マイクロ波照射による固体混合物からのLi-Mn複合酸化物の生成機構

概要

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Formation condition of Li-Mn mixed-metal oxide by microwave irradiation on some solid mixtures has been examined. The mixtures consisted of LiOH•H2O as Li source and MnO2, MnO or Mn2O3 as Mn source were employed as starting materials. The starting mixtures were irradiated with 2.45 GHz microwave. Temperature change of the samples during the irradiation was measured with radiation thermometer. Product analysis was carried out by X-ray diffraction measurements. It was found that LiMn2O4 formed from the mixtures of LiOH•H2O and MnO2 or Mn2O3, while the formation reaction did not occur in the case of the LiOH•H2O and MnO. This difference in the reactivity is attributed to the microwave-induced spontaneous heating efficiency of manganese oxides. Formation mechanism of LiMn2O4 is discussed on the basis of the experimental results.
2010-02-23