Kinetics of Oxygen Diffusion into Multilayer Ceramic Capacitors during the Re-Oxidation Process and its Implications on Dielectric Properties

Randall, Clive A.; Mizuno, Youichi; Kaneda, Kazumi; Donnelly, Niall J.; Lee, Soonil; Qu, Wei Guo

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Paper Titles

Molten Salt Synthesis of the Barium Strontium Titanate Ba_1-XSr_XTiO₃ with KOH-KNO₃, p.27
Relaxor Characteristics of BaTiO₃-Bi(Mg_1/2Ti_1/2)O₃ Ceramics, p.31
Preparation and Dielectric Properties of Dense Barium Titanate Nanoparticle Accumulations by Electrophoresis Deposition Method, p.35
Preparation of Potassium Niobate–Barium Titanate Ceramics Using Well-Dispersed Nanoparticles and their Dielectric Properties, p.39
Kinetics of Oxygen Diffusion into Multilayer Ceramic Capacitors during the Re-Oxidation Process and its Implications on Dielectric Properties, p.43
The Kelvin Probe Force Microscopy Measurement of Degraded Multilayer Ceramic Capacitors with Ni Inner Electrode, p.47
High-Temperature Depolarization of Alkali Niobate Lead-Free Piezoceramics, p.53
Piezoelectric Properties of (Li, Na, K)NbO₃ Ceramics with Monoclinic System, p.57
Piezoelectric Properties of Porous Potassium Niobate System Ceramics, p.61

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Paper Title:

Kinetics of Oxygen Diffusion into Multilayer Ceramic Capacitors during the Re-Oxidation Process and its Implications on Dielectric Properties

Periodical	Key Engineering Materials (Volume 485)
Main Theme	Electroceramics in Japan XIV
Edited by	Chazono Hirokazu, Fujihara Shinobu, Katayama Keiichi, Masumoto Hiroshi, Mizoguchi Teruyasu, Osada Minoru, Shinozaki Kazuo and Takeda Hiroaki
Pages	43-46
DOI	10.4028/www.scientific.net/KEM.485.43
Citation	Kazumi Kaneda et al., 2011, Key Engineering Materials, 485, 43
Online since	July, 2011
Authors	Kazumi Kaneda, Youichi Mizuno, Niall J. Donnelly, Soonil Lee, Wei Guo Qu, Clive A. Randall
Keywords	Diffusion Coefficient, Impedance Spectroscopy, Kinetic, Ni-MLCC, Re-Oxidation
Price	US$ 28,-

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Abstract

Re-oxidation is an important thermal process to minimize oxygen vacancies and produce high reliable Ni-MLCCs. The re-oxidation of these devices is then investigated with a series of “in-situ” impedance measurements between 400 and 500 °C in air. From the relative impedance change, chemical diffusion coefficients, associated activation energy and effective equivalent circuit model are determined. Those values were found to be reasonable compared with previous researchers’ data. Moreover, the proposed effective equivalent circuit model successfully represents the real Ni-MLCC morphology. From transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS), it is found that the electrical properties and reliabilities of the Ni-MLCCs re-oxidized under different conditions are identical.