,Temperature Dependence of the Raman Spectra and Phase Transition of Zirconia

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A newly constructed high-temperature Raman spectrometer was used to study the temperature-dependence Raman spectra (up to 2023 K) and transformation of zirconia crystal. High-temperature Raman scattering is a useful tool in characterizing the different structures of zirconia and offers the possibility of identifying the phase transformation. It shows that monoclinic zirconia transforms to tetragonal phase at about 1440 K during the process of increasing temperature, but shows a lower transformation temperature from tetragonal to monoclinic phase at about 1323 K while the temperature decreases.
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