Effect of convection gas on the synthesis of nanophase tin oxides during a gas condensation method

Jae Pyoung Ahn; Jong Ku Park; Byoung Kee Kim; Moo Young Huh

doi:10.1007/BF03025961

Effect of convection gas on the synthesis of nanophase tin oxides during a gas condensation method

Jae Pyoung Ahn, Jong Ku Park, Byoung Kee Kim, Moo Young Huh

* Honorary professors

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

6 Citations (Scopus)

Abstract

Tin oxide powders of nanometer size have been synthesized by a gas condensation method using helium or a mixture of oxygen and helium as the convection gas. Changes in the average size, morphology, and crystal phases were investigated during heat treatment at temperatures between 350°C and 720°C in the air. Spherical tin oxide powders of 15 nm in average diameter were synthesized in a helium atmosphere, which was composed of Sn, SnO, and Sn₂O₃, phases. After annealing at 720°C, these multiphase particles transformed to a single SnO₂ phase and became an irregular shape of about 50 nm in diameter. This rapid coarsening was attributed to fast mass transfer among particles. The spherical SnO₂ powder of 7 nm in average diameter was directly synthesized using a gas mixture of oxygen and helium. Upon annealing up to 720°C, morphological changes were barely observed in the powder synthesized using a convection atmosphere containing oxygen.

Original language	English
Pages (from-to)	188-192
Number of pages	5
Journal	Metals and Materials International
Volume	3
Issue number	3
DOIs	https://doi.org/10.1007/BF03025961
Publication status	Published - 1997

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/BF03025961

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title = "Effect of convection gas on the synthesis of nanophase tin oxides during a gas condensation method",

abstract = "Tin oxide powders of nanometer size have been synthesized by a gas condensation method using helium or a mixture of oxygen and helium as the convection gas. Changes in the average size, morphology, and crystal phases were investigated during heat treatment at temperatures between 350°C and 720°C in the air. Spherical tin oxide powders of 15 nm in average diameter were synthesized in a helium atmosphere, which was composed of Sn, SnO, and Sn2O3, phases. After annealing at 720°C, these multiphase particles transformed to a single SnO2 phase and became an irregular shape of about 50 nm in diameter. This rapid coarsening was attributed to fast mass transfer among particles. The spherical SnO2 powder of 7 nm in average diameter was directly synthesized using a gas mixture of oxygen and helium. Upon annealing up to 720°C, morphological changes were barely observed in the powder synthesized using a convection atmosphere containing oxygen.",

author = "Ahn, {Jae Pyoung} and Park, {Jong Ku} and Kim, {Byoung Kee} and Huh, {Moo Young}",

note = "Funding Information: This work was supported by KOSEF (961-0802-012-2) and nanoMAT.",

year = "1997",

doi = "10.1007/BF03025961",

language = "English",

volume = "3",

pages = "188--192",

journal = "Metals and Materials International",

issn = "1598-9623",

publisher = "Korean Institute of Metals and Materials",

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TY - JOUR

T1 - Effect of convection gas on the synthesis of nanophase tin oxides during a gas condensation method

AU - Ahn, Jae Pyoung

AU - Park, Jong Ku

AU - Kim, Byoung Kee

AU - Huh, Moo Young

N1 - Funding Information: This work was supported by KOSEF (961-0802-012-2) and nanoMAT.

PY - 1997

Y1 - 1997

N2 - Tin oxide powders of nanometer size have been synthesized by a gas condensation method using helium or a mixture of oxygen and helium as the convection gas. Changes in the average size, morphology, and crystal phases were investigated during heat treatment at temperatures between 350°C and 720°C in the air. Spherical tin oxide powders of 15 nm in average diameter were synthesized in a helium atmosphere, which was composed of Sn, SnO, and Sn2O3, phases. After annealing at 720°C, these multiphase particles transformed to a single SnO2 phase and became an irregular shape of about 50 nm in diameter. This rapid coarsening was attributed to fast mass transfer among particles. The spherical SnO2 powder of 7 nm in average diameter was directly synthesized using a gas mixture of oxygen and helium. Upon annealing up to 720°C, morphological changes were barely observed in the powder synthesized using a convection atmosphere containing oxygen.

AB - Tin oxide powders of nanometer size have been synthesized by a gas condensation method using helium or a mixture of oxygen and helium as the convection gas. Changes in the average size, morphology, and crystal phases were investigated during heat treatment at temperatures between 350°C and 720°C in the air. Spherical tin oxide powders of 15 nm in average diameter were synthesized in a helium atmosphere, which was composed of Sn, SnO, and Sn2O3, phases. After annealing at 720°C, these multiphase particles transformed to a single SnO2 phase and became an irregular shape of about 50 nm in diameter. This rapid coarsening was attributed to fast mass transfer among particles. The spherical SnO2 powder of 7 nm in average diameter was directly synthesized using a gas mixture of oxygen and helium. Upon annealing up to 720°C, morphological changes were barely observed in the powder synthesized using a convection atmosphere containing oxygen.

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U2 - 10.1007/BF03025961

DO - 10.1007/BF03025961

M3 - Article

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SN - 1598-9623

VL - 3

SP - 188

EP - 192

JO - Metals and Materials International

JF - Metals and Materials International

IS - 3

ER -

Effect of convection gas on the synthesis of nanophase tin oxides during a gas condensation method

Abstract

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