9Vesselin M, Titus F, Wayne B D, et al. Highly crystalline Mn2O3 or Mn3O4 manganese oxides [P]. United States Patent :0022959,2001-09-20.
10Zhang Weixin, Wang Cheng, Zhang Xiaomin, et al. Low temperature synthesis of nanocrystalline Mn3O4 by a solovthermal method[J] . Solid State Ionics, 1999,117: 331-335.