Investigation of iron redox ratio in zinc borate glass prepared in microwave heating and comparison with conventional glass

2016 ◽  
Vol 450 ◽  
pp. 12-17 ◽  
Author(s):  
Biswajit Mandal ◽  
Avik Halder ◽  
Prasanta Kumar Sinha ◽  
Ranjan Sen ◽  
Ashis Kumar Mandal
Keyword(s):  
Microwave Heating ◽  
Borate Glass ◽  
Zinc Borate ◽  
Redox Ratio ◽  
Iron Redox

Mechanical property optimization of a zinc borate glass by lanthanum doping

2019 ◽  
Vol 520 ◽  
pp. 119461 ◽  
Author(s):  
Kacper Januchta ◽  
Randall E. Youngman ◽  
Lars R. Jensen ◽  
Morten M. Smedskjaer
Keyword(s):  
Mechanical Property ◽  
Borate Glass ◽  
Zinc Borate ◽  
Lanthanum Doping

Homogeneous line width in a zinc borate glass activated by Eu3+

1997 ◽  
Vol 220 (2-3) ◽  
pp. 217-221 ◽  
Author(s):  
M. Sbetti ◽  
E. Moser ◽  
M. Montagna ◽  
M. Ferrari ◽  
S. Chaussedent ◽  
...  
Keyword(s):  
Line Width ◽  
Borate Glass ◽  
Zinc Borate

Redox State and Transition Metal Concentration Effects on Microstructure of Simulated Simplified Glasses for Waste Immobilization

1995 ◽  
Vol 412 ◽  
Author(s):  
C.-W. Kim ◽  
I. S. Muller ◽  
A. C. Buechele ◽  
I. L. Pegg ◽  
P. B. Macedo
Keyword(s):  
Solubility Limit ◽  
Aluminosilicate Glass ◽  
Enthalpies Of Solution ◽  
Concentration Effects ◽  
Redox Ratio ◽  
Redox States ◽  
Waste Immobilization ◽  
Temperature Transformation ◽  
Using Data ◽  
Iron Redox

AbstractChromium, iron, and nickel are present in many waste-streams from DOE sites. This study considers a simplified lime-aluminosilicate glass system, similar to one proposed for high temperature (1250–1450°C) vitrification of soil and wastes from DOE sites, in which concentrations of Cr, Fe. and Ni are being varied and different redox states induced for selected melting conditions. The solubilities of Cr 2O3 and NiO in the simplified system are determined at 1350°C, 1400°C, and 1450°C. The enthalpies of solution calculated from the solubility data for Cr2O3 and NiO are 12.2 and 15.2 kcal/mol, respectively. The iron redox ratio, Fe2+/Fetotal in selected glasses is determined by Mössbauer Spectroscopy and related to changes in microstructure. The crystallization of eskolaite (Cr2O3) seems to be favored at intermediate states of reduction (Fe2+/Fetotal ≈0.8) in Cr-containing glass at near the solubility limit. Pseudoternary diagrams are plotted for melts in air at 1450°C in which Fe2O3 + SiO2 + X (X = NiO or Cr2O33) is held constant. Time-Temperature-Transformation (TTT) curves are plotted using data from heat treatment studies. Liquidus temperatures of base, 1.5 wt% Cr2O3 glass and 8 wt% NiO, 7 wt% Fe2O3 glass are found to be 1150°C, 1175°C, and 1175°C, respectively.

Precipitation of ZnO in Al2O3-doped zinc borate glass ceramics

2011 ◽  
Vol 33 (12) ◽  
pp. 1980-1983 ◽  
Author(s):  
Hirokazu Masai ◽  
Takahiro Ueno ◽  
Yoshihiro Takahashi ◽  
Takumi Fujiwara
Keyword(s):  
Borate Glass ◽  
Glass Ceramics ◽  
Zinc Borate

Absorption and luminescence spectroscopy of Nd3+ and Er3+ in a zinc borate glass

1996 ◽  
Vol 97 (6) ◽  
pp. 521-525 ◽  
Author(s):  
Giorgio Pozza ◽  
David Ajò ◽  
Marco Bettinelli ◽  
Adolfo Speghini ◽  
Maurizio Casarin
Keyword(s):  
Borate Glass ◽  
Zinc Borate ◽  
Luminescence Spectroscopy
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