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| 负热膨胀材料钨酸钇的快速合成及其Raman光谱(英文) | |
| 引用本文： | 袁超,梁源,王俊平,梁二军.负热膨胀材料钨酸钇的快速合成及其Raman光谱(英文)[J].硅酸盐学报,2009,37(5). |
| 作者姓名： | 袁超 梁源 王俊平 梁二军 |
| 作者单位： | 1. 河南农业大学理学院,郑州,450002;郑州大学物理工程学院,材料物理教育部重点实验窒,郑州,450052 2. 复旦大学物理系,上海,200433;郑州大学物理工程学院,材料物理教育部重点实验窒,郑州,450052 3. 郑州大学物理工程学院,材料物理教育部重点实验窒,郑州,450052 |
| 基金项目： | 河南省杰出科研人才创新工程项目，河南省高等学校杰出科研人才创新工程项目 |
| 摘 要： | 用二氧化碳激光快速凝同技术合成了负热膨胀材料钨酸钇.场发射扫描电子显微镜和X射线衍射分析表明:二氧化碳激光快速凝固技术合成的钨酸钇(Y2W3O12)为正变相的层状致密块体.Y2W3O12由于在大气中存放后会形成Y2W3O12·xH2O,Raman光谱研究表明:其中的水分子不仅能阻碍其共亭项角多面体的摇摆,而且将阻碍每一种振动.低于388 K,所释放的水分子对WO4]四面体内振动的影响较小,在该温度以上能够释放的水分子对Y2W3O12框架结构中的多面体的摇摆运动、伸缩振动、弯曲振动、天平动和平动均有较大的阻碍作用.变温Raman光谱揭示:不仅低频卢子模,而且高频光学卢子模对负热膨胀也有贡献. |
| 关 键 词： | 负热膨胀 钨酸钇 声子模 Raman光谱 |
RAPID SYNTHESIS AND RAMAN SPECTRA OF A NEGATIVE THERMAL EXPANSION MATERIAL OF YTTRIUM TUNGSTATE |
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| YUAN Chao,LIANG Yuan,WANG Junping,LIANG Erjun.RAPID SYNTHESIS AND RAMAN SPECTRA OF A NEGATIVE THERMAL EXPANSION MATERIAL OF YTTRIUM TUNGSTATE[J].Journal of The Chinese Ceramic Society,2009,37(5). | |
| Authors: | YUAN Chao LIANG Yuan WANG Junping LIANG Erjun |
| Affiliation: | 1.School of Sciences;Henan University of Agriculture;Zhengzhou 450002;2.Department of Physics;Fudan University;Shanghai 200433;3.School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China;Zhenghou University;Zhengzhou 450052;China |
| Abstract: | A negative thermal expansion material of yttrium tungstate was synthesized by rapid solidification with a CO2 laser.The yttrium tungstate is a bulk material with a densely packed layer structure and orthorhombic phase,shown by field emission-scanning electron microscopy and X-ray diffraction.Y2W3O12 can be changed to form Y2W3O12?xH2O by adsorbing water in air after being stored at ambient atmosphere.Raman spectra reveal that the presence of water molecules in the material affects not only the rocking motio... |
| Keywords: | negative thermal expansion yttrium tungstate phonon modes Raman spectroscopy |
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