Diffusion of silver was studied in a ceramic based on lead zirconate t
itanate, Pb0.95Sr0.05(Zr0.53Ti0.47)03 + 1 Wt%. Nb2O5 (PZT), by means o
f a radio-tracer method. Parameters of silver diffusion and silver con
tent in PZT after continuous diffusion saturation of the ceramic by th
is impurity were determined in the temperature range 500-850-degrees-C
. Concentration-depth profiles and silver content in the ceramic were
obtained as a result of metal diffusion from the electrode during cera
mic silvering. Our results show that silver has a high diffusivity. No
evaporation of silver during metallization (T(max) = 750-degrees-C) w
as found, but part of it (approximately 0.1 mg cm-2) penetrates into t
he ceramic from the electrode to a depth of more than 1000 mum, and th
e silver concentration varies from approximately 2 x 10(19) to approxi
mately 2 x 10(18) at cm-3. The silver concentration does not exceed 0.
2 at% at diffusion saturation of the ceramic during 100-120 h over the
temperature range 650-850-degrees-C.