Composition dependence of the infrared absorption spectra of molybdenum phosphate glasses and some crystalline analogues

Bridge, B.; Patel, N. D.

doi:10.1016/s0022-3093(87)80083-2

Cited by 64 publications

(25 citation statements)

References 19 publications

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“…As can be seen, the IR spectra are dominated by the vibrational modes of the phosphate tetrahedral. A strong broad absorption occurring between 3,200 and 3,400 cm −1 and a weaker one in the region of 1,600-1,660 can be assigned to the stretching and bending of the OH bonds, respectively [10,12,13]. The incorporation of water in the glasses might possibly happen during the preparation of the pellets for infrared measurements.…”

Section: Resultsmentioning

confidence: 99%

Optical and electrical characteristics of (LiCl) x (P2O5)1 − x glass

Talib

Daud

Loh

et al. 2008

Ionics

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Homogeneous (LiCl) x (P 2 O 5 ) 1 − x glasses were synthesised using a melt-quenching method for x=0.1-0.6 in the interval of 0.05. The amorphous structure of the samples was evident by the X-ray diffraction spectrum. The short range structures of the binary phosphate samples were examined by Fourier transform infrared spectroscopy, whilst the density of the samples was measured as supportive data for the investigations. The results of refractive indices as measured using an ellipsometer reveal the homogeneity of samples and was found to depend on the glass composition. The electrical properties of the glasses were investigated by ac impedance spectroscopy from 10 mHz to 1 MHz for temperatures ranging from room temperature to 573 K. An estimation of the bulk resistivity was obtained by taking the intercepts on the real axis at low frequencies of the complex impedance plot. The dc conductivities derived from the reciprocal of resistivity values were found to obey the Arrhenius relationship, and its activation energy shows a decreasing trend with the increase in LiCl content in the glass. Lastly, an equivalent circuits consisting of real and complex capacitors is proposed to describe the dielectric response of the glass.

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Section: Resultsmentioning

confidence: 99%

Optical and electrical characteristics of (LiCl) x (P2O5)1 − x glass

Talib

Daud

Loh

et al. 2008

Ionics

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“…1. Previous workers (11,12) have found that the vibrational bands of inorganic phosphates are generally not very sensitive to the cations in the structure, which tend just to shift the band frequencies slightly rather than to create new bands. Thus, the IR spectrum is dominated by the HPO\ modes.…”

Section: A Initial Characterizationmentioning

confidence: 95%

Investigation of the Alkaline Earth Phosphates: Synthesis and Crystal Structure of a New Strontium Hydrogen Phosphate Form

Taher

Smiri

Laligant

et al. 2000

Journal of Solid State Chemistry

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“…The Mo 6+ ions are expected to participate in the glass network with tetrahedral MoO 4 2-structural units and may alternate with BO 4 tetrahedral units. Most of the studies available on MoO 3 containing glasses are on the understanding of their structure by spectroscopic investigations [16,17] and ionic conductivity studies [18].…”

Section: Introduction:-mentioning

confidence: 99%

SPECTROSCOPIC PROPERTIES OF LITHIUM SODIUM BORATE GLASS BY THE ADDITION OF MoO3.

Sugathri.¹,

Rao²

2017

IJAR

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1 mol %) were prepared by melt quenching are studied. Spectroscopic (XRD, infrared, optical absorption spectra and EPR) properties of these glasses have been carried out. As the concentration of MoO 3 is increased especially beyond 0.4 mol %, the colour of the glasses increased, which is indicating the reduction of molybdenum ions from …………………………………………………………………………………………………….... Introduction:-The glasses containing transition metal ions came into prominence because of their notable spectroscopic properties and their suitability for fibre optic communications, luminescent solar energy concentrators (LSC) [1].Among the many glasses, borate glasses have been known to be excellent host materials for transition metal oxides because of their glass forming nature compared to other conventional glass systems. Borate glasses are used as wave-guides, electro-optic switches, electro-optic modulators, magneto-optic materials, solid-state laser materials and non-linear optical parametric converters [2][3][4]. In addition, they are often used as dielectric and insulating materials and it is known that borate glass constitute a good shield against IR radiation [5]. In general B 2 O 3 glasses have a property of showing minimum expansion due to the large amount of boric oxide which is of great importance in obtaining thermal durability. It also decreases the tendency for glass to devitrify or crystallize. B 2 O 3 is a basic glass former because of its higher bond strength, lower cation size and smaller heat of fusion. The ions of molybdenum introduce high activity and selectivity in a series of oxidation reactions of practical importance in the glass matrices [6,7].Molybdenum oxide belongs to the intermediate class of glass forming oxides. It does not readily form the glass but does so in the presence of the modifier with MoO 4 . Molybdenum ions in the glasses have been the subject of many investigations due to their catalytic properties. Interesting studies are available on the environment of molybdenum ion in different inorganic glasses [8][9][10][11][12][13]. Mo-O bond in molybdenum hexavalent oxide is identified as significantly covalent. The Mo ion exist a stable valence state viz., MoV and MoVI in the glass network. Molybdenum ions act both as network formers as well as network modifiers depending upon their concentration and nature of the host network.Mo−O bond in molybdenum hexavalent oxide is identified as covalent. The Mo ion exists at least in two

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Composition dependence of the infrared absorption spectra of molybdenum phosphate glasses and some crystalline analogues

Cited by 64 publications

References 19 publications

Optical and electrical characteristics of (LiCl) x (P2O5)1 − x glass

Optical and electrical characteristics of (LiCl) x (P2O5)1 − x glass

Investigation of the Alkaline Earth Phosphates: Synthesis and Crystal Structure of a New Strontium Hydrogen Phosphate Form

SPECTROSCOPIC PROPERTIES OF LITHIUM SODIUM BORATE GLASS BY THE ADDITION OF MoO3.

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