Glass Sample

The various compositions of glass (mol%)

[O/P]

(Dr) (g/cm2/mn)

Log(Dr)

P2O5

Na2O

CaO

Al2O3

---------------

20 days

--------------

S050

50

10

40

0

3

3.82 × 10−7

−6.42

S550

50

10

35

5

3.1

6. 60 × 10−7

−6.18

S7.550

50

10

32.5

7.5

3.15

1.25 × 10−6

−5.90

S1050

50

10

30

10

3.2

1.07 × 10−5

−4.97