Low-temperature sintering behavior of nanocrystalline indium tin oxide prepared from polymer-containing sols

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Abstract

Indium tin hydroxide (ITH) xerogel powders and thin films with different polyvinylpyrrolidone (PVP) contents (0-22%, w/w) were prepared by a classical sol-gel method. To obtain nanocrystalline indium tin oxide (ITO), the ITH xerogels were calcined at 550 °C. The effect of the initial polymer content on the structure of the ITO powders was studied by means of N 2-sorption measurements, small-angle X-ray scattering (SAXS), transmission and scanning electron microscopy. The N 2-sorption measurements revealed that the ITO powders obtained contained micropores and both their porosity and specific surface area decreased with increasing PVP content of the ITH xerogels. The SAXS measurements confirmed the enhanced sintering of the particles in the presence of PVP. The calculated mass fractal dimensions of the ITO powders increased significantly, indicating a significant compaction in structure. The pre-sintered structure could be achieved at relatively low temperature, which induced a significant decreasing (three orders of magnitude) in the electrical resistance of the ITO films.

Original languageEnglish
Pages (from-to)933-940
Number of pages8
JournalMaterials Research Bulletin
Volume47
Issue number4
DOIs
Publication statusPublished - Apr 2012

Fingerprint

Polymethyl Methacrylate
Sols
Tin oxides
indium oxides
Indium
tin oxides
sintering
Polymers
Sintering
Povidone
Powders
Xerogels
xerogels
Tin
polymers
hydroxides
indium
tin
X ray scattering
sorption

Keywords

  • A. Optical materials
  • A. Thin films
  • B. Sol-gel chemistry
  • C. Thermogravimetric analysis (TGA)
  • D. Electrical properties

ASJC Scopus subject areas

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

Cite this

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title = "Low-temperature sintering behavior of nanocrystalline indium tin oxide prepared from polymer-containing sols",
abstract = "Indium tin hydroxide (ITH) xerogel powders and thin films with different polyvinylpyrrolidone (PVP) contents (0-22{\%}, w/w) were prepared by a classical sol-gel method. To obtain nanocrystalline indium tin oxide (ITO), the ITH xerogels were calcined at 550 °C. The effect of the initial polymer content on the structure of the ITO powders was studied by means of N 2-sorption measurements, small-angle X-ray scattering (SAXS), transmission and scanning electron microscopy. The N 2-sorption measurements revealed that the ITO powders obtained contained micropores and both their porosity and specific surface area decreased with increasing PVP content of the ITH xerogels. The SAXS measurements confirmed the enhanced sintering of the particles in the presence of PVP. The calculated mass fractal dimensions of the ITO powders increased significantly, indicating a significant compaction in structure. The pre-sintered structure could be achieved at relatively low temperature, which induced a significant decreasing (three orders of magnitude) in the electrical resistance of the ITO films.",
keywords = "A. Optical materials, A. Thin films, B. Sol-gel chemistry, C. Thermogravimetric analysis (TGA), D. Electrical properties",
author = "L. K{\~o}r{\"o}si and Szilvia Papp and A. Oszk{\'o} and I. D{\'e}k{\'a}ny",
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T1 - Low-temperature sintering behavior of nanocrystalline indium tin oxide prepared from polymer-containing sols

AU - Kõrösi, L.

AU - Papp, Szilvia

AU - Oszkó, A.

AU - Dékány, I.

PY - 2012/4

Y1 - 2012/4

N2 - Indium tin hydroxide (ITH) xerogel powders and thin films with different polyvinylpyrrolidone (PVP) contents (0-22%, w/w) were prepared by a classical sol-gel method. To obtain nanocrystalline indium tin oxide (ITO), the ITH xerogels were calcined at 550 °C. The effect of the initial polymer content on the structure of the ITO powders was studied by means of N 2-sorption measurements, small-angle X-ray scattering (SAXS), transmission and scanning electron microscopy. The N 2-sorption measurements revealed that the ITO powders obtained contained micropores and both their porosity and specific surface area decreased with increasing PVP content of the ITH xerogels. The SAXS measurements confirmed the enhanced sintering of the particles in the presence of PVP. The calculated mass fractal dimensions of the ITO powders increased significantly, indicating a significant compaction in structure. The pre-sintered structure could be achieved at relatively low temperature, which induced a significant decreasing (three orders of magnitude) in the electrical resistance of the ITO films.

AB - Indium tin hydroxide (ITH) xerogel powders and thin films with different polyvinylpyrrolidone (PVP) contents (0-22%, w/w) were prepared by a classical sol-gel method. To obtain nanocrystalline indium tin oxide (ITO), the ITH xerogels were calcined at 550 °C. The effect of the initial polymer content on the structure of the ITO powders was studied by means of N 2-sorption measurements, small-angle X-ray scattering (SAXS), transmission and scanning electron microscopy. The N 2-sorption measurements revealed that the ITO powders obtained contained micropores and both their porosity and specific surface area decreased with increasing PVP content of the ITH xerogels. The SAXS measurements confirmed the enhanced sintering of the particles in the presence of PVP. The calculated mass fractal dimensions of the ITO powders increased significantly, indicating a significant compaction in structure. The pre-sintered structure could be achieved at relatively low temperature, which induced a significant decreasing (three orders of magnitude) in the electrical resistance of the ITO films.

KW - A. Optical materials

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KW - C. Thermogravimetric analysis (TGA)

KW - D. Electrical properties

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