Dielectric dispersion, linear and nonlinear optical properties of Li2O–WO3–B2O3: V2O5 glasses

• Published in: Journal of advanced dielectrics Vol. 10; no. 3; pp. 2050006-1 - 2050006-8
• Main Authors: Srinivasa Rao, Linganaboina, Thirmal, Chinthakuntla, Raghavendra Rao, Parchuri
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 01-06-2020; World Scientific Publishing Co. Pte., Ltd; World Scientific Publishing
• Subjects: Boron; Boron oxides; Dielectric properties; Electric polarization; electronic polarizability; Lithium oxides; Nonlinear optics; optical band gap; Optical properties; third-order nonlinear optical susceptibility; Tungsten oxides; Vanadium pentoxide; electronic polarizability; Dielectric properties; third-order nonlinear optical susceptibility; optical band gap
• ISSN: 2010-135X; 2010-1368
• DOI: 10.1142/S2010135X2050006X

40 Li2O–5 WO3–(55-
x
) B2O3:
x
V2O5 (mol%) for
0
.
0
≤
x
≤
0
.
8
glasses were prepared by melt-quenching. Electric polarization was described in terms of the dielectric constant (
ε
′
) and loss (
tan
δ
). Mixed conduction phenomenon was explained by redox pairs
V
4
+
↔
V
5
+
and
W
5
+
↔
W
6
+
at high temperatures. Electronic polarizability (
α
e
) was determined over a range of frequencies (100
Hz–100
kHz) and temperatures (30–
2
8
0
∘
C). The change of boron coordination in the glass network was explained with the aid of temperature coefficient of polarizability (
ϕ
). Nonlinear susceptibility (
χ
(
3
)
) and optical band gap (
E
o
) were studied as a function of concentration of V2O5. The highest values of
α
e
and
χ
(
3
)
were obtained at
x
=
0
.
6
mol%. These glasses may find potential practical applications in the fields of solid-state ionics and nonlinear optics.