Tellurite And Fluorotellurite Glasses For Active And Passive
Tellurite And Fluorotellurite Glasses For Active And Passive Tellurite And Fluorotellurite Glasses For Active And Passive
7. Surface properties; MDO 301 20 µm (a) 2 min. (b) 5 min. (c) 10 min. (c) 30 min. Fig. (7.32): Optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) after etching in 40% HF at 21°C (all micrographs the same scale).
7. Surface properties; MDO 302 Wt. loss / % 16 14 12 10 8 6 4 2 y=0.50907x R 2 = 0.91891 0 0 5 10 15 20 25 30 Time / min. Fig. (7.33): Etch rate of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) in 4% HF at 21°C. Absorption coefficient / cm -1 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 Unetched 4% HF (2 min.) 4% HF (10 min.) Wavelength / µm 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2000 0.00 0 1500 2000 2500 3000 3500 4000 Wavenumber / cm -1 Fig. (7.34): Infrared spectra of the unetched glass, and glasses immersed in 4% HF at 21°C for 2 and 10 min of composition MOF001 (65TeO2-10Na2O-25ZnF2 mol. %). 1750 1500 1250 1000 750 500 250 Loss / dB.m -1
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7. Surface properties; MDO 301<br />
20 µm<br />
(a) 2 min. (b) 5 min.<br />
(c) 10 min. (c) 30 min.<br />
Fig. (7.32): Optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %)<br />
after etching in 40% HF at 21°C (all micrographs the same scale).
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