Tellurite And Fluorotellurite Glasses For Active And Passive
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Tellurite And Fluorotellurite Glasses For Active And Passive

Tellurite And Fluorotellurite Glasses For Active And Passive Tellurite And Fluorotellurite Glasses For Active And Passive

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2. Literature review; MDO 65 [60] D. L. Sidebottom, M. A. Hruschka, B. G. Potter, and R. K. Brow, "Structure and optical properties of rare earth-doped zinc oxyhalide tellurite glasses," Journal of Non-Crystalline Solids, vol. 222, pp. 282-289, 1997. [61] V. R. Kumar and N. Veeraiah, "Dielectric properties of ZnF2-PbO-TeO2 glasses," Journal of Physics and Chemistry of Solids, vol. 59, pp. 91-97, 1998. [62] D. K. Durga, P. Yadagiri Reddy, and N. Veeraiah, "Optical absorption and thermoluminescence properties of ZnF2-MO-TeO2 (MO = As2O3, Bi2O3 and P2O5) glasses doped with chromium ions," Journal of Luminescence, vol. 99, pp. 53-60, 2002. [63] A. Hruby, "Evaluation of glass-forming tendency by means of DTA," Czechoslovak Journal of Physics Section B, vol. 22, pp. 1187, 1972.

3. Glass batching and melting; MDO 66 3. Glass batching and melting 3.1. Glass compositions used in this study A wide range of oxide and oxyfluoride tellurite glass compositions was synthesised and characterised in this study to choose suitable core / cladding compositions for fibre drawing. Table (3.1) shows the oxide compositions melted and table (3.2) shows the fluorotellurite compositions (bulk samples for characterisation and fibreoptic preforms). 3.2. Glass batching Glass properties are in general strongly dependent on composition so it is important to be able to predict final glass compositions as accurately as possible before melting. Due to volatilisation during glass melting, especially of fluoride compounds, there will have been some degree of error in the batch calculation, but with carefully controlled melting conditions these errors could be minimised. Table (3.3) shows the chemicals used to batch glasses in this study. Further purification of the batch is described later in section (3.4). Batch calculations were performed using a program developed in house by Dr. D. Furniss, called Batch. Fig. (3.1) shows the input window of this programme.

3. Glass batching and melting; MDO 66<br />

3. Glass batching and melting<br />

3.1. Glass compositions used in this study<br />

A wide range of oxide and oxyfluoride tellurite glass compositions was synthesised<br />

and characterised in this study to choose suitable core / cladding compositions for<br />

fibre drawing. Table (3.1) shows the oxide compositions melted and table (3.2) shows<br />

the fluorotellurite compositions (bulk samples for characterisation and fibreoptic<br />

preforms).<br />

3.2. Glass batching<br />

Glass properties are in general strongly dependent on composition so it is important to<br />

be able to predict final glass compositions as accurately as possible before melting.<br />

Due to volatilisation during glass melting, especially of fluoride compounds, there<br />

will have been some degree of error in the batch calculation, but with carefully<br />

controlled melting conditions these errors could be minimised. Table (3.3) shows the<br />

chemicals used to batch glasses in this study. Further purification of the batch is<br />

described later in section (3.4).<br />

Batch calculations were performed using a program developed in house by Dr. D.<br />

Furniss, called Batch. Fig. (3.1) shows the input window of this programme.

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