Study on the thermal stability of ordered mesoporous SiO 2 film for thermal insulating film

Tae Jung Ha, Hyung-Ho Park, Ho Won Jang, Seok Jin Yoon, Sangwoo Shin, Hyung Hee Cho

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ordered mesoporous SiO 2 film has very low thermal conductivity compared to dense SiO 2 film due to the presence of nanometer-sized pores. In order to apply this excellent material to thermal insulation fields, it is important to ensure the thermal stability of the pore structure at high temperature as well as thermal conductivity. In this study, ordered mesoporous SiO 2 films were synthesized with various amounts of surfactant, and heat treatment at various temperatures was conducted with the synthesized films to confirm their thermal stabilities. Pore structure degradation of the mesoporous SiO 2 film was observed with increasing temperature of the heat treatment as measured by grazing incidence small angle X-ray scattering. However, mesoporous SiO 2 films with highly-ordered pore arrangements showed enhanced thermal stability and maintained their pore structures during additional heat treatment at higher temperatures. The mechanical properties and thermal conductivity of the ordered mesoporous SiO 2 films with thermal stability at high temperature were analyzed.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalMicroporous and Mesoporous Materials
Volume158
DOIs
Publication statusPublished - 2012 Aug 1

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Thermodynamic stability
thermal stability
porosity
Pore structure
Thermal conductivity
heat treatment
thermal conductivity
Heat treatment
Temperature
thermal insulation
Thermal insulation
Hot Temperature
X ray scattering
grazing incidence
Surface-Active Agents
Surface active agents
surfactants
mechanical properties
degradation
Degradation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

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abstract = "Ordered mesoporous SiO 2 film has very low thermal conductivity compared to dense SiO 2 film due to the presence of nanometer-sized pores. In order to apply this excellent material to thermal insulation fields, it is important to ensure the thermal stability of the pore structure at high temperature as well as thermal conductivity. In this study, ordered mesoporous SiO 2 films were synthesized with various amounts of surfactant, and heat treatment at various temperatures was conducted with the synthesized films to confirm their thermal stabilities. Pore structure degradation of the mesoporous SiO 2 film was observed with increasing temperature of the heat treatment as measured by grazing incidence small angle X-ray scattering. However, mesoporous SiO 2 films with highly-ordered pore arrangements showed enhanced thermal stability and maintained their pore structures during additional heat treatment at higher temperatures. The mechanical properties and thermal conductivity of the ordered mesoporous SiO 2 films with thermal stability at high temperature were analyzed.",
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Study on the thermal stability of ordered mesoporous SiO 2 film for thermal insulating film. / Ha, Tae Jung; Park, Hyung-Ho; Jang, Ho Won; Yoon, Seok Jin; Shin, Sangwoo; Cho, Hyung Hee.

In: Microporous and Mesoporous Materials, Vol. 158, 01.08.2012, p. 123-128.

Research output: Contribution to journalArticle

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AU - Cho, Hyung Hee

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AB - Ordered mesoporous SiO 2 film has very low thermal conductivity compared to dense SiO 2 film due to the presence of nanometer-sized pores. In order to apply this excellent material to thermal insulation fields, it is important to ensure the thermal stability of the pore structure at high temperature as well as thermal conductivity. In this study, ordered mesoporous SiO 2 films were synthesized with various amounts of surfactant, and heat treatment at various temperatures was conducted with the synthesized films to confirm their thermal stabilities. Pore structure degradation of the mesoporous SiO 2 film was observed with increasing temperature of the heat treatment as measured by grazing incidence small angle X-ray scattering. However, mesoporous SiO 2 films with highly-ordered pore arrangements showed enhanced thermal stability and maintained their pore structures during additional heat treatment at higher temperatures. The mechanical properties and thermal conductivity of the ordered mesoporous SiO 2 films with thermal stability at high temperature were analyzed.

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