Page 86 - Chalcogenide Glasses for Infrared Optics

64 Cha pte r T w o

cooled to crystalline solids. Photographs of the results are shown in
Fig. 2.25. The solid was different in composition because Te vapor
condensed on the walls of the vial. The true composition could be
calculated by weighing the lost Te. For three runs the final composi-
tions were calculated to be Ti V Te , Ti V Te , and Ti V Te .
30 30 40 23 23 54 11 11 78

(a)

(b)

(c)
FIGURE 2.25 Ti V Te . (a) Sample no. 95 reactor temperature 1700°C,
5 15 70
(b) sample no. 96 reactor temperature 1600°C for 2 h, and (c) sample no. 97
reactor temperature 1600°C for 1 h.