A microprobe study of interdiffusion in the BaF2-SrF2 system was carried out, at temperatures of between 1033 and 1238C, using single crystals. The interdiffusion coefficient generally decreased with increasing SrF2 concentration, but the compositional dependence decreased with decreasing temperature (table 179).

R.W.Scheidecker, M.F.Berard: Journal of the American Ceramic Society, 1976, 59[9-10], 431-3

 

 

Table 179

Arrhenius Parameters for Interdiffusion

in the BaF2-SrF2 System at 1033 to 1238C

 

SrF2 (mol%)

Do (cm2/s)

Q (kcal/mol)

10

2.87 x 103

85.4

20

2.52 x 104

91.8

30

4.95 x 104

94.0

40

1.05 x 104

90.4

50

1.79 x 103

86.1

60

3.98 x 102

82.5

70

1.65 x 102

80.6

80

1.14 x 102

80.2

90

2.12 x 102

82.9