摘要
40 Li_(2)O–5WO_(3)–(55-x)B_(2)O_(3):xV_(2)O_(5)(mol%)for 0.0≤x≤0.8 glasses were prepared by melt-quenching.Electric polarization was described in terms of the dielectric constant("0)and loss(tanδ).Mixed conduction phenomenon was explained by redox pairs V^(4+)↔V^(5+)and W^(5+)↔W^(6+) at high temperatures.Electronic polarizability(αe)was determined over a range of frequencies(100 Hz–100 kHz)and temperatures(30–280℃).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°)were studied as a function of concentration of V_(2)O_(5).The highest values ofαe andχ^((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.
基金
The authors wish to thank management of VNRVJIET for their support to accomplish this research work.And,the authors(Dr.L.Srinivasa Rao and Dr.P.Raghavendra Rao)would like to thank Jawaharlal Nehru Technological Uni-versity Hyderabad for awarding a research project(Proc.No.JNTUH/TEQIP-III/CRS/2019/Physics/06).
