Oxidation behavior of amorphous metallic Ni3(SbTe 3)2 compound

Jong Ho Jun, Jin Seung Jung, Seung Lim Oh, Yong Rok Kim, Sung Han Lee, Charles J. O'Connor

Research output: Contribution to journalArticle

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Abstract

Amorphous Ni3(SbTe3)2 compound was prepared from a metathesis between Zintl phase K3SbTe3 and NiBr2 in solution and its oxidation behavior was investigated in the temperature range of 200-700°C in air. To characterize the sample, thermogravimetry (TG), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive analysis by X-ray (EDAX) analyses were performed and electrical conductivity was measured as a function of temperature in the range of 25-800°C in air. The specimen showed a metallic conducting-like behavior below 585°C while a semiconducting-like behavior above 585°C. At a first oxidation step of Ni3(SbTe 3)2 below 500°C, TeO2 phase is formed. Above 500°C, NiO phase is formed, then some NiO reacts with TeO2 to form NiTeO3 and NiSb2O6 is simultaneously formed. Above 700°C, NiTeO3 is further reacted with TeO 2 to form NiTe2O5. Both NiTeO3 and NiTe2O5 are decomposed above 774°C.

Original languageEnglish
Pages (from-to)628-634
Number of pages7
JournalMaterials Research Bulletin
Volume41
Issue number3
DOIs
Publication statusPublished - 2006 Mar 9

Fingerprint

Oxidation
oxidation
Air
X ray powder diffraction
Thermogravimetric analysis
metathesis
air
thermogravimetry
X rays
Temperature
Scanning electron microscopy
x rays
electron energy
conduction
conductivity
electrical resistivity
scanning electron microscopy
temperature
diffraction
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Jun, Jong Ho ; Jung, Jin Seung ; Oh, Seung Lim ; Kim, Yong Rok ; Lee, Sung Han ; O'Connor, Charles J. / Oxidation behavior of amorphous metallic Ni3(SbTe 3)2 compound. In: Materials Research Bulletin. 2006 ; Vol. 41, No. 3. pp. 628-634.
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Oxidation behavior of amorphous metallic Ni3(SbTe 3)2 compound. / Jun, Jong Ho; Jung, Jin Seung; Oh, Seung Lim; Kim, Yong Rok; Lee, Sung Han; O'Connor, Charles J.

In: Materials Research Bulletin, Vol. 41, No. 3, 09.03.2006, p. 628-634.

Research output: Contribution to journalArticle

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