Antimony and silicon environments in antimony silicate glasses

Mee, Martin; Davies, Bob; Orman, R. G.; Thomas, Michael F.; Holland, Diane

doi:10.1016/j.jssc.2010.06.014

Cited by 22 publications

(11 citation statements)

References 19 publications

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“…Another band, at 600 cm −1 region, was related to asymmetric vibrations of the Sb-O-Sb bond structure. Furthermore, the absorption band whose maximum corresponded to wavenumber equal 1037 cm −1 was typical of the Si-O-Si bond vibrations [16], whereas the band at 927 cm −1 stemmed from oxygen bridge vibrations. Finally, maximum phonon energy at 1186 cm −1 in the discussed glass was a consequence of symmetric SiO 4 groups vibrations [17], and a very weak band at 773 cm −1 was an effect of doubly degenerate vibrations of Sb-O bands.…”

Section: Active Glasses As the Luminescent Sources Of Radiation For Smentioning

confidence: 95%

Active glasses as the luminescent sources of radiation for sensor applications

Żmojda¹,

Dorosz²,

Kochanowicz³

et al. 2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The article presents physicochemical, thermal and spectroscopic properties of two different glass systems: TeO2-GeO2-PbO-PbF2-BaO-Nb2O5-LaF3 and SiO2-Al2O3-Sb2O3, co-doped with Yb 3+ /Tm 3+ ions. Blue upconversion luminescence at a wavelength of 478 nm corresponding to the thulium 1 G4 → 3 H6 transition was observed under 976 nm pump radiation in both of the co-doped glasses. This indicated the existence of efficient Yb 3+ →Tm 3+ energy transfer via three-photon absorption mechanism. Thermal and optical results substantiate the claim for practical applicability of the manufactured glasses in design of optical fiber sources.

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Section: Active Glasses As the Luminescent Sources Of Radiation For Smentioning

confidence: 95%

Active glasses as the luminescent sources of radiation for sensor applications

Żmojda¹,

Dorosz²,

Kochanowicz³

et al. 2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Antimony oxide participates in the glass network with trigonal pyramidal [:SbO 3 ] structural units sharing corners which can be viewed as tetrahedrons with the oxygen at three corners and a lone pair of electrons at the fourth corner [8,9]. Such structural unit can be also considered as pseudo-tetrahedral unit with one vertex occupied by the lone pair of electrons [8].…”

Section: Introductionmentioning

confidence: 99%

“…Such structural unit can be also considered as pseudo-tetrahedral unit with one vertex occupied by the lone pair of electrons [8]. Antimony ions exist not only in the Sb 3+ state but also in the Sb 5+ oxidation state.…”

Section: Introductionmentioning

confidence: 99%

“…Antimony ions exist not only in the Sb 3+ state but also in the Sb 5+ oxidation state. In the Sb 5+ state, ions participate in the glass network as octahedral [SbO 6 ] units [8] or as singly positive [Sb 5+ O 4 ] + , 4-coordinated structural units [10,11]. The MoO 3 → Sb 2 O 3 substitution brings an excess of anionic oxygen which increases the number of non-bridging oxygen [9,12].…”

Section: Introductionmentioning

confidence: 99%

“…Last years an intensive attention was given to antimonite glasses because of their similar physical properties to widely used tellurite glasses without specific problems related to tellurium toxicity [1][2][3][4][5][6][7][8][9][10][16][17][18]. They have a broad thermal stability range and so they are also suitable for fiber drawing [3].…”

Section: Introductionmentioning

confidence: 99%

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Electrical, dielectric, and optical properties of Sb 2 O 3 –Li 2 O–MoO 3 glasses

Kubliha

Soltani

Trnovcová

et al. 2015

Journal of Non-Crystalline Solids

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Temperature and frequency dependencies of DC and AC conductivities, dielectric response, static permittivity, optical absorption edge, infrared absorption spectrum, density, and temperatures of glass transition and crystallization for lithium molybdenum-antimonite glasses, (80 − x)Sb 2 O 3 -20Li 2 O-xMoO 3 , where x = 0-40, are measured and discussed. The DC conductivity increases with increasing concentration of MoO 3 . At 150°C, it ranges from 5 × 10 −11 S/m up to 3 × 10 −8 S/m. Polaron hopping between Mo 5+ and Mo 6+ ions contributes, probably, to the DC conductivity. Ionic conductivity by Li + ions is also present. The conduction activation energy monotonously decreases from 1.15 eV, at x = 5, down to 0.91 eV, at x = 40. In all glasses with x N 0, the conduction activation energy is close to a half of the indirect allowed optical gap. The pre-exponential factor, σ 0 , goes through a sharp maximum close to the composition (x = 20) with both the highest glass transition temperature and the largest thermal stability range. The frequency dependence of the AC conductivity is composed of three components -the DC conductivity and two AC components. For x = 35 and 40, the activation energy of electrical relaxation is equal to 0.954 ± 0.008 eV and the pre-exponential factor of relaxation times is equal to (4 ± 1) 10 −14 s. The static relative permittivity ranges from 17.4 to 23.0. Strong extrinsic absorption bands in infrared region originate from hydroxyl ions, CO 2 impurities, and silicon-oxygen vibrations. The UV-visible indirect allowed absorption edge shifts from 2.6 eV to 2.1 eV with increasing MoO 3 content. With increasing MoO 3 content the glasses darken, from a light yellow color, at x = 0, to a deep brown color, at x = 40.

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