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Citation: Lai Qiongyu, Lu Jizheng, Xiao Shuxing, Zheng Zonghe. Preparation of γ-Mn₂O₃ by Oxidation Under Hydrothermal Conditions[J]. Chinese Journal of Applied Chemistry, ;1999, 16(2): 60-63. shu

Preparation of γ-Mn₂O₃ by Oxidation Under Hydrothermal Conditions

1.
Department of Chemistry, Sichuan University, Chengdu 610064

Received Date: 29 September 1998
Available Online: 29 December 1998

Ultrafine γ-Mn₂O₃ powder was prepared by an oxidation method under hydrothermal conditions. After sintering at 100~550℃ in air the products exhibit good stability and have been characterized by XRD, TEM, XPS, IR and UV spectra measurements to be fine crystals of single phase, majority in ball form. Their average sizes increase with increase of the sintering temperatures. The manganese in γ-Mn₂O₃ is in Mn(Ⅲ) form.
- γ-Mn₂O₃,
- nanometer powder,
- preparation,
- hydrothermal oxidation
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Preparation of γ-Mn₂O₃ by Oxidation Under Hydrothermal Conditions