Title :
Grain boundary and lattice diffusion of Mn in ATiO3 (A=Ba, Sr)
Author :
de Vries, J.W.C. ; Waser, R.M.
Author_Institution :
Philips Components, Eindhoven, Netherlands
Abstract :
The diffusion constant of Mn in polycrystalline BaTiO3 and SrTiO3 was determined between 1000°C and 1200°C. Its value was found to be more than four orders of magnitude larger than one would expect for volume diffusion of Mn. This result was in accordance with the presence of Mn in the grain-boundary phases. Effective activation energies of 5.9-6.8 eV are estimated
Keywords :
barium compounds; diffusion in solids; ferroelectric materials; grain boundary diffusion; high-temperature phenomena and effects; manganese; strontium compounds; 1000 to 1200 degC; BaTiO3:Mn; SrTiO3:Mn; activation energies; diffusion constant; ferroelectric; grain-boundary phases; lattice diffusion; polycrystalline; volume diffusion; Ceramics; Conducting materials; Conductivity; Dispersion; Grain size; Lattices; Reservoirs; Strontium; Temperature dependence; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on
Conference_Location :
Urbana-Champaign, IL
Print_ISBN :
0-7803-0190-0
DOI :
10.1109/ISAF.1990.200313
