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

doi:10.1016/j.materresbull.2005.09.003

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 language	English
Pages (from-to)	628-634
Number of pages	7
Journal	Materials Research Bulletin
Volume	41
Issue number	3
DOIs	https://doi.org/10.1016/j.materresbull.2005.09.003
Publication status	Published - 2006 Mar 9

Bibliographical note

Funding Information:
This paper was supported by Konkuk University in 2003.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.materresbull.2005.09.003

Cite this

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title = "Oxidation behavior of amorphous metallic Ni3(SbTe 3)2 compound",

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.",

author = "Jun, {Jong Ho} and Jung, {Jin Seung} and Oh, {Seung Lim} and Kim, {Yong Rok} and Lee, {Sung Han} and O'Connor, {Charles J.}",

note = "Funding Information: This paper was supported by Konkuk University in 2003.",

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AU - Jun, Jong Ho

AU - Jung, Jin Seung

AU - Oh, Seung Lim

AU - Kim, Yong Rok

AU - Lee, Sung Han

AU - O'Connor, Charles J.

N1 - Funding Information: This paper was supported by Konkuk University in 2003.

PY - 2006/3/9

Y1 - 2006/3/9

N2 - 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.

AB - 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.

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