Misc.

Open access
Feb, 2007

Synthesis, structures and properties of the cerium doped hematite co-existing with CeO<inf>2</inf>

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
  • Tarequl Islam Bhuiyan
  • ,
  • Makoto Nakanishi
  • ,
  • Yoshihiro Kusano
  • ,
  • Tatsuo Fujii
  • ,
  • Jun Takada
  • ,
  • Yasunori Ikeda

Volume
54
Number
2
First page
112
Last page
118
Language
Japanese
Publishing type
DOI
10.2497/jjspm.54.112

Cerium doped hematite powders obtained by polymeric complex method following the hydrolysis of FeCl · 6H O and Ce(NH ) (NO )6. X-ray diffraction pattern of cerium doped samples obtained at 1000°C̃ 1200°C for two hours in air revealed some solubility of cerium ion in α-Fe O over the composition range of 5%̃15 at% that were characterized by the shifting of X-ray diffraction peaks compared with the internal silicon standard. X-ray Photoelectron Spectra investigations revealed the existence of Ce ion at higher temperature. Unit cell parameters were found to expand due to the incorporation of cerium ions into the hematite lattice. Field Emission Scanning Electron Microscopy studies showed that the growth of particles was suppressed in the appearance of cerium ions into the α-Fe O lattice. Fe Ce O exhibits much lower magnetization due to the incorporation of non-magnetic cerium ions into the α-Fe O . Spectroscopy measurement evidenced that cerium doped hematite samples exhibited brighter yellowish red color tone than that of pure α-Fe O . 3 2 4 2 3 2 3 3+ 2 3 2-x x 3 2 3 2 3

Link information
DOI
https://doi.org/10.2497/jjspm.54.112
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34248333870&origin=inward Open access
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ID information
  • DOI : 10.2497/jjspm.54.112
  • ISSN : 0532-8799
  • SCOPUS ID : 34248333870

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