The Synthesis of Sr1-xLaxTiO3 under High-Temperature and High-Pressure and Its XPS Study
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摘要: 利用高温高压方法合成了有稀土元素La掺杂的钙钛矿氧化物Sr1-xLaxTiO3。XRD测试表明,在x0.5时,样品基本为单相,呈立方相;晶胞体积随x的增加而增加,在x=0.4时开始减小。XPS测量发现,样品中存在Ti离子的变价。讨论了Ti离子价态的变化对晶格参数的影响。
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关键词:
- 高温高压 /
- Sr1-xLaxTiO3 /
- XPS
Abstract: The perovskite oxides, Sr1-xLaxTiO3, were synthesized at high-temperature and high-pressure. XRD measurement shows that the samples with x0.5 are in single phase and belong to cubic phase structure. Cell volume increase at beginning of x, then decrease at x=0.4. XPS analysis indicates that Ti ions are in mixed valence. The influence of valence state of Ti ions on the lattice parameters is discussed.-
Key words:
- high temperature and high pressure /
- Sr1-xLaxTiO3 /
- XPS
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