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

Rasmus Rosenlund Petersen; Jakob König; Morten Mattrup Smedskjær; Yuanzheng Yue

doi:10.1016/j.jnoncrysol.2014.04.029

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

Rasmus Rosenlund Petersen, Jakob König, Morten Mattrup Smedskjær, Yuanzheng Yue

Research output: Contribution to journal › Journal article › Research › peer-review

45 Citations (Scopus)

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.

Original language	English
Journal	Journal of Non-Crystalline Solids
Volume	400
Pages (from-to)	1-5
Number of pages	5
ISSN	0022-3093
DOIs	https://doi.org/10.1016/j.jnoncrysol.2014.04.029
Publication status	Published - 2014

Keywords

Foamg glass
viscous sintering
glass transition temperature
Na2CO3 decomposition

Access to Document

10.1016/j.jnoncrysol.2014.04.029

AUB Link

Search for the material in Aalborg University Library's search engine

Cite this

@article{bb9deb6b90ea4cb79bc2bd83fe2aedb5,

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",

publisher = "Elsevier",

}

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

SN - 0022-3093

VL - 400

SP - 1

EP - 5

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

ER -

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

Abstract

Keywords

Access to Document

AUB Link

Fingerprint

Cite this