| 钙钛矿型复合氧化物催化剂中过渡金属离子的状态及其间的相互作用 |
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| 引用本文： | 刘社田 于作龙. 钙钛矿型复合氧化物催化剂中过渡金属离子的状态及其间的相互作用[J]. 无机材料学报, 1995, 10(1): 62-68 |
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| 作者姓名： | 刘社田 于作龙 |
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| 作者单位： | 中国科学院长春应用化学研究所，中国科学院大连化学物理研究所催化重点实验室博士后流动站 |
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| 摘 要： | 讨论了Ｂ位二元复下钛矿型复合氧化物ＬａＭｙＭ＇１－ｙＯ３（Ｍ，Ｍ＇＝Ｍｎ，Ｆｅ，Ｃｏ；ｙ＝０．０￣１．０）中过渡金属离子的状态及其间的相互作用。在Ｍｎ－Ｃｏ复合体系中，富锰区（ｙ〉０．５）Ｍｎ＾３＋－Ｏ＾２－－Ｍｎ＾４＋的铁磁超交换作用对样品的磁性起决定作用。富钴区（ｙ〉０．５）Ｃｏ＾２＋和Ｃｏ＾ＩＩＩ离子的存在及其浓度是影响磁性和电导性的主要因素。ｙ＝０．５时样品的结构决定了样品的强铁磁性质。在
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| 关 键 词： | 钙钛矿 复合氧化物 过渡金属离子 催化剂 |
Transition Metal Ion States and Their Interactions of Perovskite-type Mixed Oxides LaMyM''_(1-y)O_3 |
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| Liu Shetian, Yu Zuolong, Wu Yue. Transition Metal Ion States and Their Interactions of Perovskite-type Mixed Oxides LaMyM''_(1-y)O_3[J]. Journal of Inorganic Materials, 1995, 10(1): 62-68 |
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| Authors: | Liu Shetian Yu Zuolong Wu Yue |
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| Affiliation: | Changchun Institute of Applied Chemistry of Chinese Academy of Sciences Changchun 130022 China |
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| Abstract: | The transition metal ion states and their interactions in B-site mired perovskite-type chides LaMyM'1-yO3 (M, M'=Mn, Fe, Co) were discussed. In Mn-Co combined system, the ferromagnetic superexchange interaction of Mn3 -O2--Mn4 plays a dominant role upon the magnetic property of the Mn-rich samples (y>0.5) and the concentrations of Co2 and Co3 in CO-rich samples (y<0.5) is the main factor influencing their magnetic and electronic properties. The strong ferromagnetic property of the sample with a composition of y=0.5 is mainly due to its crystal structure. In Fe-Mn and Fe-Co systems, the variant Fe ion states are mainly due to the distribution of Mn or Co in its neighboring transition metal ion site and the different redox properties of Mn, Fe, Co ions. |
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| Keywords: | perovskite mixed oxide transition metal ion state electric-magnetic propeyty Mossbauer spectra |
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