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Your search keyword '"Zhao, Yongnian"' showing total 3 results
Start Over Author "Zhao, Yongnian" Journal high pressure research
3 results on '"Zhao, Yongnian"'

1. High pressure raman spectra of melamine (C3H6N6) and pressure induced transition

Author

Liu Zhenxian, Cui Qi-Liang, Zhang Zhaojin, Zou Guang-Tian, Zhao Yongnian, and LI Dong-Mei

Subjects
Phase transition, symbols.namesake, chemistry.chemical_compound, Chemistry, High pressure, Phase (matter), Analytical chemistry, symbols, Condensed Matter Physics, Raman spectroscopy, Melamine
Abstract

High pressure Raman spectra of Melamine (C3H6N6) have been studied up to 8.7 GPa. The pressure effect on Raman spectra reveals that the discrepancy between intra and inter-molecule bonds tends to shrink with increasing pressure. The experimental results show that Melamine probably undergoes two structural transitions at 2 and 6 GPa respectively and the structure of the new phase has C1 1 i symmetry probably at 2GPa

Published
1990

3. Raman study of anatase (TiO2) at high pressure

Author

Gou, Bingcong, Liu, Zhenxian, Cui, Qiliang, Yang, Haibin, Zhao, Yongnian, and Zou, Guangtian

Abstract

The Raman spectra of anatase have been investigated under pressure up to 17 GPa and at room temperature. The pressure dependences of the Raman active modes are reported. A pressure-induced phase transition of anatase is observed at pressure above 7.1 GPa in the hydrostatic environment using a 4 :1 mixture of methanol and ethanol as pressure medium. On the basis of in situ powder X-ray diffraction data and comparison of the Raman spectrum of the high-pressure modification with that of TiO2, -II (a-PbO2, -type structure), it is evident that at high pressure anatase transforms irreversibly to Ti PbO2, -II.

Published
1989
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