Structural and luminescent investigation of Eu3+ doped lead borosilicate glasses

2016 ◽  
Author(s):  
M. Reddi Babu ◽  
N. Madhusudhana Rao ◽  
A. Mohan Babu ◽  
N. Jaidass ◽  
C. Krishna Moorthy ◽  
...  
Keyword(s):  
Borosilicate Glasses ◽  
Luminescent Investigation

scholarly journals Corrosion of ternary borosilicate glass in acidic solution studied in operando by fluid-cell Raman spectroscopy

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Christoph Lenting ◽  
Thorsten Geisler
Keyword(s):  
Raman Spectroscopy ◽  
Nuclear Waste ◽  
Numerical Models ◽  
Adsorbed Water ◽  
Corrosion Mechanism ◽  
Borosilicate Glasses ◽  
Long Term Storage ◽  
In Operando ◽  
High Level ◽  
Fluid Cell

AbstractFluid-cell Raman spectroscopy is a space and time-resolving application allowing in operando studies of dynamic processes during solution–solid interactions. A currently heavily debated example is the corrosion mechanism of borosilicate glasses, which are the favoured material for the immobilization of high-level nuclear waste. With an upgraded fluid-cell lid design made entirely from the glass sample itself, we present the polymerization of the surface alteration layer over time in an initially acidic environment, including the differentiation between pore and surface-adsorbed water within it. Our results support an interface-coupled dissolution-precipitation model, which opposes traditional ion-exchange models for the corrosion mechanism. A sound description of the corrosion mechanism is essential for reliable numerical models to predict the corrosion rate of nuclear waste glasses during long-term storage in a geological repository.

Atomic‐Scale Mechanisms of Densification in Cold‐Compressed Borosilicate Glasses

2021 ◽  
Author(s):  
Kuo‐Hao Lee ◽  
Yongjian Yang ◽  
Linfeng Ding ◽  
Benedikt Ziebarth ◽  
Mark J. Davis ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Borosilicate Glasses

scholarly journals Optical studies on Tb3+: Dy3+ singly and doubly doped Borosilicate glasses for white light and solid state lighting applications

2020 ◽  
Vol 534 ◽  
pp. 119943
Author(s):  
Kh.A. Bashar ◽  
W.L. Fong ◽  
Kh.A. Haider ◽  
S.O. Baki ◽  
M.H.M. Zaid ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Solid State Lighting ◽  
Borosilicate Glasses ◽  
Optical Studies

First Principles Calculations of Stress-Induced Structural Changes of Supercooled Borosilicate Glass

2016 ◽  
Vol 725 ◽  
pp. 399-404
Author(s):  
Kausala Mylvaganam ◽  
Wei Dong Liu ◽  
Liang Chi Zhang
Keyword(s):  
Uniaxial Compression ◽  
Borosilicate Glass ◽  
Structural Changes ◽  
Mass Density ◽  
Glass Network ◽  
Borosilicate Glasses ◽  
First Principles Calculations ◽  
Sodium Borosilicate Glass ◽  
Compression Direction ◽  
Network Form

Unlike the traditional silicate glasses, borosilicate glasses behave differently because of the addition of boron atoms. Extensive studies have been carried out to understand the abnormal function of boron in glass network. However, it is not clear how the atomic structure of borosilicate glass changes under loading. This paper investigates the behaviour of borosilicate glass under uniaxial compression with the aid of ab initio simulations. Sodium borosilicate glass having 160 atoms and a mass density of 2.51 g/cm3 with composition 3Na2O-B2O3-6SiO2 were equilibrated first at 3500K, then at 2500K, 1500K, 1200K, 1000K, 825K and 625K. Structural analysis showed that at higher temperatures the sodium borosilicate liquid does not have a specific structure. At around 825 K (i.e. around Tg), boron network and silicon network form and remain stable even at a temperature of 625 K. When the supercooled sample at 825K was subjected to uniaxial compression, the stress along the compression direction first increases and then decreases with a change in boron structure, which could modify the behaviour of the borosilicate glass.

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