Vibrational spectra and structure of heavy metal oxide glasses

Харламов, А. А.; Almeida, Rui M.; Heo, Jong

doi:10.1016/0022-3093(96)00192-5

Cited by 229 publications

(90 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2) we attribute to Bi-O and Bi-O-Bi vibrations in linked, distorted BiO 6 polyhedral units. 28 The presence of bismuth atoms is reflected by an apparent broadening of the RF AC to a high wavenumber region ( Fig. 1 (x D 0)) due to an overlap with the heavy-metal vibrational mode at around 120 cm 1 .…”

Section: Raman Spectra and Structural Considerationmentioning

confidence: 99%

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Kotkova

Tichá

Tichý

2008

J Raman Spectroscopy

View full text Add to dashboard Cite

Five (PbO) x (Bi 2 O 3 ) 0.2 (B 2 O 3 ) 0.8−x glasses, where x = 0, 0.2, 0.3, 0.4 and 0.6, were prepared. The dilatometric glass transition temperature (T g ) was found in the region 470 .x = 0/ ½ T g (°C) ½ 347 (x = 0.6), and the density (r) varied within 4.57 .x = 0/ Ä r (g/cm 3 ) Ä 8.31 (x = 0.6). Raman spectra indicated the conversion of BO 3 to BO 4 entities for low x values but for x > 0.3, namely, for x → 0.6, back-conversion occurred, most probably. From the measurements of the optical transmission on very thin bulk samples, the room temperature optical gap values (E g ) were determined to be in the range 4.03 .x = 0/ ½ E g (eV) ½ 3.08 (x = 0.6). The temperature (T) dependence of the optical gap (E g (T)) in the region 300 Ä T(K) Ä 600 was examined and approximated by a linear relationship of the form of E g .T/ = E g .0/ − gT, where g × 10 −4 (eV/K) varied from 5.1 to 6.8. The non-linear refractive index (n 2 ) was estimated from the optical gap values and it was found to correspond to the n 2 values calculated from the experimental third-order non-linear optical susceptibility taken from the literature.

show abstract

Section: Raman Spectra and Structural Considerationmentioning

confidence: 99%

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Kotkova

Tichá

Tichý

2008

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…This is also supported by the FTIR data. In FTIR the bands between 425 to 550 cm −1 and 800 to 1200 cm −1 are attributed to Bi-O-Bi and Bi-O Vibrations of BiO 6 octahedra [17,20,23]. Ardelean et al [24] has reported a band at 715 cm −1 due to symmetric stretching vibrations of Bi-O bond in BiO 3 pyramidal units.…”

Section: Resultsmentioning

confidence: 98%

Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

et al. 2012

View full text Add to dashboard Cite

Zinc bismuth silicate glasses with compositions 40SiO 2 · xZnO · (60 − x)Bi 2 O 3 (x = 0, 5, 10, 15, 20, 25, 30, 35, and 40) have been prepared by conventional melt-quench technique and the solubility limit of zinc in bismuth silicate glass system has been estimated using X-ray diffraction technique. Density has been measured using Archimedes' principle; with increase in ZnO in the samples, the molar volume and density are found to decrease. The glass transition temperature (T g ) has been determined by using differential scanning calorimetry (DSC) and is observed to increase with increase in ZnO content. Raman and FTIR spectra have been recorded at room temperature and the analysis of Raman and FTIR shows that in all the glass compositions, asymmetric and symmetric stretched vibrations of Si-O bonds in SiO 4 tetrahedral units exist and with decrease in Bi 2 O 3 , the contribution of symmetric vibrations begins to dominate which results in increased compactness of the glass structure.

show abstract

“…Tais materiais foram objeto de um grande número de investigações tanto experimentais quanto teóricas [17][18][19][20][21] . Mais recentemente, além desses vidros típicos, outros tipos de materiais vítreos vêm sendo estudados por espectroscopia no IV, tais quais boratos 16 , fluoretos 22 , fosfatos 23 e óxidos de metais pesados 24 . A principal vantagem dessa técnica é ser direta na investigação de estruturas.…”

Section: Aplicações Materiais Vítreos E Cerâmicosunclassified

“…(ii) Cariati 23 e colaboradores também utilizaram a técnica com sucesso para caracterizar a matriz de fosfato em vidros de fosfato de zinco e cobre. (iii) Almeida e seus colaboradores 17,[23][24][25][26] fazem amplo uso da espectroscopia especular no estudo de vários tipos de materiais vítreos, desde sílica vítrea a óxidos de metais pesados como chumbo e bismuto.…”

Section: Aplicações Materiais Vítreos E Cerâmicosunclassified

Introdução às técnicas de reflexão especular e reflexão-absorção no infravermelho: (1) reflexão especular

Trasferetti¹,

Davanzo²

2001

Quím. Nova

View full text Add to dashboard Cite

Vibrational spectra and structure of heavy metal oxide glasses

Cited by 229 publications

References 24 publications

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

Introdução às técnicas de reflexão especular e reflexão-absorção no infravermelho: (1) reflexão especular

Contact Info

Product

Resources

About

Vibrational spectra and structure of heavy metal oxide glasses

Cited by 229 publications

References 24 publications

Raman studies and optical properties of some (PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses

Raman studies and optical properties of some (PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses

Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

Introdução às técnicas de reflexão especular e reflexão-absorção no infravermelho: (1) reflexão especular

Contact Info

Product

Resources

About

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses