Measurements were made of the diffusion of radioactive 110mAg in monocrystalline PbMgNbO3 - PbTiO3 piezoelectric ceramics of the perovskite family. It was found that diffusion in PbMgNbO3 - PbTiO3 was characterized by the expression:

D (m2/s) = 3.4 x 10-3 exp[-277(kJ/mol)/RT]

These results were comparable to those for cation diffusion in high-temperature superconducting Cu3Ba2YO7.

Diffusion of 110mAg Tracer in Polycrystalline and Single-Crystal Lead-Containing Piezoelectric Ceramics. D.J.Lewis, D.Gupta, M.R.Notis, Y.Imanaka: Journal of the American Ceramic Society, 2001, 84[8], 1777-84