Paper Title:
The Microstructural Evolution of Mn3O4 Hausmannite during Autoxidation
  Abstract

Mn3O4 hausmannite, which is a normal spinel with the Mn2+ in the tetrahedral site and the Mn3+ in the tetrahedral site, is one of the most stable manganese oxides. Variation in the valence of Mn ions (2+, 3+ and 4+) contributes to several different structures of manganese oxides. The autoxidation of precipitated manganese hydroxide in an alkaline solution is a practical approach to synthesize hausmannite (Mn3O4) at low temperature. During the process, the particle size and morphology of derived products were totally different from the precursors even though nanometer-sized Mn(OH)2 crystals were fabricated at first. It was observed that the variation was resulted from the accumulation of produced Mn3O4 crystallites which departed from the original crystals. This study has not only discussed the influence of reactant concentrations on the particle size and morphology of derived powders, but also revealed the morphological transformation of crystals involved in autoxidation with the aid of electron micrographs

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
693-698
DOI
10.4028/www.scientific.net/KEM.280-283.693
Citation
T. Fang, J. G. Duh, S. Y. Tsai, "The Microstructural Evolution of Mn3O4 Hausmannite during Autoxidation", Key Engineering Materials, Vols. 280-283, pp. 693-698, 2005
Online since
February 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shenglei Che, Tomohiro Sogabe, Norimasa Sakamoto
Abstract:BaNd2Ti4O12 dielectric oxide particles were spheroidized by melting them with a LPG-O2 flame to improve packing and fluidity of the powder....
223
Authors: Fu Su Yen, Pei Ling Chang, Pei Ching Yu, Rong Jeh Yang
Abstract:The traditional differential thermal analysis (DTA) techniques are employed to evaluate the kinetic behavior induced by the inter-particle...
81
Authors: Li Yun Cao, Jian Feng Huang, Jian Peng Wu, Hai Yan He
Abstract:Sr2CeO4 nanocrystallites were prepared by a sonochemical process with a later heat treatment using CeO2 and SrCO3 as source materials. The...
329
Authors: Bi Li, Li Yun Cao, Jian Feng Huang, Jian Peng Wu
Chapter 1: Novel Processing and Manufacturing
Abstract:Nanostructured cobalt sulfide(CoS) can be widely used as high energy density batteries, supercapacitors, solar photovoltaic materials and...
162