Spectroscopy study of Bi₄Ti₃O₁₂ obtained from mechanically activated Bi₂O₃–TiO₂ mixtures

详细信息	查看全文 | 推荐本文 |

• 作者：Z. Lazarevi&#x107 ; B. Stojanovi&#x107 ; M. Romč ; evi&#x107 ; M. Mitri&#x107 ; Č ; . Jovaleki&#x107 ; N. Romč ; evi&#x107
• 关键词：Mechanochemical synthesis ; Crystal structure and symmetry ; X-ray diffraction ; Light absorption and reflection
• 刊名：Journal of Alloys and Compounds
• 出版年：2008
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：3 April 2008
• 卷：453
• 期：1-2
• 页码：499-502
• 文件大小：545 K

摘要

Bismuth titanate, Bi₄Ti₃O₁₂ powders were prepared by mechanically assisted synthesis from their oxides. The diameter of obtained particles depends on time of milling. In order to understand the grain size effects on the crystal structure we measured X-ray, TEM analysis and Raman spectra. The effect of mechanical treatment on the grain size is quite evident: as the milling time increases (3, 6, 12 h), the powder becomes more activated and grain size decrease (7.3, 7.2, 6.9 nm). With reducing the grain size, quantum effects at the Raman spectra, is reflected in the mode position change against balk crystal. And also, coagulation of each line appears, as well as a significant asymmetry of certain modes.