How Trivalent Amphoteric Dopants in BaTiO3 Ceramics Improve Reliability of Capacitors´╗┐?,

Abstract. A new hypothesis regarding the role of rare earth dopants in improving the lifetime of

multilayer capacitors with base metal electrodes is presented. The hypothesis is based on the

experimental findings, which have shown that the site occupancy of the important dopants is a

function of the overall A/B ratio in the perovskite dielectric material. The main assumption is

that deviation from A/B stoichiometry significantly controls the mobility of oxygen vacancies

along the grain boundaries.

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