Control of nonstoichiometric defects in manganese oxides by self-propagating high-temperature synthesis

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• 作者：Maki Hiramoto^a ; Noriyuki Okinaka^b ; Tomohiro Akiyama^b ; ^{takiyama@eng.hokudai.ac.jp}
• 关键词：Chemical synthesis ; Defects ; Oxides ; Crystal structure
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：15 May, 2012
• 卷：134
• 期：1
• 页码：98-102
• 文件大小：431 K

摘要

Nonstoichiometric compounds of Mn_1鈭?em>未O were self-propagating high-temperature synthesized by ignition of thoroughly mixed powders of Mn, NaClO₄, and MnO without additional external heating. The mixing ratio was systematically varied to control 未. Single phase Mn_1鈭?em>未O products containing nonstoichiometric defects were obtained for 0 < 未 鈮?#xA0;0.025. With increase in 未, Mn₃O₄ content of the products is increased. Double phases of Mn_1鈭?em>未O and Mn₃O₄ were obtained at 0.025 < 未 鈮?#xA0;0.150. The lattice parameter, a, of the single phase Mn_1鈭?em>未O was well explained by the linear equation: a = 鈭?.0667未 + 4.448.