Characterization of silver interdiffusion into (Zn,Mg)TiO3+x:Bi:Sb multilayer ceramic capacitor

Wen-Shi Lee, Chi Yi Su

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 multilayer ceramic capacitors (MLCCs) with different proportions of a silver (Ag)-palladium (Pd) mixture acting as the inner electrode were sintered at 925°C for 2 h to evaluate the effect of the inner electrode on reliability. The main results reveal that the lifetime is inversely proportional to the Ag content in the Ag/Pd inner electrode. Ag diffusion into the (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC during cofiring at 925°C for 2 h and Ag migration at 140°C against 200 V are both responsible for the short lifetime of the (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC, particularly the latter factor. A Bi,Sb-rich secondary phase was present at the triple junction and a small amount of Ag was detected from the second phase for a (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC with a high Ag content in the inner electrode of Ag/Pd=99/01. However, this was not the case with a low Ag content in the inner electrode of Ag/Pd=90/10. This means that the Bi,Sb-rich second phase plays an important role in determining the degradation of insulation resistance due to the excessive formation of oxygen vacancies from the reaction of Ag+ for Bi3+ or Sb5+ substitution to lower the activation energy of the (Zn,Mg)TiO3+Bi2O3+Sb2O5 dielectrics and to enhance markedly the effect of Ag migration.

Original languageEnglish
Pages (from-to)2454-2460
Number of pages7
JournalJournal of the American Ceramic Society
Volume90
Issue number8
DOIs
Publication statusPublished - 2007 Aug 1

Fingerprint

Ceramic capacitors
Silver
ceramics
palladium
Palladium
silver
Multilayers
electrode
Electrodes
triple junction
Oxygen vacancies
insulation
activation energy
Insulation
substitution
Substitution reactions
Activation energy
Degradation
oxygen
degradation

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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title = "Characterization of silver interdiffusion into (Zn,Mg)TiO3+x:Bi:Sb multilayer ceramic capacitor",
abstract = "In this study, (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 multilayer ceramic capacitors (MLCCs) with different proportions of a silver (Ag)-palladium (Pd) mixture acting as the inner electrode were sintered at 925°C for 2 h to evaluate the effect of the inner electrode on reliability. The main results reveal that the lifetime is inversely proportional to the Ag content in the Ag/Pd inner electrode. Ag diffusion into the (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC during cofiring at 925°C for 2 h and Ag migration at 140°C against 200 V are both responsible for the short lifetime of the (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC, particularly the latter factor. A Bi,Sb-rich secondary phase was present at the triple junction and a small amount of Ag was detected from the second phase for a (Zn,Mg)TiO3+x+Bi2O3+Sb2O5 MLCC with a high Ag content in the inner electrode of Ag/Pd=99/01. However, this was not the case with a low Ag content in the inner electrode of Ag/Pd=90/10. This means that the Bi,Sb-rich second phase plays an important role in determining the degradation of insulation resistance due to the excessive formation of oxygen vacancies from the reaction of Ag+ for Bi3+ or Sb5+ substitution to lower the activation energy of the (Zn,Mg)TiO3+Bi2O3+Sb2O5 dielectrics and to enhance markedly the effect of Ag migration.",
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Characterization of silver interdiffusion into (Zn,Mg)TiO3+x:Bi:Sb multilayer ceramic capacitor. / Lee, Wen-Shi; Su, Chi Yi.

In: Journal of the American Ceramic Society, Vol. 90, No. 8, 01.08.2007, p. 2454-2460.

Research output: Contribution to journalArticle

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AU - Su, Chi Yi

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