Page 85 - Chalcogenide Glasses for Infrared Optics

Chalcogenide Glasses 63

Altogether there were 30 attempts. The composition of Ti V Te was
15 15 70
chosen as the most likely to succeed.
Figure 2.24 shows photographs of the results with that composi-
tion heated to 1300 to 1600°C. Notice that only at 1600°C were there
signs that a melt had formed at the bottom of the vial. Obviously a
higher temperature would be required. Raising the temperature to
1700°C and holding it longer produced homogeneous melts that

(a)

(b)

(c)

FIGURE 2.24 Photographs of the results from attempts to form glass from
the composition Ti V Te . (a) Reactor temperature 1300°C, (b) reactor
15 15 70
temperature 1500°C, and (c) reactor temperature 1600°C.