Tellurite And Fluorotellurite Glasses For Active And Passive

3. Glass batching and melting; MDO 77
Table (3.6): Melting details for fluoride containing tellurite glasses melted in this
study.
Stage 1 5 Stage 2 6 Stage 3 7
MOF
ID
Temp. Time /
/ °C hr.
Temp. Time
/ °C / hr.
Temp. Time /
/ °C hr.
Weight
/ g
Mould 8
Wt. %
Volatil
-isation
Crystallisation
001i 700 1.00 - - 250 1.00 10 SA - N
001ii 750 1.00 - - 230 1.00 10 SA - N
001iii 750 1.00 600 0.75 225 1.00 10 SA 5.84 N
001iv 750 1.00 650 0.75 230 1.00 10 SA 6.19 N
001v 800 9 1.00 670 1.00 230 1.00 10 SA - N
001vi 800 1.00 670 1.00 230 1.00 30 CB - N
002 750 1.00 - - 250 1.00 10 SA - N
003 750 1.00 650 0.75 225 1.00 10 SA 1.77 N
004i 750 1.00 650 0.75 232 1.00 10 SA 10.06 N
004ii 800 1.00 670 1.00 230 1.00 30 CB 2.99 N
004iii 800 1.50 670 1.50 230 1.00 30 CB 3.05 N
004iv 800 1.50 670 1.50 230 1.00 30 CB 2.96 N
005i 750 1.00 650 0.75 234 1.00 10 SA 4.34 N
005ii 800 1.00 670 1.00 230 1.00 30 CB 2.03 N
005iii 800 1.00 670 1.00 230 1.00 30 CB 2.02 N
005iv 800 1.50 670 1.50 230 1.00 30 CB 2.44 N
005v 800 2.00 670 2.00 230 1.00 30 CB 2.83 N
005vi 800 9 2.50 670 2.50 230 1.00 30 CB 1.90 N
005vii 800 9 5.00 670 5.00 230 1.00 30 CB 5.53 N
005viii 800 9 6.00 670 6.00 230 1.00 30 CB 6.27 N
005ix 10 800 9 12 - - 230 1.00 30 CA - N
005x 10 800 9 12 - - 230 1.00 30 CA - N
006 750 1.00 650 0.75 230 1.00 10 SA 3.53 N
007 750 1.00 650 0.75 230 1.00 10 SA 2.32 N 11
008 800 1.00 650 0.75 240 1.00 10 SA 0.68 N 10
009 800 1.00 670 1.00 235 1.00 10 SA 4.50 N
010 800 1.00 670 1.00 235 1.00 10 SA 4.03 N
011 800 1.00 670 1.00 240 1.00 10 SA 0.33 N
012 800 1.00 670 1.00 240 1.00 10 SA 1.78 N
013 800 1.00 670 1.00 240 1.00 10 SA 0.33 N
014 850 1.00 700 1.00 250 1.00 10 SA 14.97 N
015 800 9 2.00 670 2.00 230 1.00 10 LB - Y
016 800 9 2.50 670 2.50 230 1.00 15 LB - Y
017i 800 9 2.50 670 2.50 230 1.00 15 LB - Y
017ii 800 9 2.50 670 2.50 230 1.00 10 SA 7.61 N
018i 800 9 1.50 670 1.50 230 1.00 6 SA - N
018ii 800 9 2.50 670 2.50 230 1.00 10 SA 7.90 N
5 Stage 1 was the first stage of melting
6 Stage 2 was the second stage of melting
7 Stage 3 was the annealing stage
8 LB = large brass, SA = small aluminium, CB = cylindrical brass
9 Used fluorinated ZnF2
10 Melted in glovebox, with 2:1 ration of dry N2:O2
11 Partial