Anomalous elastic behaviour of xSrO-10PbO-(90-x)B2O3 glass system

2016 ◽  
Vol 444 ◽  
pp. 55-63 ◽  
Author(s):  
Nurul Syahidah Sabri ◽  
A.K. Yahya ◽  
R. Abd-Shukor ◽  
Mahesh Kumar Talari
2013 ◽  
Vol 22 ◽  
pp. 278-283
Author(s):  
A. EDUKONDALU ◽  
M. A. SAMEE ◽  
SHAIKH KAREEM AHMMAD ◽  
SAIR MD. TAQIULLAH ◽  
SYED RAHMAN ◽  
...  

Mixed alkali tungsten borate glasses xLi2O–(30–x) K2O–10WO3–60B2O3 (0 < x < 30) were prepared from the melts. These glasses were characterized using X-ray diffraction, differential scanning calorimetry and density measurements. Optical absorption studies were carried out as a function of alkali content to look for mixed alkali effect (MAE) on the spectral properties of these glasses. From the study of ultraviolet absorption edge, the optical band gap energies and Urbach energies were evaluated. The average electronic polarizability of the oxide ion, optical basicity and the interaction parameters were also evaluated for all the glasses. Many of these parameters vary non-linearly exhibiting a minima or maxima with increasing alkali concentration, indicating the mixed alkali effect. An attempt is made to interpret MAE in this glass system in terms of its glass structure.


2020 ◽  
Vol 46 (11) ◽  
pp. 19343-19353 ◽  
Author(s):  
Nimitha S. Prabhu ◽  
K. Sharmila ◽  
H.M. Somashekarappa ◽  
G. Lakshminarayana ◽  
Soumen Mandal ◽  
...  
Keyword(s):  

2004 ◽  
Vol 132 (3-4) ◽  
pp. 235-240 ◽  
Author(s):  
P. Syam Prasad ◽  
B.V. Raghavaiah ◽  
R. Balaji Rao ◽  
C. Laxmikanth ◽  
N. Veeraiah

2020 ◽  
Vol 46 (4) ◽  
pp. 5380-5386 ◽  
Author(s):  
Y. Al-Hadeethi ◽  
M.I. Sayyed ◽  
J. Kaewkhao ◽  
Bahaaudin M. Raffah ◽  
Rahma Almalki ◽  
...  

2008 ◽  
Vol 354 (42-44) ◽  
pp. 4777-4785 ◽  
Author(s):  
C. Fredericci ◽  
H.N. Yoshimura ◽  
A.L. Molisani ◽  
H. Fellegara

2014 ◽  
Vol 1073 ◽  
pp. 164-173 ◽  
Author(s):  
D. Rajeswara Rao ◽  
G. Sahaya Baskaran ◽  
P. Ramesh Babu ◽  
Y. Gandhi ◽  
N. Veeraiah

2009 ◽  
Vol 02 (03) ◽  
pp. 127-130 ◽  
Author(s):  
LINGANABOINA SRINIVASA RAO ◽  
TUMU VENKATAPPA RAO

With in glass forming region of Li2O–WO3–B2O3 glass system, a particular composition 40Li2O–5WO3–(55 –x) B2O3 : x V2O5 (with x ranging from 0.2 to 0.8, all are in mol.%) is chosen. The DSC traces are obtained to identify the glass transition temperature ( Tg ) and the glass forming ability of all the glass samples. The ESR and IR spectra portray the local structure of the glass system and valance states of the vanadium ions in the glass matrix. As the content of V2O5 increases up to 0.6 mol.% in the glass system, a gradual conversion of vanadium ions from V5+ state to V4+ state is observed, causing the depolymerization in the glass matrix by the transformation of several glass forming units BO4 → BO3 and WO4 → WO6 .


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