Abstract
In this study, (80-
x
) NaPO
3
-20 ZnO-(
x
-
y
) V
2
O
5
-y Er
2
O
3
glasses (
x
= 25, 35, 45,
y
=0mol %), and
x
=44,
y
=1mol%) were elaborated using melt quenching method. X-ray diffraction of the glasses was done to check the amorphous state. DSC studies have shown a thermal stability of the compounds. The changes caused by the addition of V
2
O
5
and Er
2
O
3
on the structure of these glasses were studied by recording the FTIR spectra over the range 200 to 4000 cm
−1
. Complex dielectric permittivity measurements of the glasses in the frequency range from 1 kHz to 10 MHz and at room temperature were studied. A decrease of the real part of the dielectric permittivity with frequency was observed. The frequency dependence of the dielectric permittivity was analyzed in the framework of the Cole-Cole model. The dielectric loss of the prepared glasses decreased with the addition of Er
2
O
3
. Hence, the dielectric loss tanδ of the glasses is a very important behavior because of their possible use in nonlinear optics.