Diffusional penetration of silver from electrodes into PZT ceramics |
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Authors: | M V Slinkina G I Dontsov V M Zhukovsky |
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Affiliation: | (1) Physico-Technical Department, Urals Polytechnical Institute, 620 002 Ekaterinburg, Russia;(2) Chemistry Department, Urals State University, Lenin Ave. 51, 620 083 Ekaterinburg, Russia |
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Abstract: | Diffusion of silver was studied in a ceramic based on lead zirconate-titanate, Pb0.95Sr0.05(Zr0.53Ti0.47)O3+1 wt%. Nb2O5 (PZT), by means of a radio-tracer method. Parameters of silver diffusion and silver content in PZT after continuous diffusion saturation of the ceramic by this impurity were determined in the temperature range 500–850 °C. Concentration-depth profiles and silver content in the ceramic were obtained as a result of metal diffusion from the electrode during ceramic silvering. Our results show that silver has a high diffusivity. No evaporation of silver during metallization (T
max=750 °C) was found, but part of it ( 0.1 mg cm–2) penetrates into the ceramic from the electrode to a depth of more than 1000 m, and the silver concentration varies from 2×1019 to 2×1018 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 °C. |
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