Investigation of structural, optical and transport properties of MoO3–PbO–B2O3 glasses

Sanjay,; Kishore, N.; Agarwal, Ashish

doi:10.1016/j.jallcom.2009.07.186

Cited by 22 publications

(9 citation statements)

References 24 publications

(29 reference statements)

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“…Molar volume is gradually increased with successive substitution of MgO/CaO/SrO/BaO, suggests increased free space within glass structure and changes in the structure. 13,14 Basicity parameter slightly increases from glass TG4A to TG4D. High optical basicity means high electron donor ability o oxide ions to the cations.…”

Section: Resultsmentioning

confidence: 98%

Spectroscopic characterization of manganese-doped alkaline earth lead zinc phosphate glasses

Sastry

Rao

2015

Bull Mater Sci

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Alkaline earth lead zinc phosphate glasses doped with Mn(II) are characterized by spectroscopic techniques like X-ray diffraction (XRD), UV-visible, differential scanning calorimetry (DSC), electron paramagnetic resonance (EPR), Fourier transform infrared (FTIR) and Raman. Optical absorption spectrum exhibits four bands which are characteristic of Mn(II) in distorted octahedral site symmetry. The crystal field parameter Dq and Racah interelectronic-repulsion parameters B and C have been evaluated. All investigated samples exhibit EPR signals which are characteristic to the Mn 2+ ions. The shapes of spectra are also changed with varying alkaline earth ions content. FTIR spectra show specific vibrations of phosphate units. The characteristic Raman bands of these glasses due to stretching and bending vibrations were identified and analysed by varying alkaline earth content. The intensity and frequency variations for the characteristic phosphate group vibrations have been correlated with the changes of the structural units present in these glasses. Depolymerization of the phosphate chains in all the glasses is observed with replacement of alkaline earth content by spectroscopic studies. This leads to a strong decrease of the average chain length and a small decrease of the average P-O-P bridging angle with replacement of alkaline earth content.

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Section: Resultsmentioning

confidence: 98%

Spectroscopic characterization of manganese-doped alkaline earth lead zinc phosphate glasses

Sastry

Rao

2015

Bull Mater Sci

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“…The growing crystal was rotated at a rate of 20-50 rpm with the rotation direction inverted every 3 min. When the growth was finished after 2-3 months, the crystal was drawn out of the solution and cooled to room temperature at a rate of about 15 uC h 21 .…”

Section: Methodsmentioning

confidence: 99%

“…An intensified charge coupled device (ICCD) was employed as the detector. The spectra of samples were collected by accumulating 30 scans, and each scan time was 6 s. The spectral resolution was 2 cm 21 .…”

Section: High-temperature Raman Spectrummentioning

confidence: 99%

“…It is considered that MoO 3 can effectively cause structural changes in the boronoxygen network by replacing the B-O-B bonds with Mo-O-B and Mo-O-Mo bonds, which results in a weaker connectivity in the boron-oxygen network and hence lower viscosity. 21 On the other hand, the addition of excess Cs 2 O is necessary to compensate for the composition deviation resulting from high evaporation of Cs 2 O for the growth of CBO. Therefore, it can be expected that large size and high quality CBO crystals are directly grown from Cs 2 O-MoO 3 flux.…”

Section: Introductionmentioning

confidence: 99%

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Growth and characterization of CsB3O5 crystals without scattering centers

Liu¹,

Zhang²,

Li³

et al. 2012

CrystEngComm

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“…In glasses, tungsten is admitted to be found as trivalent W 3+ , tetravalent W 4+ , pentavalent W 5+ or as hexavalent W 6+ states or a combination of some of them (3)(4)(5). It has been established that silicate and alkali borate glasses favor the dominance of the hexavalent state of molybdenum and tungsten ions while phosphate glasses generally initiate the trivalent, tetravalent and pentavalent states (6,7).…”

Section: Introductionmentioning

confidence: 99%