Effect of Dy Doping on Resistance Degradation of (Ba)(Ti, Zr)O3 Sintered in Reducing Atmosphere under Highly Accelerated Life Test.

Lee, Wen-Shi; Hennings, D.; Lee, Ying Chieh

doi:10.2109/jcersj.109.1274_823

Cited by 8 publications

(10 citation statements)

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“…al. [5] recently reported Dy 2 Ti 2 O 7 phase was detected in the BaTiO 3 with Ti-excess. Buscaglia et al [6] investigated the incorporation of Er 3+ into BaTiO 3 ceramics and also observed Er 2 Ti 2 O 7 crystallites existed inside the pockets of Ti-rich phase.…”

Section: Microstructuresmentioning

confidence: 89%

“…Lee et al proposed that the addition of Dy 3+ and Nb 5+ could improve the resistance degradation of BME materials in HALT [4]. It is thought that Dy 3+ entering Ba-sites as donors can improve the stability of life due to the reduction of oxygen vacancies and the formation of a barrier of grain boundaries that suppresses electromigration of oxygen vacancies [5]. The previous studies have mainly focused on the effects of Dy 3+ on the dielectric and substitution mechanism of BaTiO 3 or Ba(ZrTi)O 3 systems [5].…”

Section: Introductionmentioning

confidence: 99%

“…It is thought that Dy 3+ entering Ba-sites as donors can improve the stability of life due to the reduction of oxygen vacancies and the formation of a barrier of grain boundaries that suppresses electromigration of oxygen vacancies [5]. The previous studies have mainly focused on the effects of Dy 3+ on the dielectric and substitution mechanism of BaTiO 3 or Ba(ZrTi)O 3 systems [5]. However, the substitution mechanism of Dy 3+ for the BCTZ system has not been well understood.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Hsiang

Lai

2005

Materials Science and Engineering: B

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Section: Microstructuresmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Hsiang

Lai

2005

Materials Science and Engineering: B

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“…About grain size, Lee et al reported that the reliability is high when grain size is small. 7) On the other hand, Nomura et al and Harmer et al reported that the reliability is high when grain size is large. 6,8) Moreover, Neumann and Arlt reported that reliability is independent of grain size.…”

Section: Correlation Between Reliability Of Mlcs and Microstructure O...mentioning

confidence: 99%

Effects of Grain Boundary and Segregated-Phases on Reliability of Ba(Ti,Zr)O₃-Based Ni Electrode MLCs

Okamatsu

Sano

Takagi

2005

Jpn. J. Appl. Phys.

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The reliability in the highly accelerated life test (HALT) for multilayer ceramic capacitors (MLCs) composed of the Ba(Ti,Zr)O3-Gd-Mg-Mn-Si system was markedly improved by controlling the amount of SiO2 and the ratio of Ba/(Ti+Zr). We observed the following characteristics in the microstructures when the reliability was improved. 1) The segregated-phases, which consisted of Mg oxides and Si oxides, were dispersed well in the dielectric layers and their size was considerably small. 2) The corrosion resistance of grain boundaries was improved. 3) The electric potential as a contrast in the focused ion beam scanning ion microscopy was homogeneous in both the grains and the grain boundaries. We can design these microstructures by controlling the additives to generate BaMg2Si2O7 and BaSi2O5, which have low melting points.

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“…(Ti) , 16,17 and Ho 3ϩ (Ti) 18 can act as strong acceptors for conduction electrons in BaTiO 3 , showing thermal activation energies of Ͻ1.5 eV. 19 Electrical degradation of BME materials is assumed to result from migration of charged oxygen vacancies of [V O…”

Section: Dy 3ϩmentioning

confidence: 99%

Kinetic Process of Reoxidation of Base Metal Technology BaTiO₃‐Based Multilayer Capacitors

Opitz

Albertsen

Beeson

et al. 2003

Journal of the American Ceramic Society

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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 18O 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.

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Effect of Dy Doping on Resistance Degradation of (Ba)(Ti, Zr)O3 Sintered in Reducing Atmosphere under Highly Accelerated Life Test.

Cited by 8 publications

References 0 publications

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Effects of Grain Boundary and Segregated-Phases on Reliability of Ba(Ti,Zr)O₃-Based Ni Electrode MLCs

Kinetic Process of Reoxidation of Base Metal Technology BaTiO₃‐Based Multilayer Capacitors

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Effect of Dy Doping on Resistance Degradation of (Ba)(Ti, Zr)O3 Sintered in Reducing Atmosphere under Highly Accelerated Life Test.

Cited by 8 publications

References 0 publications

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Microstructure evolution and electric properties with addition amounts of dysprosium (DyO1.5) in (BaCa)(TiZr)O3 ceramics

Effects of Grain Boundary and Segregated-Phases on Reliability of Ba(Ti,Zr)O3-Based Ni Electrode MLCs

Kinetic Process of Reoxidation of Base Metal Technology BaTiO3‐Based Multilayer Capacitors

Contact Info

Product

Resources

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Effects of Grain Boundary and Segregated-Phases on Reliability of Ba(Ti,Zr)O₃-Based Ni Electrode MLCs

Kinetic Process of Reoxidation of Base Metal Technology BaTiO₃‐Based Multilayer Capacitors