The diffusion of strontium and zirconium in single crystal BaTiO3 was investigated

in air at between 1000 and 1250C. Thin films of SrTiO3, deposited by spin coating

a precursor solution and thin films of zirconium, deposited onto the sample

surfaces by sputtering, were used as diffusion sources. The diffusion profiles were

measured by SIMS depth profiling on a time-of-flight secondary ion mass

spectrometer. The diffusion coefficients of strontium and zirconium were given by:

DSr (cm2/s) = 3.6 x 102exp[-543(kJ/mol)/RT]

DZr (cm2/s) = 1.1 x 101exp[−489(kJ/mol)/RT]

The results were explained in terms of different diffusion mechanisms in the

perovskite structure of BaTiO3.

Diffusion of Sr and Zr in BaTiO3 Single Crystals. S.Koerfer, R.A.De Souza,

H.I.Yoo, M.Martin: Solid State Sciences, 2008, 10[6], 725-34