Ionic conductivity studies on neodymium doped ceria in different atmospheres. (18th August 2010)

• Record Type: Journal Article
• Authors: Bedekar, Vinila V.; Patra, Saheli; Dutta, Atanu; Basu, R.N.; , A.K. Tyagi
• Is Part Of: International journal of nanotechnology. Volume 7:Number 9/10/11/12(2010)
• Page Start: 1178
• Page End: 1187
• Publication Date: 2010-08-18
• Subjects: powders-chemical preparation -- sintering -- ionic conductivity -- grain boundaries -- nanocrystalline -- neodymium -- ceria powders -- gel combustion synthesis -- nanotechnology -- nanopowders -- CeO2; 620.505
• Languages: English
• ISSNs: 1475-7435

Abstract

Nano-crystalline 10 and 20 mol% neodymium (Nd) doped ceria powders were prepared by gel-combustion synthesis. The single-phase nature of the nano powder has been confirmed by X-ray diffraction. These sinter-active nano powders resulted in dense products, as the sintered densities were found to be ∼90% of theoretical densities. Ionic conductivity studies were carried out in air, hydrogen and oxygen atmospheres. The samples showed ionic conductivity of 1.3 × 10−2 S cm−1 at 650°C, and the activation energy values obtained in this system were in the range of 0.7-1.0 eV. These studies also revealed that no electronic conduction was observed, as the ionic conductivity values were almost similar in different environments.