Publikace detail

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

Autoři: Kotková Kateřina | Tichá Helena | Tichý Ladislav

Rok: 2008

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Raman Spectroscopy

Název nakladatele: John Wiley & Sons Ltd.

Místo vydání: Chichester

Strana od-do: 1219-1226

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Raman studies and optical properties of some(PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses	Five (PbO)x(Bi2O3)0.2(B2O3)0.8-x glasses, where x = 0, 0.2, 0.3, 0.4 and 0.6, were prepared. The dilatometric glass transition temperature (Tg) was found in the region 470 .x = 0/ (0,5) Tg (C) (0,5) 347 (x = 0.6), and the density (r) varied within 4.57 .x = 0/ r (g/cm3) 8.31 (x = 0.6). Raman spectra indicated the conversion of BO3 to BO4 entities for low x values but for x (more) 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 (Eg)were determined to be in the range 4.03 .x = 0/ (0,5) Eg (eV) (0,5) 3.08 (x = 0.6). The temperature (T) dependence of the optical gap (Eg(T)) in the region 300 T(K) 600 was examined and approximated by a linear relationship of the form of Eg.T/ = Eg.0/− gT, where g x 10−4(eV/K) varied from 5.1 to 6.8. The non-linear refractive index (n2) was estimated from the optical gap values and it was found to correspond to the n2 values calculated from the experimental third-order non-linear optical susceptibility taken from the literature.	Raman spectroscopy; borate glasses; optical properties
eng	Raman studies and optical properties of some(PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses	Five (PbO)x(Bi2O3)0.2(B2O3)0.8-x glasses, where x = 0, 0.2, 0.3, 0.4 and 0.6, were prepared. The dilatometric glass transition temperature (Tg) was found in the region 470 .x = 0/ (0,5) Tg (C) (0,5) 347 (x = 0.6), and the density (r) varied within 4.57 .x = 0/ r (g/cm3) 8.31 (x = 0.6). Raman spectra indicated the conversion of BO3 to BO4 entities for low x values but for x (more) 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 (Eg)were determined to be in the range 4.03 .x = 0/ (0,5) Eg (eV) (0,5) 3.08 (x = 0.6). The temperature (T) dependence of the optical gap (Eg(T)) in the region 300 T(K) 600 was examined and approximated by a linear relationship of the form of Eg.T/ = Eg.0/− gT, where g x 10−4(eV/K) varied from 5.1 to 6.8. The non-linear refractive index (n2) was estimated from the optical gap values and it was found to correspond to the n2 values calculated from the experimental third-order non-linear optical susceptibility taken from the literature.	Raman spectroscopy; borate glasses; optical properties

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