%0 Journal Article
%T Raman Scattering and t-Phase Lattice Vibration of 3% (mole fraction) Y2O3-ZrO2<br>Raman Scattering and t-Phase Lattice Vibration of 3% (mole fraction) Y_2O_3-ZrO_2
%A Xinglun TANG
%A Xiuhua ZHENG
%A <br>Xinglun TANG and Xinhua ZHENG School of Materials Science and Engineering
%A Beijing Institute of Technology
%A Beijing
%A China
%J 材料科学技术学报
%D 2004
%I 
%X The Raman spectra of 3% (mole fraction) Y2O3-ZrO2 (3Y) are obtained at different temperature from 77 K to 853 K. The results show that 260 cm-1 Eg and 460 cm-1 Eg modes on the spectra shift toward lower wave number with the increase of temperature; meanwhile, the continuity of the Half Width at Half Maximum (HWHM) and wave number (frequency) of Raman bands are broken and t-phase only partially transforms to m-phase at 523 K. Based on the experimental results, this paper discusses the t-phase lattice vibration of 3Y and presents the images of vibration displacement of six Raman-active modes for t-phase of ZrO2. The analysis indicates that there are diversities existing in the displacement of the atomic vibration of Raman-active modes because of their different symmetries at various temperature, which leads to the different change tendencies of Raman bands. Furthermore, the abrupt changes of some Raman-active modes indicating the atomic displacement are assumed to be the condensations of phonon modes in the t→m phase transition.
%K Raman scattering
%K Zirconia
%K Phase transition
%K Condensation of phonon<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=625E7739273B19E1&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=94C357A881DFC066&sid=5CB576B96D187F64&eid=F176272DD933A0BB&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=24