An investigation was made of the diffusion of Ti ions, in melts which contained 20%K2TiF6 and 0.5%TiO2, by using chronopotentiometric measurements of potential changes, as a function of time, when a constant current was passed through the melt. The diffusivity at 850C was 3.4 x 10-6cm2/s.

Chronopotentiometric Determination of Diffusion Coefficients of Titanium Ions in Chloride-Fluoride Melts. Y.K.Delimarskii, P.A.Pogrebnoi: Ukrainski Khimicheski Zhurnal, 1967, 33[12], 1308-9

 

Table 144

Diffusion of Cl- in Doped and Undoped PbCl2

 

ThCl4 (%)

Temperature (C)

D (cm2/s)

0

200

2.42 x 10-10

0

220

4.21 x 10-10

0

240

6.95 x 10-10

0

260

1.11 x 10-9

0

280

1.72 x 10-9

0

300

2.60 x 10-9

4

200

3.32 x 10-11

4

220

4.30 x 10-11

4

240

7.69 x 10-11

4

260

1.33 x 10-10

4

280

2.21 x 10-10

4

300

3.55 x 10-10

 

Table 145

Diffusion of Pb2+ in Doped and Undoped PbCl2

 

ThCl4 (%)

Temperature (C)

D (cm2/s)

0

200

5.80 x 10-15

0

220

9.22 x 10-15

0

240

3.20 x 10-14

0

260

8.89 x 10-14

0

280

2.05 x 10-13

0

300

4.84 x 10-13

4

200

6.53 x 10-13

4

220

1.60 x 10-12

4

240

3.80 x 10-12

4

260

7.44 x 10-12

4

280

1.24 x 10-11

4

300

2.16 x 10-11