Effect of the A/B ratio on the microstructures and electrical properties of (Ba0.95±xCa0.05)(Ti0.82Zr0.18)O3 for multilayer ceramic capacitors with nickel electrodes

Jain, T. A.; Fung, Kuan‐Zong; Chan, Jenny

doi:10.1016/j.jallcom.2008.01.073

Cited by 35 publications

(24 citation statements)

References 12 publications

(10 reference statements)

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“…The technological relevance of such a study is justified, however, considering that variations of Ba 6 Ti 17 O 40 content led to changes in of ~ 8 °C, as well as in ´ and ´´ of ~ 15 %. 386 In contrast to previous works, secondary phases at the grain boundaries and/or triple junctions were not observed by SEM in BSE mode. 386 This result is in agreement with the XRD study of the sintered samples ( Figure 5.2).…”

Section: Microstructure Characterizationcontrasting

confidence: 84%

“…386 In contrast to previous works, secondary phases at the grain boundaries and/or triple junctions were not observed by SEM in BSE mode. 386 This result is in agreement with the XRD study of the sintered samples ( Figure 5.2). All compositions are characterized by relative densities above 94 %.…”

Section: Microstructure Characterizationcontrasting

confidence: 84%

“…In the case of the (1- 40 were shown to determine to a certain extent the functionality of the system. 386 Variation of the synthesis conditions and secondary phases entails an effect in the defect chemistry. A non-negligible internal bias-field that varied with composition was observed in this work and indicates that defect chemistry should be analyzed since defects affect domain switching processes.…”

Section: Remarks and Future Workmentioning

confidence: 99%

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Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Acosta

2016

Springer Theses

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Section: Microstructure Characterizationcontrasting

confidence: 84%

Section: Microstructure Characterizationcontrasting

confidence: 84%

Section: Remarks and Future Workmentioning

confidence: 99%

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Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Acosta

2016

Springer Theses

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“…18) Maiwa et al reported that 0.5 um thick-Ba(Zr,Ti)O 3 films with a grain size of 50 nm exhibited a permittivity of about 1000, with excellent temperature stability. 19) Many researchers have studied the relationship between crystal structure and the electrical properties of BCZT ceramics 4),19), 20) but sufficient studies have not yet been undertaken on the structure-property relationships of BCTZ ceramics annealed in a reducing atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…19),23) Meanwhile, abnormal grain growth was observed when m was 0.995 because the secondary phase of Ba 6 Ti 17 O 40 acted as a grain growth agent. 20) Figure 6 shows the temperature dependence of the permittivity of BCTZ-x-y-m ceramics with various x, y, and m in (Ba 1¹x Ca x ) m (Ti 1¹y Zr y )O 3 . Figure 6(a) indicates that the addition of small amounts of Ca (x < 0.1) increases the transition Journal of the Ceramic Society of Japan 118 [10] 881-886 2010 JCS-Japan temperature (T c ) by 132°C, while the further addition of Ca decreases the T c and broaden the dielectric peak.…”

mentioning

confidence: 99%

Effects of Ca and Zr additions and stoichiometry on the electrical properties of barium titanate-based ceramics

Choi

Hoshina

Takeda

et al. 2010

J. Ceram. Soc. Japan

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(Ba 1¹x Ca x ) m (Ti 1¹y Zr y )O 3 (BCTZ-x-y-m) ceramics were studied to clarify the effects of Ca and/or Zr addition and the nonstoichiometry of BCTZ ceramics. The range of each element was 0.00 ¼ x, y ¼ 0.25 and 0.995 ¼ m ¼ 1.02. All powders were prepared by a solid state reaction method. Green bodies with disc shapes were sintered at 1500°C for 2 h in air and then reheated at 950°C for 5 h in various reducing conditions. The dielectrics with the substitution of Ca ion in BCTZ-x-0.0-1.01 (x ¼ 0.10) showed an increase in T c and the insulation resistivity improved with increasing x. The increase of Zr content (y) in BCTZ-0.1-y-1.01 and m in BCTZ-0.1-0.1-m led to the phase transition of dielectrics to relaxors, accompanying the decrease of T c . In BCTZ-0.1-0.1-m, Ca and Zr co-doped dielectrics showed a high insulation resistivity (IR), even though m = 1.00. There are two possible origins of the higher resistivity observed in BCTZ with m = 1.0. The first is the acceptor action of Ca ions that moved from Ba sites to Ti sites in BaTiO 3 ; the second is the higher charge stability of the Zr ion than that of the Ti ion in a reducing atmosphere.

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Polarization and space charge performance in PVDF with MPB composition BCZT doped composite films

Liu

Lin

et al. 2017

J of Applied Polymer Sci

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The morphotropic phase boundary composition 47(Ba 0.7 Ca 0.3 )TiO 3 -0.53Ba(Zr 0.2 Ti 0.8 )O 3 (calcium barium zirconate titanate, BCZT) were doped in poly(vinylidene fluoride) matrix by solution casting method. The effect of BCZT particles on polarization characteristics of composite films were investigated through dielectric spectra, hysteresis, and thermally stimulated discharge current measurements. It reveals that relative dielectric constant, remnant polarization, and energy storage density gradually increase and reach the maximum value with 39 at 100 Hz, 1.17 lC/cm 2 , and 3.69 J/cm 3 at the concentration of 20 vol % BCZT. The Gaussian method was employed to decompose thermally stimulated discharge current composite peaks and an approximate model was used to analyze the activation energy levels of these films. The results indicated that the introduction of BCZT is effective for the charge carrier traps and activation energy distribution in the relaxation process of composite films. The decreased molecular movements, and increased interfaces formed between the BCZT grains and the poly(vinylidene fluoride) matrix may be responsible for these performances. And a new relaxation peak appeared at about 370 K in composites when BCZT concentration exceeded 20 vol %, which was considered to be caused by the ferroelectric-paraelectric phase transition of BCZT.

show abstract

Effect of the A/B ratio on the microstructures and electrical properties of (Ba0.95±xCa0.05)(Ti0.82Zr0.18)O3 for multilayer ceramic capacitors with nickel electrodes

Cited by 35 publications

References 12 publications

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Effects of Ca and Zr additions and stoichiometry on the electrical properties of barium titanate-based ceramics

Polarization and space charge performance in PVDF with MPB composition BCZT doped composite films

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