Temperature-dependent Raman spectra of Bi2Sn2O7 ceramics |
| |
| Institution: | 1. Departamento de Física, Universidade Federal do Maranhão, Campus do Bacanga, 65080-040 São Luis, MA, Brazil;2. Departamento de Física, Universidade Federal de Minas Gerais, ICEx, 31270-901 Belo Horizonte, MG, Brazil;3. Departamento de Física, Universidade Federal do Ceará, Campus do Pici, PO Box 6030, 60455-970 Fortaleza, CE, Brazil;4. Department of Chemistry, University of North Florida, 1 UNF Drive, Jacksonville, FL 32224, USA;1. School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;2. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao East Road, Da''an District, Taipei City, Taiwan;3. Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, W23 FH6, Ireland;4. Department of Road and Bridge Engineering, The University of Da Nang-University of Science and Technology, 54 Nguyen Luong Bang, Da Nang 550000, Viet Nam;1. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, 660036, Russia;2. Reshetnev Siberian State University of Science and Technology, 660037, Krasnoyarsk, Russia;3. Siberian Federal University, Krasnoyarsk, 660041, Russia;1. Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, China;2. Jiangxi Baoan New Material Technology Corporation, LTD, Pingxiang, Jiangxi, 337000, China;1. Chemical Engineering Faculty, Sahand University of Technology, P.O. Box 51335-1996, Sahand New Town, Tabriz, Iran;2. Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, P.O. Box 51335-1996, Sahand New Town, Tabriz, Iran |
| |
| Abstract: | The Bi2Sn2O7 pyrochlore is known to undergo a sequence of structural phase transitions with an increase in temperature. Raman spectroscopy was employed in the investigation of the temperature dependence of the active phonons in the Raman spectrum. We observed 19 broad modes at room temperature, reflecting the low symmetry of the α-phase of Bi2Sn2O7. The modes were discussed in relation to the Raman spectra of other pyrochlore-based oxides. The temperature dependence of the phonons evidences the α → β structural phase transition observed near 127 °C. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
