Effect of Na2CO3 as Foaming Agent on Dynamics and Structure of Foam Glass Melts

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24 Citationer (Scopus)

Resumé

We investigate the kinetics and dynamics of the reaction between Na2CO3 and the cathode ray tube panel glass powder at 923-1173 K. The reaction causes foaming of the glass melt. After the reaction, the Tg decreases with increasing Na2CO3 content and reaches a minimum value of Tg. However, this Tg value is even lower than that of the homogeneous bulk glass with the same chemical composition. The lower Tg of the foam glass could be attributed to inhomogeneous incorporation of Na in the glass, leading to Na-rich domains that cause an overall decrease of Tg. Remarkably, after 5 min treatment at 1073 K, the Tg drops by 120 K, indicating that the reaction between Na2CO3 and glass is very fast. Increasing treatment duration causes a slight increase of Tg likely due to both a more homogeneous Na distribution and the compositional change of the glass as a result of Na2SrSi2O6 crystal formation.
OriginalsprogEngelsk
TidsskriftJournal of Non-Crystalline Solids
Vol/bind400
Sider (fra-til)1-5
Antal sider5
ISSN0022-3093
DOI
StatusUdgivet - 2014

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foaming
Blowing agents
foams
Foams
Glass
glass
causes
cathode ray tubes
Cathode ray tubes
Powders
chemical composition
Crystals
Kinetics
kinetics
Chemical analysis
crystals

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title = "Effect of Na2CO3 as Foaming Agent on Dynamics and Structure of Foam Glass Melts",
abstract = "We investigate the kinetics and dynamics of the reaction between Na2CO3 and the cathode ray tube panel glass powder at 923-1173 K. The reaction causes foaming of the glass melt. After the reaction, the Tg decreases with increasing Na2CO3 content and reaches a minimum value of Tg. However, this Tg value is even lower than that of the homogeneous bulk glass with the same chemical composition. The lower Tg of the foam glass could be attributed to inhomogeneous incorporation of Na in the glass, leading to Na-rich domains that cause an overall decrease of Tg. Remarkably, after 5 min treatment at 1073 K, the Tg drops by 120 K, indicating that the reaction between Na2CO3 and glass is very fast. Increasing treatment duration causes a slight increase of Tg likely due to both a more homogeneous Na distribution and the compositional change of the glass as a result of Na2SrSi2O6 crystal formation.",
keywords = "Foamg glass, viscous sintering, glass transition temperature, Na2CO3 decomposition",
author = "Petersen, {Rasmus Rosenlund} and Jakob K{\"o}nig and Smedskj{\ae}r, {Morten Mattrup} and Yuanzheng Yue",
year = "2014",
doi = "10.1016/j.jnoncrysol.2014.04.029",
language = "English",
volume = "400",
pages = "1--5",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
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Effect of Na2CO3 as Foaming Agent on Dynamics and Structure of Foam Glass Melts. / Petersen, Rasmus Rosenlund; König, Jakob; Smedskjær, Morten Mattrup; Yue, Yuanzheng.

I: Journal of Non-Crystalline Solids, Bind 400, 2014, s. 1-5.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Effect of Na2CO3 as Foaming Agent on Dynamics and Structure of Foam Glass Melts

AU - Petersen, Rasmus Rosenlund

AU - König, Jakob

AU - Smedskjær, Morten Mattrup

AU - Yue, Yuanzheng

PY - 2014

Y1 - 2014

N2 - We investigate the kinetics and dynamics of the reaction between Na2CO3 and the cathode ray tube panel glass powder at 923-1173 K. The reaction causes foaming of the glass melt. After the reaction, the Tg decreases with increasing Na2CO3 content and reaches a minimum value of Tg. However, this Tg value is even lower than that of the homogeneous bulk glass with the same chemical composition. The lower Tg of the foam glass could be attributed to inhomogeneous incorporation of Na in the glass, leading to Na-rich domains that cause an overall decrease of Tg. Remarkably, after 5 min treatment at 1073 K, the Tg drops by 120 K, indicating that the reaction between Na2CO3 and glass is very fast. Increasing treatment duration causes a slight increase of Tg likely due to both a more homogeneous Na distribution and the compositional change of the glass as a result of Na2SrSi2O6 crystal formation.

AB - We investigate the kinetics and dynamics of the reaction between Na2CO3 and the cathode ray tube panel glass powder at 923-1173 K. The reaction causes foaming of the glass melt. After the reaction, the Tg decreases with increasing Na2CO3 content and reaches a minimum value of Tg. However, this Tg value is even lower than that of the homogeneous bulk glass with the same chemical composition. The lower Tg of the foam glass could be attributed to inhomogeneous incorporation of Na in the glass, leading to Na-rich domains that cause an overall decrease of Tg. Remarkably, after 5 min treatment at 1073 K, the Tg drops by 120 K, indicating that the reaction between Na2CO3 and glass is very fast. Increasing treatment duration causes a slight increase of Tg likely due to both a more homogeneous Na distribution and the compositional change of the glass as a result of Na2SrSi2O6 crystal formation.

KW - Foamg glass

KW - viscous sintering

KW - glass transition temperature

KW - Na2CO3 decomposition

U2 - 10.1016/j.jnoncrysol.2014.04.029

DO - 10.1016/j.jnoncrysol.2014.04.029

M3 - Journal article

VL - 400

SP - 1

EP - 5

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -