A Review of the Electrical Properties and Microstructure of Vanadium Phosphate Glasses

Elastic properties and structural studies on lead–boro–vanadate glasses

“…shows the MAS-NMR spectra of representative lead-boro-vanadate glasses. The spectra are typical of borate glasses with broad outer peaks generally linked to boron in three fold coordination [BO 3 À B 4 centered around -0.3 ppm (with respect to resonance signal of trimethyl boron). Thus, all the spectra have the appearance of a B 4 resonance peak with wings at the base as expected in glasses containing boron in dual coordination.…”

“…Density measurements were performed using Archimede's method with benzene (density = 0.879 gm/cm 3 ) as an immersion liquid. The accuracy of the measurement was ±0.005 gm/cm 3 . The molar volume was calculated using the relation M V = M/ q where M is the molecular weight and q is the density.…”

“…M 2 O 3 , MO 2 , M 2 O 5 (where M = B, Si or P) are the archetypal glass forming oxides and are respectively tri, tetra and pentavalent elements where MÀO bonds are covalent enough to create simple local structures, but ionic enough to allow deformation of bond angles and consequently destruction of long range order [4]. Oxides such as TeO 2 , V 2 O 5 , MoO 3 , WO 3 , Bi 2 O 3 , etc. do not form glass on their own, but they readily form glass when mixed with a second glass forming oxide [8].…”

“…Oxide glasses doped with the transition metal oxides such as V 2 O 5 , MoO 3 , WO 3 , TiO 2, CuO, Fe 2 O 3 etc. are known to exhibit semiconducting properties and hence these glasses have been extensively studied from the cathode point of view of batteries [1][2][3][4].…”

“…are known to exhibit semiconducting properties and hence these glasses have been extensively studied from the cathode point of view of batteries [1][2][3][4]. The concentration of TMO (for example V 2 O 5 in vanadate glasses) plays an active role in semiconducting glasses [5,6].…”