Tellurite And Fluorotellurite Glasses For Active And Passive

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7. Surface properties; MDO 287 Fig. (7.21) shows the O1s peak of the polished surface (i.e. un-cleaved) of glass MOF001_v (65TeO2-10Na2O-25ZnF2 mol. %), which was melted for 2 hours with fluorinated ZnF2. Fig. (7.21): High resolution XPS spectrum of O1s peak from polished surface of glass MOF001_v (65TeO2-10Na2O-25ZnF2 mol. %), with deconvoluted components due to: bridging and non-bridging oxygens (O1s), OH (O1s), M=O species (O1s) and organic (O1s). This kind of doublet structure to the O1s peak was seen for all fluorotellurite glass surfaces which were polished; therefore this O1s structure would seem to be indicative of fluorotellurite glass surface chemistry. No other peaks were asymmetric for the polished
7. Surface properties; MDO 288 sample (with a residual standard deviation between the XPS data and Gaussian / Lorentz fit typically < 1.61). Table (7.8) summarises the quantitative analysis from the high resolution scans, and for comparison, the actual atomic % batched and theoretical peak positions from the NIST XPS database. Table (7.8): Quantitative analysis from high resolution XPS scans of polished glass MOF001_v (65TeO2-10Na2O-25ZnF2 mol. %), and theoretical peak positions and atomic % batched. XPS peak Theoretical High resolution XPS scan Peak / eV At. % Peak / eV At. % Wt. % Te 3d5/2 576.2 21.67 576.3 16.29 57.35 O 1s 530.4 46.67 532.3 71.48 31.55 Na 1s 1072.5 6.67 1071.7 2.90 1.84 Zn 2p3/2 1022.5 8.33 1022.0 3.41 6.15 F 1s 684.8 16.67 684.6 5.92 3.11 It can be seen by comparing table (7.8) with table (7.7) that the surface composition of the glass was significantly different to the bulk (which can be approximately represented by the cleaved sample analysis in table (7.7)). The oxygen level at the surface was around 25 at. % more than the as-batched composition (71 and 47 at. % respectively), and the fluorine level around 11 at. % less (6 and 17 at. % respectively), which corresponds to around 67 % less fluorine than in the bulk glass. Fig. (7.22) summarises the atomic % composition of the batched (i.e. theoretical), cleaved, and polished glass surface, of composition MOF001_v (65TeO2-10Na2O- 25ZnF2 mol. %), which was melted for 2 hours with fluorinated ZnF2.
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TELLURITE AND FLUOROTELLURITE GLASS
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Abstract Glasses systems based on T
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Contents; MDO i Contents Contents i
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Contents; MDO iii 6.1.2.1. Method a
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Glossary; MDO Glossary aM = partial
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Glossary; MDO λ = wavelength λn =
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Glossary; MDO Ψ = complex dielectr
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1. Introduction; MDO 2 communicatio
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1. Introduction; MDO 4 Infrared tra
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1. Introduction; MDO 6 1.4. Thesis
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1. Introduction; MDO 8 [14] J. E. S
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2. Literature review; MDO 10 one of
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2. Literature review; MDO 12 superc
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2. Literature review; MDO 14 2.2.2.
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2. Literature review; MDO 16 phenom
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2. Literature review; MDO 18 tenden
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2. Literature review; MDO 20 crysta
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2. Literature review; MDO 22 the Za
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2. Literature review; MDO 26 Champa
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2. Literature review; MDO 28 the ad
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2. Literature review; MDO 30 (a) (b
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2. Literature review; MDO 32 showed
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2. Literature review; MDO 34 absorp
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2. Literature review; MDO 36 sharp
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2. Literature review; MDO 38 near f
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2. Literature review; MDO 40 where
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2. Literature review; MDO 42 Transm
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2. Literature review; MDO 44 origin
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2. Literature review; MDO 46 4 α =
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2. Literature review; MDO 48 Bragli
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2. Literature review; MDO 50 It can
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2. Literature review; MDO 52 and su
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2. Literature review; MDO 54 be bro
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2. Literature review; MDO 58 Table
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2. Literature review; MDO 62 [20] J
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2. Literature review; MDO 64 [47] S
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3. Glass batching and melting; MDO
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4. Thermal properties and glass sta
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5. Crystallisation studies; MDO 134
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6. Optical properties; MDO 166 75-5
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6. Optical properties; MDO 168 Fig.
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6. Optical properties; MDO 170 In r
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6. Optical properties; MDO 172 wher
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6. Optical properties; MDO 176 Abso
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6. Optical properties; MDO 178 ener
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6. Optical properties; MDO 180 6.1.
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6. Optical properties; MDO 182 ( n
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6. Optical properties; MDO 186 %),
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6. Optical properties; MDO 188 Tabl
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Percentage (%) 80 70 60 50 40 30 20
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6. Optical properties; MDO 204 Loss
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6. Optical properties; MDO 208 Tabl
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6. Optical properties; MDO 214 Loss
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Refractive index, n , at 632.8 nm 6
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6. Optical properties; MDO 228 tell
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6. Optical properties; MDO 230 mole
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6. Optical properties; MDO 232 occu
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6. Optical properties; MDO 234 The
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8. Fibre drawing; MDO 338 (a) (b) F
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8. Fibre drawing; MDO 340 Log10(η)
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8. Fibre drawing; MDO 342 sectioned
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8. Fibre drawing; MDO 344 Fig. (8.9
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8. Fibre drawing; MDO 350 Crystals
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8. Fibre drawing; MDO 352 8.2.4. Op
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8. Fibre drawing; MDO 354 Table (8.
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8. Fibre drawing; MDO 356 confirmed
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8. Fibre drawing; MDO 358 Log10(η)
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8. Fibre drawing; MDO 360 It can be
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8. Fibre drawing; MDO 362 undercool
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8. Fibre drawing; MDO 364 1. 2. 3.
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8. Fibre drawing; MDO 366 cross-sha
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8. Fibre drawing; MDO 368 A small n
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8. Fibre drawing; MDO 370 particles
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8. Fibre drawing; MDO 372 8.5. Refe
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8. Fibre drawing; MDO 374 [25] D. M
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9. Conclusions; MDO 376 optical bas
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9. Conclusions; MDO 378 • The as-
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9. Conclusions; MDO 380 9.3. Optica
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9. Conclusions; MDO 382 • For fib
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9. Conclusions; MDO 384 edge across
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9. Conclusions; MDO 386 • For gla
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9. Conclusions; MDO 388 • The Ag
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9. Conclusions; MDO 390 • Increas
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9. Conclusions; MDO 392 [5] I. Shal
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10. Future work; MDO 394 Fig. (10.1
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Temperature / o C 10. Future work;
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Tellurite And Fluorotellurite Glasses For Active And Passive

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