Promising high temperature thermoelectric properties of dense Ba2Co9O14 ceramics. Issue 7 (July 2017)

• Record Type: Journal Article
• Authors: Delorme, F.; Chen, C.; Pignon, B.; Schoenstein, F.; Perriere, L.; Giovannelli, F.
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 7(2017)
• Page Start: 2615
• Page End: 2620
• Publication Date: 2017-07
• Subjects: Thermoelectric -- Spark plasma sintering -- Layered cobalt oxides; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.01.034
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Layered cobalt oxides have shown high thermoelectric properties. The n = 1 member of the Ba n +1 Co n O3 n +3 (Co8 O8 ) family, Ba2 Co9 O14, a new layered cobalt oxides family with Co(II) and Co(III) in the CdI2 layers, has been synthesized by solid state reaction and sintered as dense ceramics (relative density ∼ 93%) by Spark Plasma Sintering. It presents promising p-type thermoelectric properties at high temperature. The dimensionless figure of merit ZT is 0.032 at 660 K and 0.04 at 1000 K, which is about one quarter to one third of the ZT value of Ca3 Co4 O9 ceramics.