Tellurite And Fluorotellurite Glasses For Active And Passive

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2. Literature review; MDO 29 2.3.2.3. TeO2-Na2O Addition of Na2O, a network modifier, to TeO2 glasses results in more significant depolymerisation than ZnO, as sodium is monovalent, and will terminate network linkages wherever bonded to oxygen. Himei et al. [24] studied the structure of alkali (Li, Na, K, Rb, and Cs) tellurite glasses with X-ray photoelectron spectroscopy (XPS). The valence band spectra (0 to 30 eV) showed a change in structure from [TeO4] tbp to [TeO3] tp with alkali addition. The [TeO4] tbp has a lone pair of electrons at one of the equatorial sites of the tellurium sp 3 d hybrid orbital and [TeO3] sp 3 [24]. Zwanziger et al. [25] probed the sodium distribution in TeO2-Na2O glasses by spin- echo NMR. Maximum stability has been shown to occur at 20 mol. % Na2O. Na-Na distances in the glass were shown to be much closer than the random distribution expected around the 20 mol. % Na2O composition, and sodium was shown to reside in different sites to crystalline Na2Te4O9. This difference in structure which occurs at maximum glass stability could provide a high enough energy barrier to prevent structural rearrangement, and hence inhibit crytallisation [25]. Sakida et al. [26] studied the structure of alkali-metal tellurite (Li, Na, K, Rb, and Cs) glasses by NMR. Fig. (2.4) shows (a) the range of structural units seen in the glasses, and (b) mechanisms for M2O entering the glass network.
2. Literature review; MDO 30 (a) (b) Fig. (2.4): (a) Range of structural units seen in the glasses, and (b) mechanisms for M2O entering the glass network [26].
Page 1 and 2: TELLURITE AND FLUOROTELLURITE GLASS
Page 3 and 4: Abstract Glasses systems based on T
Page 5 and 6: Contents; MDO i Contents Contents i
Page 7 and 8: Contents; MDO iii 6.1.2.1. Method a
Page 9 and 10: Glossary; MDO Glossary aM = partial
Page 11 and 12: Glossary; MDO λ = wavelength λn =
Page 13 and 14: Glossary; MDO Ψ = complex dielectr
Page 15 and 16: 1. Introduction; MDO 2 communicatio
Page 17 and 18: 1. Introduction; MDO 4 Infrared tra
Page 19 and 20: 1. Introduction; MDO 6 1.4. Thesis
Page 21 and 22: 1. Introduction; MDO 8 [14] J. E. S
Page 23 and 24: 2. Literature review; MDO 10 one of
Page 25 and 26: 2. Literature review; MDO 12 superc
Page 27 and 28: 2. Literature review; MDO 14 2.2.2.
Page 29 and 30: 2. Literature review; MDO 16 phenom
Page 31 and 32: 2. Literature review; MDO 18 tenden
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Page 71 and 72: 2. Literature review; MDO 58 Table
Page 75 and 76: 2. Literature review; MDO 62 [20] J
Page 77 and 78: 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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6. Optical properties; MDO 236 addi
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6. Optical properties; MDO 238 an o
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6. Optical properties; MDO 240 30 m
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6. Optical properties; MDO 244 zinc
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6. Optical properties; MDO 246 [4]
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6. Optical properties; MDO 248 [32]
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7. Surface properties; MDO 250 7.1.
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7. Surface properties; MDO 252 For
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7. Surface properties; MDO 254 can
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7. Surface properties; MDO 256 wher
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7. Surface properties; MDO 258 etch
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7. Surface properties; MDO 260 Elem
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7. Surface properties; MDO 262 All
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7. Surface properties; MDO 264 beco
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7. Surface properties; MDO 266 prov
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7. Surface properties; MDO 268 cont
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7. Surface properties; MDO 270 LaB6
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7. Surface properties; MDO 272 7.2.
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7. Surface properties; MDO 274 Tabl
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7. Surface properties; MDO 276 This
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7. Surface properties; MDO 278 It c
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7. Surface properties; MDO 280 Fig.
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7. Surface properties; MDO 282 CPS
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7. Surface properties; MDO 288 samp
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7. Surface properties; MDO 290 20
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7. Surface properties; MDO 292 20
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7. Surface properties; MDO 294 Wt.
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7. Surface properties; MDO 296 It c
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7. Surface properties; MDO 300 The
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7. Surface properties; MDO 302 Wt.
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7. Surface properties; MDO 304 All
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7. Surface properties; MDO 306 The
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[Zn(OH,F)F] / mol. % 7. Surface pro
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7. Surface properties; MDO 310 bind
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7. Surface properties; MDO 312 ZnF2
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7. Surface properties; MDO 314 clea
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7. Surface properties; MDO 316 have
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7. Surface properties; MDO 320 quan
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7. Surface properties; MDO 322 ∫
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7. Surface properties; MDO 324 This
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7. Surface properties; MDO 326 Ther
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7. Surface properties; MDO 328 [2]
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8. Fibre drawing; MDO 330 8. Fibre
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8. Fibre drawing; MDO 332 The data
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8. Fibre drawing; MDO 334 Table (8.
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Preform 8. Fibre drawing; MDO 336 S
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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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