Spectroscopic and dielectric properties of ZnF2–As2O3–TeO2 glass system doped with V2O5

2009 ◽  
Vol 404 (8-11) ◽  
pp. 1450-1464 ◽  
Author(s):  
Y. Gandhi ◽  
N. Venkatramaiah ◽  
V. Ravi Kumar ◽  
N. Veeraiah
2016 ◽  
Vol 846 ◽  
pp. 161-171 ◽  
Author(s):  
Siti Shafinas Zulkefly ◽  
Halimah Mohamed Kamari ◽  
Muhammad Nor Azlan Abdul Azis ◽  
Wan Mohd Daud Wan Yusoff

Glasses of the system {[ (TeO2)70 (B2O3)30]70 (ZnO)30}100-y (Er2O3)y containing different concentration of Er2O3 (ranging from 0 to 5 mol %) was prepared from melt-quenching technique. The structural changes were studied by XRD analysis and FTIR analysis. The XRD pattern shows the glasses are amorphous. The higher concentration of Er2O3, the more unit of TeO3 would transform to TeO4 and formation of B-O vibrational groups. The density and molar volume was obtained attribute to non-bridging oxygen (NBO) and are found the density and molar volume of the glass system are increasing. The densities range from 3630 kg/m3 to 3960 kg/m3. The dielectric constant ε’ and dielectric loss factor ε’’ which were characterized in the frequency range 10-2 – 106 Hz over temperature range 50°C – 200 °C, show a larger value at lower frequency and higher temperature (above 110°C ). The results of dielectric response measurement show that interfacial polarization at low frequency, and orientation polarization at intermediate and high frequency.Keywords: Dielectric properties; Activation Energy; Rare Earth; Polarization; Non-Bridging Oxygen;


2000 ◽  
Vol 276 (1-3) ◽  
pp. 151-158 ◽  
Author(s):  
V.Q. Nguyen ◽  
J.S. Sanghera ◽  
I.K. Lloyd ◽  
I.D. Aggarwal ◽  
D. Gershon

2005 ◽  
Vol 91 (2-3) ◽  
pp. 381-390 ◽  
Author(s):  
P. Nageswara Rao ◽  
B.V. Raghavaiah ◽  
D. Krishna Rao ◽  
N. Veeraiah

2021 ◽  
Vol 57 (7) ◽  
pp. 681-687
Author(s):  
O. Bošák ◽  
M. Kubliha ◽  
P. Kostka ◽  
S. Minarik ◽  
M. Domankova ◽  
...  

2012 ◽  
Vol 19 (06) ◽  
pp. 1250063 ◽  
Author(s):  
ZHAO DU ◽  
XUEHONG ZHANG ◽  
YUNLONG YUE ◽  
HAITAO WU

The effect of MgO on structure and dielectric properties of aluminoborosilicate glasses was investigated. FTIR data indicated that glass network was mainly built by tetrahedral [ SiO4 ], [ BO4 ], [ AlO4 ] and trigonal [ BO3 ]. A small amount of AlO5 or AlO6 units also existed. The glass system was characterized with lower dielectric constant (4.17 ~ 4.6) and dielectric loss (12.3 × 10-4 ~ 14.77 × 10-4) at 1 MHz. With the increase of MgO content, the quantity of AlO5 or AlO6 units decreased. The variation of density showed a decreasing tendency. The dielectric constant and loss were all found to decrease.


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