Relationship between anion and cation nonstoichiometries and valence state of titanium in perovskite-type oxynitrides LaTiO2N
Relationship between anion and cation nonstoichiometries and valence state of titanium in perovskite-type oxynitrides LaTiO2N
复制标题
钙钛矿型氮氧化物LaTiO2N中阴离子和阳离子非化学计量与钛价态的关系
DOI：
10.2109/jcersj2.117.76
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发表时间：
2009
影响因子：
1.1
通讯作者：
T. Moriga
中科院分区：
文献类型：
--
作者：
Yuki Masuda;Ryota Mashima;Mayu Yamada;K. Ikeuchi;K. Murai;Geoffrey I N Waterhouse;J. Metson;T. Moriga
为了通过XPS光谱阐明成分对钛价态的影响，制备了三个系列的(La,Sr)TiO2N化合物，即阴离子非化学计量LaTiO2+xN1-x、阳离子非化学计量La1-x Ti1+xO2N或La1-xSrxTiO2N系列。虽然用锶替代镧对于增强吸收限以上较长波长区域的反射率是有效的，但是在La1-xTi1+xO2N或La1-xSrxTiO2N系列中钛的价态没有改变。然而，人们发现LaTiO2+xN1-x系列中氧含量的增加会导致钛的氧化。
Three series of (La,Sr)TiO2N compounds, with either anion nonstoichiometry LaTiO2+xN1-x, cation nonstoichiometry La1-x Ti1+xO2N or an La1-xSrxTiO2N series, have been prepared in order to clarify, by XPS spectroscopy, the influence of composition on the valence state of titanium. Though the substitution of lanthanum by strontium was effective in the enhancement of reflectivity in the longer wavelength region above the absorption edge, the valence state of titanium did not change in either the La1-xTi1+xO2N or the La1-xSrxTiO2N series. However, it was found that the increase of oxygen content in the LaTiO2+xN1-x series causes oxidation of the titanium.