Properties of chlorofluorozirconate glasses

Properties of chlorofluorozirconate glasses

The effect on selected optical and physical properties of a fluoride glass doped with chloride was investigated. Four compositions were studied: 50%ZrF 4-30%BaF 2-5%ThF 4-3%LaF 3-12%Ab where A = NaCl, NaF, RbCl or RbF. The chlorine addition decreased the multiphonon absorption and its magnitude was...

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Veröffentlicht in:Journal of non-crystalline solids 1990-04, Vol.119 (2), p.187-194
Hauptverfasser: Elyamani, Abdessamad, Poulain, Marcel, Saggese, Steven J, Sigel, George H
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Sprache:eng
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Physics
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container_issue 2
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container_title Journal of non-crystalline solids
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creator Elyamani, Abdessamad
Poulain, Marcel
Saggese, Steven J
Sigel, George H
description The effect on selected optical and physical properties of a fluoride glass doped with chloride was investigated. Four compositions were studied: 50%ZrF 4-30%BaF 2-5%ThF 4-3%LaF 3-12%Ab where A = NaCl, NaF, RbCl or RbF. The chlorine addition decreased the multiphonon absorption and its magnitude was determined to be dependent upon the molar concentration of ZrF bonds. The electronic absorption showed a substantial increase into the visible region. The index of refraction was increased by approximately 1.5% due to the more polarizable chlorine ion. There was a substantial change in the thermal stability of the glasses according to differential scanning calorimetric (DSC) analysis. The RbCl composition exhibited the largest ( T x− T g) of 110°C whereas the RbF composition has the smallest value of 68°C. The chloride substitution increased the thermal expansion coefficient very slightly in the Na-containing glasses ( Δα ≈ 2 × 10 −6) and not at all in the Rb-containing glasses. However, the chloride containing glasses were found to be less chemically durable in water due to the higher solubility of chloride as compared with fluoride. These modifications in properties demonstrate the feasibility of a chlorofluoride core/fluoride clad fiber optic with high thermal stability, extended IR transparency, and large numerical aperture.
doi_str_mv 10.1016/0022-3093(90)90842-A
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However, the chloride containing glasses were found to be less chemically durable in water due to the higher solubility of chloride as compared with fluoride. 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However, the chloride containing glasses were found to be less chemically durable in water due to the higher solubility of chloride as compared with fluoride. These modifications in properties demonstrate the feasibility of a chlorofluoride core/fluoride clad fiber optic with high thermal stability, extended IR transparency, and large numerical aperture.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/0022-3093(90)90842-A</doi><tpages>8</tpages></addata></record>
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Physics
title Properties of chlorofluorozirconate glasses
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