Kinetic process of re-oxidation of base metal technology mBaTiO{sub 3}-based multilayer capacitors.

Journal Article · Sat Nov 01 04:00:00 EST 2003 · J. Am. Ceram. Soc.

DOI:https://doi.org/10.1111/j.1151-2916.2003.tb03576.x· OSTI ID:961205

Opitz, M R; Albertsen, K; Beeson, J; Hennings, D F; Routbort, J; Randall, C

Base metal technology, mainly using Ni electrodes in multilayer ceramic capacitors (MLCCs), is now well established. This technology requires a so-called reoxidation treatment after sintering the MLCCs in a reducing atmosphere to guarantee a sufficient electrical reliability. Large numbers of electrodes, and production of physically larger components for high-voltage components, are two technological trends that make the control of the reoxidation process rather difficult. The reoxidation process has been studied to determine oxygen diffusion pathways into commercial MLCCs, using {sup 18}O tracer diffusion and finite element calculations. In MLCCs oxygen diffusion mainly occurs along the Ni electrodes. Furthermore, the reoxidation process is mostly controlled by the thermodynamic potential of the Ni/NiO equilibrium in the interior of the capacitor, but it is the short circuit diffusion along the interface of the electrode that controls the kinetics of the oxygen transport into the interior of the capacitor device.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961205
• Report Number(s): ANL/ET/JA-45421
• Journal Information: J. Am. Ceram. Soc., Journal Name: J. Am. Ceram. Soc. Journal Issue: 11 ; Nov. 2003 Vol. 86; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CAPACITORS
CERAMICS
CONTROL
DIFFUSION
ELECTRICAL FAULTS
ELECTRODES
EQUILIBRIUM
FINITE ELEMENT METHOD
INTERFACES
KINETICS
METALS
OXYGEN
POTENTIALS
PRODUCTION
RELIABILITY
SINTERING
THERMODYNAMICS
TITANATES