Page 55 - Chalcogenide Glasses for Infrared Optics

Chalcogenide Glasses 33

Atom %
Sample Softening
Number Si P Te Point (°C) Remarks
3 20 20 60 190 Stable glass
12 25 25 50 Crystalline
15 40 20 40 Crystalline
16 30 20 50 Unstable glass
19 15 20 65 150 Stable glass, poor IR transmission
20 15 25 60 200 Stable glass, ~10% IR
transmission
21 20 25 55 185 Stable glass, ~10% IR
transmission
22 25 20 55 325 Stable glass, poor IR
transmission
23 30 25 45 Unstable glass
24 35 20 45 385 Unstable glass
25 35 15 50 Unstable glass
26 30 15 55 Unstable glass
27 25 15 60 Unstable glass
28 20 15 65 250 Stable glass
29 15 15 70 180 Very stable glass, 10% IR
transmission
30 10 20 70 Reacted violently with the
atmosphere
31 10 25 65 Reacted violently with the
atmosphere
32 10 30 60 Reacted violently with the
atmosphere
33 15 30 55 Reacted violently with the
atmosphere
34 35 25 40 Crystalline, unstable
35 40 15 45 Crystalline, unstable
36 40 10 50 Crystalline, unstable
37 35 10 55 Crystalline, unstable
38 30 10 60 400 Unstable glass

TABLE 2.1 Composition of Samples Used in the Evaluation of the Si-P-Te System 14
(Continued)