Phase transformation behavior of nanocrystalline ITO powders during heat-treatment: Oxygen partial pressure effect

Youn Gon Park; Kyung Han Seo; Joon Hyung Lee; Jeong Joo Kim; Sang Hee Cho; Charles J. O'Conner; Jai Sung Lee

doi:10.1007/s10832-004-5203-y

Phase transformation behavior of nanocrystalline ITO powders during heat-treatment: Oxygen partial pressure effect

Youn Gon Park, Kyung Han Seo, Joon Hyung Lee, Jeong Joo Kim, Sang Hee Cho, Charles J. O'Conner, Jai Sung Lee

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

10 Scopus citations

Abstract

Nanocrystalline indium tin oxide (ITO) powders with different tin contents ranging from 0 to 8 at% were prepared by a coprecipitation process. A mixture of rhombohedral and cubic structured nanocrystalline ITO powders was obtained, and the amount of the rhombohedral ITO increased as the content of Sn increased. During heat-treatment the rhombohedral ITO was transformed to cubic around 900°C. The phase transformation behavior of the powders was examined as a function of oxygen partial pressure. When the rhombohedral ITO powder was heat-treated in a low oxygen partial pressure (nitrogen gas) atmosphere the phase transformation was accelerated and this acceleration can be attributed to the formation of oxygen vacancies that accelerate atomic transport in the rhombohedral ITO.

Original language	English
Pages (from-to)	851-855
Number of pages	5
Journal	Journal of Electroceramics
Volume	13
Issue number	1-3
DOIs	https://doi.org/10.1007/s10832-004-5203-y
State	Published - Jul 2004

Keywords

ITO
Nanocrystalline powder
Oxygen partial pressure
Phase transformation

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10.1007/s10832-004-5203-y

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title = "Phase transformation behavior of nanocrystalline ITO powders during heat-treatment: Oxygen partial pressure effect",

abstract = "Nanocrystalline indium tin oxide (ITO) powders with different tin contents ranging from 0 to 8 at% were prepared by a coprecipitation process. A mixture of rhombohedral and cubic structured nanocrystalline ITO powders was obtained, and the amount of the rhombohedral ITO increased as the content of Sn increased. During heat-treatment the rhombohedral ITO was transformed to cubic around 900°C. The phase transformation behavior of the powders was examined as a function of oxygen partial pressure. When the rhombohedral ITO powder was heat-treated in a low oxygen partial pressure (nitrogen gas) atmosphere the phase transformation was accelerated and this acceleration can be attributed to the formation of oxygen vacancies that accelerate atomic transport in the rhombohedral ITO.",

keywords = "ITO, Nanocrystalline powder, Oxygen partial pressure, Phase transformation",

author = "Park, {Youn Gon} and Seo, {Kyung Han} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Cho, {Sang Hee} and O'Conner, {Charles J.} and Lee, {Jai Sung}",

year = "2004",

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doi = "10.1007/s10832-004-5203-y",

language = "English",

volume = "13",

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journal = "Journal of Electroceramics",

issn = "1385-3449",

publisher = "Springer Netherlands",

number = "1-3",

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TY - JOUR

T1 - Phase transformation behavior of nanocrystalline ITO powders during heat-treatment

T2 - Oxygen partial pressure effect

AU - Park, Youn Gon

AU - Seo, Kyung Han

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Cho, Sang Hee

AU - O'Conner, Charles J.

AU - Lee, Jai Sung

PY - 2004/7

Y1 - 2004/7

N2 - Nanocrystalline indium tin oxide (ITO) powders with different tin contents ranging from 0 to 8 at% were prepared by a coprecipitation process. A mixture of rhombohedral and cubic structured nanocrystalline ITO powders was obtained, and the amount of the rhombohedral ITO increased as the content of Sn increased. During heat-treatment the rhombohedral ITO was transformed to cubic around 900°C. The phase transformation behavior of the powders was examined as a function of oxygen partial pressure. When the rhombohedral ITO powder was heat-treated in a low oxygen partial pressure (nitrogen gas) atmosphere the phase transformation was accelerated and this acceleration can be attributed to the formation of oxygen vacancies that accelerate atomic transport in the rhombohedral ITO.

AB - Nanocrystalline indium tin oxide (ITO) powders with different tin contents ranging from 0 to 8 at% were prepared by a coprecipitation process. A mixture of rhombohedral and cubic structured nanocrystalline ITO powders was obtained, and the amount of the rhombohedral ITO increased as the content of Sn increased. During heat-treatment the rhombohedral ITO was transformed to cubic around 900°C. The phase transformation behavior of the powders was examined as a function of oxygen partial pressure. When the rhombohedral ITO powder was heat-treated in a low oxygen partial pressure (nitrogen gas) atmosphere the phase transformation was accelerated and this acceleration can be attributed to the formation of oxygen vacancies that accelerate atomic transport in the rhombohedral ITO.

KW - ITO

KW - Nanocrystalline powder

KW - Oxygen partial pressure

KW - Phase transformation

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DO - 10.1007/s10832-004-5203-y

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SN - 1385-3449

VL - 13

SP - 851

EP - 855

JO - Journal of Electroceramics

JF - Journal of Electroceramics

IS - 1-3

ER -

Phase transformation behavior of nanocrystalline ITO powders during heat-treatment: Oxygen partial pressure effect

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Keywords

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