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Synthesis of Single‐Phase Gd‐Doped Ceria Nanopowders by Radio Frequency Thermal Plasma Treatment
Author(s) -
Lee MiYeon,
Song MinKyung,
Kim JeongSoo,
Seo JunHo,
Kim MinHo
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12918
Subject(s) - materials science , transmission electron microscopy , inductively coupled plasma , analytical chemistry (journal) , ball mill , doping , diffraction , scanning electron microscope , powder diffraction , phase (matter) , plasma , chemical engineering , nuclear chemistry , nanotechnology , crystallography , chemistry , metallurgy , optics , composite material , chromatography , optoelectronics , physics , organic chemistry , engineering , quantum mechanics
Gd‐doped ceria nanopowders were synthesized using Radio Frequency (RF) thermal plasma. The powders were prepared by ball‐milling Gd 2 O 3 and CeO 2 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 CeO 2 particles. In addition, no crystalline peak for Gd 2 O 3 appeared in the X‐ray diffraction patterns of the as‐synthesized powders, which is attributed to the solid solution of Gd 3+ into the CeO 2 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.