Reduction of metal oxides by mechanical alloying method

用机械合金化法研究了金属氧化物在室温和常压下的还原。1997 - 2000年主要进行了以下研究：(1)用碳还原氧化银和氧化铜(2)穆斯堡尔光谱法的制备(3)1998 - 1999年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)1999 - 2000年摇床式铣床的制造(7)氢和甲烷气体还原氧化铁(8)氧化铁稳定性评价(9)α-铁/磁铁矿配合物颗粒和胞状磁铁矿颗粒的制备。结果表明，金属氧化物在没有热活化的情况下被还原。特别是在氧化铁还原过程中发现了多个纳米级超顺磁性α-铁团簇，从而在原子水平上研究了还原机理，并提出了制备原子团簇的新技术。α-铁/磁铁矿配合物颗粒和细胞状磁铁矿颗粒在国际上首次被发现，并用于醇的转化催化。

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.