Optical properties of samarium doped zinc–phosphate glasses

Abstract

Samarium doped zinc-phosphate glasses having composition Sm 2 O 3 (x) ZnO (60Àx) P 2 O 5 (40) (where x ¼ 0.1-0.5 mol%) were prepared by melt quenching method. The density of these glasses was measured by Archimedes method; the corresponding molar volumes have also been calculated. The values of density range from 3.34 to 3.87 gm/cm 3 and those of molar volume range from 27.62 to 31.80 cm À3. The optical absorbance studies were carried out on these glasses to measure their energy band gaps. The absorption spectra of these glasses were recorded in UV-visible region. No sharp edges were found in the optical spectra, which verifies the amorphous nature of these glasses. The optical band gap energies for these glasses were found to be in the range of 2.89-4.20 eV. The refractive index and polarizability of oxide ion have been calculated by using Lorentz-Lorentz relations. The values of refractive index range from 2.13 to 2.42 and those of polarizability of oxide ion range from 6.51 Â 10 À24 to 7.80 Â 10 À24 cm 3 .

Optical properties of zinc–vanadium glasses doped with samarium trioxide

“…The mixtures of analytical grade vanadium pentoxide (V 2 O 5 ), zinc oxide (ZnO) and samarium trioxide (Sm 2 O 3 ) were used as starting materials. The detailed experimental procedure was explained in (Eraiah and Sudha 2007). The samples were annealed at 200…”

Comparative study of zinc addition effect on thermal properties of silicate and phosphate glasses

“…Zinc phosphate glasses have been developed for use as LED light sources [1,2] and as substrates for optical waveguides written by f-sec lasers [3][4][5][6]. Zinc phosphate glasses also tend to have greater coefficients of thermal expansion with low processing temperatures, which makes them useful as sealing glasses [7,8].…”

“…Goel et al [25] introduced the additive ZnO into the structure of glasses composed of 36.07CaO-(19.24-x)MgO-xZnO-5.61P 2 O 5 -38.49SiO 2 -0.59CaF 2 , where x B 10 mol%, produced in the traditional melting process, and Aina et al [26], employing the same method for the synthesis, obtained fully amorphous glass containing 20.2 mass% ZnO and 37.3 % SiO 2 , 18.8 % Na 2 O, 18.9 % CaO, 4.5 % P 2 O 5 (mass%). In the literature, there are also references on the ability to form silicate-phosphate glasses that contain ZnO and are precursors of glass-crystalline materials to which P 2 O 5 was added as a nucleating agent.…”

Characterization and structural studies of lithium doped lead zinc phosphate glass system

“…Further, phosphate glasses have their unique characteristics that include; low melting point, high thermal stability, high gain density, low refractive index and low dispersive power [1][2][3][4][5][6][7]. Phosphate glasses formed with heavy metal oxides such as lead, zinc and bismuth have varieties of applications [8].…”

“…Long-range information about how the Q 3 tetrahedra are linked can also be obtained from diffraction studies [22]. These tetrahedra are linked to form a three-dimensional network being similar to the structure of P 4 those of the H-and O-forms of crystalline P 2 O 5 indicating that the glass under study likely contains long-range structural similarities to both forms. The addition of a modifying oxide to v-P 2 O 5 results in the creation of non-bridging oxygens at the expense of bridging oxygens.…”