Crystal structure, microstructure, thermal expansion and electrical conductivity of CeO2–ZrO2 solid solution. (17th November 2017)

• Record Type: Journal Article
• Authors: Wang, Xiangnan; Liu, Tao; Wang, Cheng; Yu, Jingkun; Li, Lin
• Is Part Of: Advances in applied ceramics. Volume 116:Number 8(2017)
• Page Start: 477
• Page End: 481
• Publication Date: 2017-11-17
• Subjects: CeO2–ZrO2 -- crystal structure -- microstructure -- thermal expansion -- conductivity; Ceramics -- Periodicals; 620.1405
• DOI: 10.1080/17436753.2017.1358503
• Languages: English
• ISSNs: 1743-6753

Abstract

ABSTRACT: CeO2 –ZrO2 solid solution was synthesised by mechanical activation solid-state chemical reaction method and characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal dilatometer, Hebb–Wagner method and DC van der Pauw method. The effects of CeO2 content on the crystal structure, microstructure, thermal expansion coefficient (TEC), electronic conductivity and total conductivity were investigated. XRD analysis showed that (25 and 75 mol-%) CeO2 –ZrO2 solid solutions corresponded to tetragonal and cubic phase, and 50 mol-% CeO2 –ZrO2 belonged to the mixture of tetragonal and cubic phases. SEM analysis showed that doping CeO2 was helpful to the sinterability of CeO2 –ZrO2 samples. The TECs increased from 13.27 × 10 −6 to 14.72 × 10 −6 K −1 with increasing CeO2 content. The electronic and total conductivities of 75 mol-% CeO2 –ZrO2 were largest, reaching 1.02 × 10 −4 S cm −1 and 1.02 × 10 −2 S cm −1 at 850°C, respectively.