Densification of nanocrystalline ITO powders in fast firing: Effect of specimen mass and sintering atmosphere

Bong Chull Kim; Joon Hyung Lee; Jeong Joo Kim; Hee Young Lee; Jai Sung Lee

doi:10.1016/j.materresbull.2004.10.006

Densification of nanocrystalline ITO powders in fast firing: Effect of specimen mass and sintering atmosphere

Bong Chull Kim, Joon Hyung Lee, Jeong Joo Kim, Hee Young Lee, Jai Sung Lee

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

35 Scopus citations

Abstract

Nano-sized indium tin oxide (ITO) powders were prepared by a coprecipitation method, and the sintering characteristics in fast firing were examined. The mass of the specimen, sintering atmosphere and sintering temperature varied. Oxygen atmosphere promoted the densification in normal rate sintering, while oxygen inhibited the densification in fast firing. Fast firing severely retarded densification as the mass of the specimen and the sintering temperature increased. This was explained by differential densification, which could easily occur in conditions with a high densification rate and a high thermal gradient in the specimen, where the outer region of the specimen densifies much faster than the center. Once the highly densified outer skeleton is formed, the inside of the specimen is difficult to densify because the outer skeleton geometrically constrains densification.

Original language	English
Pages (from-to)	395-404
Number of pages	10
Journal	Materials Research Bulletin
Volume	40
Issue number	2
DOIs	https://doi.org/10.1016/j.materresbull.2004.10.006
State	Published - 15 Feb 2005

Keywords

A. Ceramics
A. Nanostructures
B. Chemical synthesis
D. Microstructure

Access to Document

10.1016/j.materresbull.2004.10.006

Cite this

@article{9400e0f1d628408da34855a55ef223f0,

title = "Densification of nanocrystalline ITO powders in fast firing: Effect of specimen mass and sintering atmosphere",

abstract = "Nano-sized indium tin oxide (ITO) powders were prepared by a coprecipitation method, and the sintering characteristics in fast firing were examined. The mass of the specimen, sintering atmosphere and sintering temperature varied. Oxygen atmosphere promoted the densification in normal rate sintering, while oxygen inhibited the densification in fast firing. Fast firing severely retarded densification as the mass of the specimen and the sintering temperature increased. This was explained by differential densification, which could easily occur in conditions with a high densification rate and a high thermal gradient in the specimen, where the outer region of the specimen densifies much faster than the center. Once the highly densified outer skeleton is formed, the inside of the specimen is difficult to densify because the outer skeleton geometrically constrains densification.",

keywords = "A. Ceramics, A. Nanostructures, B. Chemical synthesis, D. Microstructure",

author = "Kim, {Bong Chull} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Lee, {Hee Young} and Lee, {Jai Sung}",

year = "2005",

month = feb,

day = "15",

doi = "10.1016/j.materresbull.2004.10.006",

language = "English",

volume = "40",

pages = "395--404",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Ltd.",

number = "2",

}

TY - JOUR

T1 - Densification of nanocrystalline ITO powders in fast firing

T2 - Effect of specimen mass and sintering atmosphere

AU - Kim, Bong Chull

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Lee, Hee Young

AU - Lee, Jai Sung

PY - 2005/2/15

Y1 - 2005/2/15

N2 - Nano-sized indium tin oxide (ITO) powders were prepared by a coprecipitation method, and the sintering characteristics in fast firing were examined. The mass of the specimen, sintering atmosphere and sintering temperature varied. Oxygen atmosphere promoted the densification in normal rate sintering, while oxygen inhibited the densification in fast firing. Fast firing severely retarded densification as the mass of the specimen and the sintering temperature increased. This was explained by differential densification, which could easily occur in conditions with a high densification rate and a high thermal gradient in the specimen, where the outer region of the specimen densifies much faster than the center. Once the highly densified outer skeleton is formed, the inside of the specimen is difficult to densify because the outer skeleton geometrically constrains densification.

AB - Nano-sized indium tin oxide (ITO) powders were prepared by a coprecipitation method, and the sintering characteristics in fast firing were examined. The mass of the specimen, sintering atmosphere and sintering temperature varied. Oxygen atmosphere promoted the densification in normal rate sintering, while oxygen inhibited the densification in fast firing. Fast firing severely retarded densification as the mass of the specimen and the sintering temperature increased. This was explained by differential densification, which could easily occur in conditions with a high densification rate and a high thermal gradient in the specimen, where the outer region of the specimen densifies much faster than the center. Once the highly densified outer skeleton is formed, the inside of the specimen is difficult to densify because the outer skeleton geometrically constrains densification.

KW - A. Ceramics

KW - A. Nanostructures

KW - B. Chemical synthesis

KW - D. Microstructure

UR - http://www.scopus.com/inward/record.url?scp=12444259776&partnerID=8YFLogxK

U2 - 10.1016/j.materresbull.2004.10.006

DO - 10.1016/j.materresbull.2004.10.006

M3 - Article

AN - SCOPUS:12444259776

SN - 0025-5408

VL - 40

SP - 395

EP - 404

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 2

ER -

Densification of nanocrystalline ITO powders in fast firing: Effect of specimen mass and sintering atmosphere

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this