modifier oxide
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2021 ◽  
Author(s):  
Kh. S. shaaban

Abstract Glasses with the chemical composition of 52B2O3 – 12SiO2- 26Bi2O3 – (10 - x ) TiO2 - xY2O3, : (0 ≤ x ≥ 10 )prepared using the melt-quench method. The goal of this study is to investigate the structural, thermal, and crystallization characteristics of these samples. XRD analysis has explored the nature of the glass system. Molar volume obtained reduced while the density denotes increased in the present system. FTIR analysis revealed that as Y2O3 replaced by TiO2, because of an increasing trend in bridging oxygens (BOs), structural units and interconnection of modifier oxide tetrahedral increment, while non-bridging oxygens (NBOs) reduce. These glasses' thermal stability investigated using DTA. As the concentration of Y2O3 increased, so the thermal parameter values. The glass-ceramic denoted prepared under controlled heat and investigated using XRD & SEM. Ultrasonic velocities and elastic moduli of glass-ceramic samples increase as internal energy increases. The significance of Y2O3 modifier in the glass system signifies proved. Y2O3 is a powerful nucleating agent that can cause crystallization, assisting in the formation of glass-ceramic phases.


2021 ◽  
Author(s):  
kh. S. Shaaban

Abstract Glasses with the chemical composition of 52B2O3 – 12SiO2- 26Bi2O3 – (10-x)TiO2 -xY2O3, :(0 ≤ x ≥10)prepared using the melt-quench method. The goal of this study is to investigate the structural, thermal, and crystallization characteristics of these samples. XRD analysis has explored the nature of the glass system. Molar volume obtained reduced while the density denotes increased in the present system. FTIR analysis revealed that as Y2O3 replaced by TiO2, because of an increasing trend in bridging oxygens (BOs), structural units and interconnection of modifier oxide tetrahedral increment, while non-bridging oxygens (NBOs) reduce. These glasses' thermal stability investigated using DTA. As the concentration of Y2O3 increased, so the thermal parameter values. The glass-ceramic denoted prepared under controlled heat and investigated using XRD & SEM. Ultrasonic velocities and elastic moduli of glass-ceramic samples increase as internal energy increases. The significance of Y2O3 modifier in the glass system signifies proved. Y2O3 is a powerful nucleating agent that can cause crystallization, assisting in the formation of glass-ceramic phases.


2018 ◽  
Vol 498 ◽  
pp. 309-314 ◽  
Author(s):  
G. Naga Raju ◽  
P. Venkateswara Rao ◽  
V. Ravi Kumar ◽  
Ch. Chandrakala ◽  
J. Ashok

2018 ◽  
Vol 5 (13) ◽  
pp. 26191-26198
Author(s):  
A. Ashirvadam ◽  
Valluri. Ravi Kumar ◽  
G. Naga Raju
Keyword(s):  

2017 ◽  
Vol 692 ◽  
pp. 219-226 ◽  
Author(s):  
P. Sobhanachalam ◽  
Ch Vijaya Kumari ◽  
G. Sahaya Baskaran ◽  
P. Syam Prasad ◽  
N. Veeraiah ◽  
...  

2016 ◽  
Vol 60 ◽  
pp. 594-600 ◽  
Author(s):  
Valluri Ravi kumar ◽  
G. Giridhar ◽  
N. Veeraiah
Keyword(s):  

2014 ◽  
Vol 586 ◽  
pp. 159-168 ◽  
Author(s):  
K. Neeraja ◽  
T.G.V.M. Rao ◽  
A. Rupesh Kumar ◽  
N. Veeraiah ◽  
M. Rami Reddy

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