Tellurite And Fluorotellurite Glasses For Active And Passive

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Handle for turning crucibles Motor controller 8. Fibre drawing; MDO 333 tube method, due to a potentially superior core-cladding boundary. Table (8.2) shows the parameters associated with the unstructured preforms made in this study. Cladding 1 glass 2 3 Mould Rotate at 1000 rpm for 10 sec. (a) (b) Core glass Crucible holders Fig. (8.1): (a) Schematic illustration of rotational casting process; (b) photograph of rotational casting equipment. Lid Mould holder
8. Fibre drawing; MDO 334 Table (8.2): Parameters relating to unstructured tellurite and fluorotellurite preform manufacture: preform ID, composition, melting time and temperature, crucible and mould (CB = cylindrical brass, CA = cylindrical aluminium) used, and comments on preform / fibre quality relating to melting / casting process, all made from 30 g batches, of 1 cm diameter. Preform ID MOD010_i Composition / mol. % 75TeO2-10Na2O- 10ZnO-5PbO MOF004_iv 60TeO2-10Na2O- 30ZnF2 MOF005_ii 70TeO2-10Na2O- 20ZnF2 MOF005_iii ″ MOF005_iv ″ MOF005_v ″ MOF005_vi ″ MOF005_vi i MOF005_vi ii MOF005_ix 2 ″ ″ T / °C t / hr. Crucible Mould Comments 800 2.0 Pt CB 800 670 800 670 800 670 800 670 800 670 800 1 670 800 1 670 800 1 670 1.5 1.5 1.0 1.0 1.0 1.0 1.5 1.5 2.0 2.0 2.5 2.5 5.0 5.0 6.0 6.0 ″ ″ ″ ″ ″ ″ ″ ″ Au ″ ″ ″ ″ ″ ″ ″ ″ 800 1 12.0 ″ CA MOF005_x 2 ″ 800 1 12.0 ″ ″ Contained small bubbles, and after drawing, fibre poor surface Surface frosted, poor fibre when drawn with N2 atmosphere Good glass, homogeneous, and no bubbles, however fibre drawing not steady or dimentionally consistent, producing weak fibre Good glass, resulting in strong pristine fibre Some striations, but produced good fibre and drew steadily Good glass, resulting in strong pristine fibre Discoloured surface It can be seen that the use of Au crucibles resulted in good quality fibre, however the melting atmosphere was also altered for preforms MOF005_iv to MOF005_x (see table (8.3) in the next section for further details), and also had a significant effect on the control of fibre drawing. Using an aluminium mould in a nitrogen rich glovebox atmosphere caused preform surface discolouration, most likely due to the reduction of the 1 Used fluorinated ZnF2 2 Melted in glovebox with 2:1 ratio dry N2:O2
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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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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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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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