Reduction of metal oxides by mechanical alloying method

研究了金属氧化物在常温常压下的机械合金化还原。1997 - 1998年：（1）用碳还原银氧化物和氧化铜;（2）穆斯堡尔谱仪的制备;（3）机械化学反应器的制造。（4）金属元素还原铁（5）陶瓷反应体系的制备（6）振动筛的制造-（7）用氢气和甲烷气体还原铁氧化物;（8）铁氧化物稳定性的评价;（9）α-Fe/磁铁矿复合颗粒和蜂窝状磁铁矿颗粒的制备。特别是在氧化铁的还原反应中发现了多个纳米级超顺磁性α-Fe团簇，使还原反应的机理得以在原子水平上研究，并提出了制备原子团簇的新技术。并在国际上首次发现了α-Fe/磁铁矿复合粒子和胞状结构的磁铁矿粒子用于催化酒精的Transformer。

The authors studied the reduction of metal oxides at room temperature and at room pressure by mechanical alloying method. The followings were examined from 1997 to 2000.from 1997 to 1998 : (1) reduction of silver oxide and copper oxide with carbon(2) preparation of Mossbauer spectroscopy(3) manufacturing of mechanochemical reactorfrom 1998 to 1999 : (4) reduction of iron with metallic elements(5) preparation of ceramic reaction system(6) manufacturing of shaker-type milling machinefrom 1999 to 2000 : (7) reduction of iron oxides with hydrogen and methane gas(8) evaluation of the stability of-iron oxides(9) preparation of α-Fe/magnetite complex particle and cell-structured magnetite particle.It was demonstrated that metal oxides were reduced without thermal activation. In particular, several nanometer and super-paramagnetic α-Fe cluster was discovered in reduction of iron oxide, which lead that the mechanism of reduction was able to be studied at atomic level and also the new technique to prepare atom clusters was proposed. And α-Fe/magnetite complex particle and cell-structured magnetite particle were discovered for the first time in the world which was used the catalysis for transformer of alcohol.