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    • 4. 发明公开
    • 12CaO 7Al2O3 COMPOUND AND METHOD FOR PREPARATION THEREOF
    • 12CaO 7Al2O3-VERBINDUNG UND HERSTELLUNGSVERFAHRENDAFÜR
    • EP1445237A1
    • 2004-08-11
    • EP02775366.4
    • 2002-10-17
    • Japan Science and Technology Agency
    • HOSONO, HideoHIRANO, MasahiroHAYASHI, Katsuro
    • C01F7/16B01J23/02G01N31/00A01N59/06H01B1/06H01B1/08H01M4/86
    • H01M4/8605A01N59/06B01J23/002B01J23/02B01J37/08B01J2523/00C01F7/164C01P2002/76C01P2002/77C01P2002/82C01P2002/86C01P2002/90H01M4/9016H01M4/9025B01J2523/23B01J2523/31
    • There is provided a C12A7 compound capable of selectively and reversibly clathrating X - ions, such as active oxygen radicals, with improved controllability. The C12A7 compound clathrating OH - ions and On - at a concentration of 2 x 10 19 cm -3 or less can be prepared by subjecting a mixed material containing Ca and Al to a solid phase reaction at a firing temperature not lower than 1200°C and lower than 1449°C in a dry oxygen atmosphere having an oxygen partial pressure of 0.1 atm or more and a water vapor partial pressure of 10 -3 atm or less, keeping the resultant product at a temperature of 1200°C or higher, and cooling rapidly. The C12A7 compound is heat-treated to clathrate OH - ions at a concentration of 2 x 10 19 cm -3 or less, and On - at a high concentration of more than 2 x 10 19 cm -3 . The compound can reversibly clathrate or release On - ion radicals through the elevation or lowering of the temperature thereof in a temperature range of 300 to 850°C. The compound is useful for an oxidation catalyst, an anti-bacterial agent, an ion conducting material, an electrode for a solid-electrolyte fuel cell, and the like.
    • 提供了能够选择性地和可逆地包合X - 离子(例如活性氧自由基)的C12A7化合物,具有改进的可控性。 通过使包含Ca和Al的混合材料在固相反应中进行固相反应,可以制备浓度为2×10 19 cm -3或更小的C12A7化合物包合的OH - 离子和On - 在氧分压为0.1大气压以上,干燥氧气分压为10 -3 atm以下的干燥氧气氛中,在1200℃以上且低于1449℃的烧成温度下,将得到的产物保持在 温度1200℃以上,冷却快。 将C12A7化合物热处理以2×10 19 cm -3或更小的浓度包合OH +离子,并且以高浓度大于2×10 19 厘米<-3>。 该化合物可以在300至850℃的温度范围内通过升高或降低其温度可逆地包合或释放On - - 离子自由基。该化合物可用于氧化催化剂,抗菌剂,离子 导电材料,固体电解质燃料电池用电极等。