A comparative study of lead-free (Ba0.85Ca0.15)(Ti0.9Zr0.08Sn0.02)O3 ceramics prepared by conventional sintering and microwave sintering techniques

Cai, Enpei; Liu, Qibin; Zeng, Fangfang; Xue, An

doi:10.1016/j.ceramint.2017.10.001

Cited by 18 publications

(4 citation statements)

References 18 publications

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“…Some parameters relevant to dielectric relaxation properties are given in Table 3, in which T cw , T B and T m respectively represent the Curie-Weiss temperature, the starting temperature conforming to the Curie-Weiss law and the temperature when the permittivity reaches its maximum value. Above T cw , the 1/ε r value of the general ferroelectric body should have a linear relationship with the temperature, that is in accordance with Curie's temperature law (as shown in functional Equation ( 4)) [35]: Table 3. Some parameters extracting from Figure 6.…”

Section: Dielectric Relaxation Behaviorsupporting

confidence: 59%

“…It is not difficult to observe from Figure 5 that with the increase of frequency, the corresponding ε r value of samples in each group near the Curie temperature decreases, and the width of the Curie temperature peak becomes wider. This phenomenon reflects the diffuse phase transition behavior the dielectric constant, which is one of the typical characteristics of the relaxed ferroelectrics [35]. Based on this discovery, the dielectric relaxation properties of BCZT samples are further studied.…”

Section: Electrical Propertiesmentioning

confidence: 84%

“…Therefore, such ferroelectrics that do not conform to Curieweis's law are called relaxant ferroelectrics. The 1/ε r and temperature of the relaxation ferroelectric conforms to the optimized Curie-Weiss law, as in Equation ( 5) [35]:…”

Section: Dielectric Relaxation Behaviormentioning

confidence: 87%

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Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Mao

Zheng

et al. 2023

Materials

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The (Ba0.85Ca0.15) (Ti0.90Zr0.10)O3 + x Y3+ + x Nb5+ (abbreviated as BCZT-x(Nb + Y), x = 0 mol%, 0.05 mol%, 0.1 mol%, 0.2 mol%, 0.3 mol%) lead-free piezoceramics samples were prepared by a traditional solid-state sintering method. And the effects of Yttrium and Niobium elements (Y3+ and Nb5+) co-doping on the defect, phase and structure, microstructure, and comprehensive electrical properties have been investigated. Research results show that the Y and Nb elements co-doping can dramatically enhance piezoelectric properties. It is worth noting that XPS defect chemistry analysis, XRD phase analysis and TEM results together show that a new phase of double perovskite structure Barium Yttrium Niobium Oxide (Ba2YNbO6) is formed in the ceramic, and the XRD Rietveld refinement and TEM results show the coexistence of the R-O-T phase. Both these two reasons together lead to significant performance improvements of piezoelectric constant (d33) and planar electro-mechanical coupling coefficient (kp). The functional relation between temperature and dielectric constant testing results present that the Curie temperature increases slightly, which shows the same law as the change of piezoelectric properties. The ceramic sample reaches an optimal performance at x = 0.1% of BCZT-x(Nb + Y), where d33 = 667 pC/N, kp = 0.58, εr = 5656, tanδ = 0.022, Pr = 12.8 μC/cm2, EC = 2.17 kV/cm, TC =92 °C, respectively. Therefore, they can be used as potential alternative materials to lead based piezoelectric ceramics.

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Section: Dielectric Relaxation Behaviorsupporting

confidence: 59%

Section: Electrical Propertiesmentioning

confidence: 84%

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Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Mao

Zheng

et al. 2023

Materials

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“…Some scholars have reported that the dielectric properties of materials can be improved by sintering methods such as spark plasma sintering, microwave sintering, [ 10,11 ] which opens up a new way to optimize the dielectric properties of BST‐based ferroelectric–dielectric composite ceramics. However, there are still few studies on the properties of ferroelectric–dielectric two‐phase composite ceramics by microwave sintering.…”

Section: Introductionmentioning

confidence: 99%

Study on the Intrinsic Correlation between Sintering Method, Ion Diffusion, and Dielectric Properties of Ba_0.5Sr_0.5TiO₃‐ZnAl₂O₄ Composite Ceramics

Zhang

Xin

Zhang

et al. 2023

Cryst. Res. Technol.

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Ba 0.5 Sr 0.5 TiO 3 -ZnAl 2 O 4 composite ceramics of different components are prepared by solid-phase sintering and microwave sintering, respectively. The ion diffusion phenomenon between the two phases under different sintering methods and the effect of sintering method on the microstructure and dielectric properties of composite ceramics are studied. The results show that during solid-phase sintering, the generation of liquid phase can effectively enhance the ion diffusion between the two phases. Compared with solid-phase sintering, microwave sintering effectively reduces the sintering temperature of composite ceramics, and the refinement of grains enhances the ion diffusion between the two phases, resulting in an increase in the Ba/Sr ratio, and the Curie temperature moves to high temperature and increases the tunability. Under microwave sintering conditions, when the ZnAl 2 O 4 content is 50 wt%, the tunability of the composite ceramics reaches 40.03%, and it has a good Q-value.

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Ceramics with Ultrahigh Permittivity Values: Compositions, Synthesis Methods, and Properties at Low and Medium Frequencies

Ponomarev,

Bazarova,

Akin’shin

et al. 2024

Glass Ceram

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A comparative study of lead-free (Ba0.85Ca0.15)(Ti0.9Zr0.08Sn0.02)O3 ceramics prepared by conventional sintering and microwave sintering techniques

Cited by 18 publications

References 18 publications

Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Study on the Intrinsic Correlation between Sintering Method, Ion Diffusion, and Dielectric Properties of Ba_0.5Sr_0.5TiO₃‐ZnAl₂O₄ Composite Ceramics

Ceramics with Ultrahigh Permittivity Values: Compositions, Synthesis Methods, and Properties at Low and Medium Frequencies

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A comparative study of lead-free (Ba0.85Ca0.15)(Ti0.9Zr0.08Sn0.02)O3 ceramics prepared by conventional sintering and microwave sintering techniques

Cited by 18 publications

References 18 publications

Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Yttrium and Niobium Elements Co-Doping and the Formation of Double Perovskite Structure Ba2YNbO6 in BCZT

Study on the Intrinsic Correlation between Sintering Method, Ion Diffusion, and Dielectric Properties of Ba0.5Sr0.5TiO3‐ZnAl2O4 Composite Ceramics

Ceramics with Ultrahigh Permittivity Values: Compositions, Synthesis Methods, and Properties at Low and Medium Frequencies

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Product

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Study on the Intrinsic Correlation between Sintering Method, Ion Diffusion, and Dielectric Properties of Ba_0.5Sr_0.5TiO₃‐ZnAl₂O₄ Composite Ceramics