Open AccessHigh temperature Raman spectra and micro-structure of KTN crystal and melt
Author(s) -
Weina Zhou,
Songming Wan,
Shi Yin,
Qingli Zhang,
Jinglin You,
Yuanyuan Wang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.570
Subject(s) - materials science , raman spectroscopy , spectral line , crystal structure , crystal (programming language) , optics , crystallography , physics , chemistry , programming language , astronomy , computer science
The high temperature Raman spectra of KTN crystal and melt were studied. The structures of KTN crystal and melt were analyzed. The rule of structure change of KTN crystal with increasing temperature was analyzed. The results show that the peaks of spectra move to the lower wavelength and broaden by different degrees. The intensities of spectra peaks decrease, too. Raman peaks at 538, 585, 835, 868 and 875cm-1 were analyzed in detail. Phase transition from tetragonal to cubic was observed and explained. In high temperalure KTN melt, the Ta/NbO6 octahedron entities disappeared. Meanwhile, there were many Ta/Nb O double bonds in the Ta/NbO3- entities. It showed that there were Ta/NbO3- growth unities in KTN melts.