Synthesis of Single‐Phase Gd‐Doped Ceria Nanopowders by Radio Frequency Thermal Plasma Treatment. Issue 5 (10th April 2014)

• Record Type: Journal Article
• Authors: Lee, Mi‐Yeon; Song, Min‐Kyung; Kim, Jeong‐Soo; Seo, Jun‐Ho; Kim, Min‐Ho; Butt, D.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 5(2014)
• Page Start: 1379
• Page End: 1382
• Publication Date: 2014-04-10
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12918
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12918-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Gd‐doped ceria nanopowders were synthesized using Radio Frequency (RF) thermal plasma. The powders were prepared by ball‐milling Gd₂O₃ and CeO₂ powders of several tens of μm in size at the cation ratio of 8:2 and 9:1. The prepared precursors were treated by RF thermal plasma at a plate power level of ~140 kVA, and then, small‐sized powders (~50 nm) were retrieved by filtration. Transmission Electron Microscopy, Electron Energy Loss Spectroscopy, and Selected‐Area Electron‐Diffraction images of the as‐synthesized powders showed that Gd atoms were incorporated into the CeO₂ particles. In addition, no crystalline peak for Gd₂O₃ appeared in the X‐ray diffraction patterns of the as‐synthesized powders, which is attributed to the solid solution of Gd³⁺ into the CeO₂ lattices. Finally, Inductively Coupled Plasma‐Optical Emission Spectrometry analysis data revealed relatively small changes within 3 at.% in the cation composition between the ball milled powder mixtures and the nanoscale powders prepared from these mixtures.</p> </abstract>