermoelectric materials
• Cobaltites

Bi2Ca2Co1.70Ox, nominal composition ceramic rods were textured by the electrically assisted laser floating zone technique. A new composite formed by three phases, two of them with well-known thermoelectric properties, Bi2Ca2Co1.7Ox and Ca3Co4O9, was obtained for the first time when the growth process was performed with a 300 mA applied current. Under these conditions the thermoelectric performances of this new composite reach values above the highest ones reported in the literature for polycrystalline Bi2Ca2Co1.7Ox, materials.

• 出版日期2014-6