Abstract

The understanding of the thermal transport mechanism of foam glass is still lacking. The contribution of solid- and gas conduction to the total thermal conductivity remains to be reported. In many foam glasses, the solid phase consist of a mix of an amorphous and a crystalline part where foaming agents can be partially dissolved into the glass structure. We investigate the influence of incorporation of residues from foaming agents (MnO2 and Fe2O3) on the solid conductivity of cathode ray-tube (CRT) panel glass. We have prepared samples by sintering and melt-quenching technique to obtain samples containing glass and crystalline foaming agents and amorphous samples where the foaming agents are completely dissolved in the glass structure, respectively. Results show that the samples prepared by sintering have a higher thermal conductivity than the samples prepared by melt-quenching. The thermal conductivities of the sintered and the melt-quenched samples represent an upper and lower limit of the solid phase thermal conductivity of foam glasses prepared with these foaming agents. The content of foaming agents dissolved in the glass structure has a major impact on the solid thermal conductivity of foam glass. Hence, the solid thermal conductivity of foam glass can be optimized by altering the foaming agent and its content.
Original languageEnglish
JournalJournal of Non-Crystalline Solids
Volume465
Pages (from-to)59-64
Number of pages6
ISSN0022-3093
DOIs
Publication statusPublished - 2017

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Thermal conductivity of solids
cathode ray tubes
foaming
Blowing agents
Cathode ray tubes
foams
Foams
thermal conductivity
Glass
glass
Thermal conductivity
solid phases
Quenching
sintering
Sintering
quenching
Crystalline materials

Keywords

  • Thermal conductivity
  • Viscous sintering
  • CRT panel glass
  • Heat capacity

Cite this

@article{02f76c0a24e4435a8ea52443a4ff52e0,
title = "Influence of foaming agents on solid thermal conductivity of foam glasses prepared from CRT panel glass",
abstract = "The understanding of the thermal transport mechanism of foam glass is still lacking. The contribution of solid- and gas conduction to the total thermal conductivity remains to be reported. In many foam glasses, the solid phase consist of a mix of an amorphous and a crystalline part where foaming agents can be partially dissolved into the glass structure. We investigate the influence of incorporation of residues from foaming agents (MnO2 and Fe2O3) on the solid conductivity of cathode ray-tube (CRT) panel glass. We have prepared samples by sintering and melt-quenching technique to obtain samples containing glass and crystalline foaming agents and amorphous samples where the foaming agents are completely dissolved in the glass structure, respectively. Results show that the samples prepared by sintering have a higher thermal conductivity than the samples prepared by melt-quenching. The thermal conductivities of the sintered and the melt-quenched samples represent an upper and lower limit of the solid phase thermal conductivity of foam glasses prepared with these foaming agents. The content of foaming agents dissolved in the glass structure has a major impact on the solid thermal conductivity of foam glass. Hence, the solid thermal conductivity of foam glass can be optimized by altering the foaming agent and its content.",
keywords = "Thermal conductivity, Viscous sintering, CRT panel glass, Heat capacity",
author = "{\O}stergaard, {Martin Bonderup} and Petersen, {Rasmus Rosenlund} and Jakob K{\"o}nig and Hicham Johra and Yuanzheng Yue",
year = "2017",
doi = "10.1016/j.jnoncrysol.2017.03.035",
language = "English",
volume = "465",
pages = "59--64",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",

}

TY - JOUR

T1 - Influence of foaming agents on solid thermal conductivity of foam glasses prepared from CRT panel glass

AU - Østergaard, Martin Bonderup

AU - Petersen, Rasmus Rosenlund

AU - König, Jakob

AU - Johra, Hicham

AU - Yue, Yuanzheng

PY - 2017

Y1 - 2017

N2 - The understanding of the thermal transport mechanism of foam glass is still lacking. The contribution of solid- and gas conduction to the total thermal conductivity remains to be reported. In many foam glasses, the solid phase consist of a mix of an amorphous and a crystalline part where foaming agents can be partially dissolved into the glass structure. We investigate the influence of incorporation of residues from foaming agents (MnO2 and Fe2O3) on the solid conductivity of cathode ray-tube (CRT) panel glass. We have prepared samples by sintering and melt-quenching technique to obtain samples containing glass and crystalline foaming agents and amorphous samples where the foaming agents are completely dissolved in the glass structure, respectively. Results show that the samples prepared by sintering have a higher thermal conductivity than the samples prepared by melt-quenching. The thermal conductivities of the sintered and the melt-quenched samples represent an upper and lower limit of the solid phase thermal conductivity of foam glasses prepared with these foaming agents. The content of foaming agents dissolved in the glass structure has a major impact on the solid thermal conductivity of foam glass. Hence, the solid thermal conductivity of foam glass can be optimized by altering the foaming agent and its content.

AB - The understanding of the thermal transport mechanism of foam glass is still lacking. The contribution of solid- and gas conduction to the total thermal conductivity remains to be reported. In many foam glasses, the solid phase consist of a mix of an amorphous and a crystalline part where foaming agents can be partially dissolved into the glass structure. We investigate the influence of incorporation of residues from foaming agents (MnO2 and Fe2O3) on the solid conductivity of cathode ray-tube (CRT) panel glass. We have prepared samples by sintering and melt-quenching technique to obtain samples containing glass and crystalline foaming agents and amorphous samples where the foaming agents are completely dissolved in the glass structure, respectively. Results show that the samples prepared by sintering have a higher thermal conductivity than the samples prepared by melt-quenching. The thermal conductivities of the sintered and the melt-quenched samples represent an upper and lower limit of the solid phase thermal conductivity of foam glasses prepared with these foaming agents. The content of foaming agents dissolved in the glass structure has a major impact on the solid thermal conductivity of foam glass. Hence, the solid thermal conductivity of foam glass can be optimized by altering the foaming agent and its content.

KW - Thermal conductivity

KW - Viscous sintering

KW - CRT panel glass

KW - Heat capacity

U2 - 10.1016/j.jnoncrysol.2017.03.035

DO - 10.1016/j.jnoncrysol.2017.03.035

M3 - Journal article

VL - 465

SP - 59

EP - 64

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -