Synthesis and structures of lithium manganese oxide spinel, LiMn2O4−δ (0≤δ≤0.27)
Synthesis and structures of lithium manganese oxide spinel, LiMn2O4−δ (0≤δ≤0.27)
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锂锰氧化物尖晶石LiMn2O4−δ (0≤δ≤0.27)的合成和结构
DOI：
10.1016/s0378-7753(01)00687-5
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发表时间：
2001
影响因子：
9.2
通讯作者：
T. Kamiyama
中科院分区：
文献类型：
--
作者：
R. Kanno;M. Yonemura;T. Kohigashi;Y. Kawamoto;M. Tabuchi;T. Kamiyama
在不同的合成条件下合成了锂锰氧化物尖晶石，并通过 TOF 中子粉末衍射测量确定了它们的结构。 800℃以上合成的样品存在氧空位，并且空位的数量对合成条件敏感。接近化学计量的尖晶石是在 750°C 的氧气中合成的，然后在 470°C 下加热。立方晶系-斜方晶系转变的转变温度和磁性能随成分的不同而变化。化学计量尖晶石没有表现出立方-斜方相变。
Lithium manganese oxides spinels were synthesized under various synthesis conditions and their structures were determined by TOF neutron powder diffraction measurements. Oxygen vacancies exist for the samples synthesized above 800°C, and the amount of vacancies was found to be sensitive to the synthesis conditions. The nearly stoichiometric spinels were synthesized at 750°C in O2followed by heating at 470°C. The transition temperatures of the cubic–orthorhombic transitions and the magnetic properties varied with the compositions. The stoichiometric spinel showed no cubic–orthorhombic phase transition.