期刊
CERAMICS INTERNATIONAL
卷 40, 期 4, 页码 5645-5651出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.10.159
关键词
Carbon; Zirconia; Phase transformation; Doping
资金
- National Outstanding Young Scientist Foundation [59925208]
- Natural Science Foundation of China [50232040, 50832008, 50802099, 51072201, 1226202]
In the present work, nanocrystnifite ZrO2 was synthesized by calcining zirconium (IV) acetylacetonate. X-ray diffraction results show the existence of tetragonal phase even when the nanocrystallite size reached 47 nm. The presence of amorphous carbon was identified by Raman analysis while the Zr-C bonding was confirmed by X-ray photoelectron spectroscopy analysis. Transmission electron microscopy showed no hard-agglomeration in the samples treated at high temperatures. These results indicated that carbon has influence on the phase stability of t-ZrO2 in two aspects: the amorphous carbon creates a reducing atmosphere, meanwhile carbon atoms bonded with zirconium atoms act as a stabilizer. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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