The diffusivity of these impurities in sintered Pb0.95Sr0.05(Ti0.47Zr0.53)-1wt%Nb2O5 was measured by using a tracer-sectioning method at temperatures of between 600 and 1000C. It was found that the impurities had very high diffusional mobilities (table 116).

M.V.Slinkina, G.I.Dontsov, V.M.Zhukovskii, R.R.Khafizov: Izvestiya Akademii Nauk SSSR - Neorganicheskie Materialy, 1990, 26[9], 1964-6. [Inorganic Materials, 1990, 26[9], 1677-9]

 

 

 

Table 116

Diffusion Parameters for Various Impurities in

Sintered Pb0.95Sr0.05(Ti0.47Zr0.53)-1wt%Nb2O5

 

Impurity

Temperature (C)

Do (cm2/s)

E (kJ/mol)

V

700 - 1000

5.1 x 10-2

120

V

600 - 700

2.2 x 107

300

Cr

700 - 1000

4.9 x 10-2

120

Cr

600 - 700

4.5 x 108

304

Zn

800 - 1000

3.6 x 10-6

40

Zn

600 - 750

1.4 x 107

300

Mn

700 - 1000

1.0 x 10-1

140

Sr

700 - 1000

2.6 x 100

170

Y

700 - 1000

2.1 x 10-1

150

Nb

800 - 1000

2.9 x 10-2

130