Variable range hopping conduction in fully dense calcium cobalt oxide textured ceramics. Issue 13 (September 2018)

• Record Type: Journal Article
• Authors: Puri, Nidhi; Tandon, Ram P.; Mahapatro, Ajit K.
• Is Part Of: Ceramics international. Volume 44:Issue 13(2018)
• Page Start: 15478
• Page End: 15482
• Publication Date: 2018-09
• Subjects: Ca3Co4O9 ceramics -- Hot pressing -- Electrical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.05.205
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Fully dense hot-pressed calcium cobalt oxide (Ca3 Co4 O9 ) pellet exhibits textures with Lotgering factor of unity and supports the ideally aligned (00 l ), l = 2, 3, 4, 5 crystallographic planes associated in the ceramics. The DC electrical conductivity of the Ca3 Co4 O9 pellets connected to metal/Ca3 Co4 O9 -pellet/metal device structures in vertical and lateral configurations follow Mott's variable range hopping. The exhibition of anisotropic ratio of ~ 10 between the room temperature conductivity values in both the structures, reveal the presence of partially oriented textured grains in the currently developed Ca3 Co4 O9 ceramics. Graphical abstract: fx1