Ferroelectric, piezoelectric and mechanical properties in lead free (0.5)Ba(Zr0.2Ti0.8)O3–(0.5)(Ba0.7Ca0.3)TiO3 electroceramics

Srinivas, A.; Krishnaiah, R. V.; Niranjani, V.L.; Kamat, S.V.; Karthik, T.; Asthana, Saket

doi:10.1016/j.ceramint.2014.08.127

Cited by 59 publications

(26 citation statements)

References 19 publications

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“…In contrast, Q m showed an opposite tend. Specifically, Q m reached a minimum value of 78.17 at x = 0.4 %, and the relative lower Q m than the literature could enhance the frequency band of the electron component [15,28]. The observed trend around PPT regions was attributed to the relatively low internal stress and weak pinching effects of the domain wall in the PPT region [36,37].…”

Section: Resultsmentioning

confidence: 62%

“…Among the research, 0.5Ba 0.7 Ca 0.3 TiO 3 -0.5BaTi 0.8 Zr 0.2 O 3 (BCT-BZT) system materials had been received significant attention for the comparable piezoelectric properties with the lead-based materials, since the morphotropic phase boundary region was demonstrated in this system [6]. Moreover, various methods in the preparation and electrical performance research on BCT-BZT system were developed, which promoted the application of lead-free materials for the replacement of lead-based materials [11][12][13][14][15][16]. As known, platinum group elements, e.g., IrO 2 and RuO 2 , have potential application in catalysis, electrochemistry, and microelectronic devices [17,18].…”

Section: Introductionmentioning

confidence: 98%

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Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

et al. 2015

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Lead-free ceramics 0.5Ba 0.7 Ca 0.3 TiO 3 -0.5BaTi 0.8 Zr 0.2 O 3 -xIrO 2 (x = 0-1.2 %) were prepared at a low temperature of 1260°C via sintering the as-synthesized nanoparticles, which were synthesized by a modified Pechini polymeric precursor method. All samples featured high levels of densification under the synthesis conditions; particularly, the ceramic prepared at IrO 2 content of 0.4 % achieved the highest relative density (*97.4 %). Phase transition from tetragonal to orthorhombic and a polymorphic phase transition (PPT) region were observed, which were influenced by the IrO 2 content. The dielectric properties, temperature coefficient of capacitance, ferroelectric properties, and piezoelectric properties as a function of IrO 2 content were thoroughly studied. Optimal electrical properties (remnant polarization, piezoelectric constant, and planar electromechanical coupling factors, i.e., P r = 6.28 lC/cm 2 , d 33 = 199 pC/N, and k p = 0.258) were obtained around the PPT region. The findings of the ceramic electrical properties by IrO 2 doping are believed to be insightful in the development of lead-free dielectric and ferroelectric materials.

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Section: Resultsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 98%

Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

et al. 2015

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“…The Hall-Petch equation follows a linear relationship between the yield stress and the grain size, but from the graph, the observed hardness not perfectly shows the linear relation with grain size; this is may be due to limitation of the equation for the grain size of less than 1 μm 35 . In this regard, a relative study between these materials is exhibited in Figure 11 10 The excellent hardness of RB3 and RB4 (10.36 and 11.75 GPa, respectively) shows the pathway to use these materials as an orthopedic implant. In this regard, a relative study between these materials is exhibited in Figure 11 10 The excellent hardness of RB3 and RB4 (10.36 and 11.75 GPa, respectively) shows the pathway to use these materials as an orthopedic implant.…”

Section: Resultsmentioning

confidence: 99%

“…It has been seen that most of the implants (especially Totally Knee Replacement [TKR] implant) fail prematurely or after 20 years. 10 Recently, Karthik et al have obtained the Vickers hardness of 10.2 GPa for the lead free Na 0.5-x K x Bi 0. To avoid revision surgery, a lead based piezoelectric material is embedded in the implants.…”

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confidence: 99%

Investigation on the discharge energy storage density of the Rb substituted Na_0.5Bi_0.5TiO₃ relaxor ferroelectric and its suitability for the orthopedic application

et al. 2019

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The higher hardness along with the excellent dielectric and ferroelectric properties of the ferroelectric material is always required for its direct application. In spite of that, in comparison to the ferroelectric and piezoelectric properties, the study of the hardness property of the ferroelectric materials is almost deprived. Herein, we had showed the improvement in the hardness and relaxor property of the Rb substituted Na0.5Bi0.5TiO3 (NBT) with the variation of the grain size. The emergence of the polar nano region, which is responsible for the relaxor behavior, was verified with the addition of Rb (or with the reduction of the grain size). This interesting behavior was explained through the temperature dependent “order parameter” of all compositions. The reduced coercive field helped to enhance the discharge energy storage density up to 0.71 J/cm3 for the 4 mole % Rb substituted NBT. The same composition had the hardness of 11.75 GPa, which showed its excellent resistance to the abrasion. These outcomes showed the possibility of the current material to replace the lead based piezoceramics. Moreover, to utilize this material as an orthopedic implant, its biocompatibility was assessed in vitro. As an advantage, by using the current lead free piezoelectric material as an implant, the failure of the implant can be evaluated noninvasively.

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“…It is well known that Ti 4+ and Zr 4+ possess the identical valence, but Zr 4+ has more chemical stablity and larger ionic size. So the substitution of Zr for Ti would decrease the leakage current, induce good thermal stability and depress the conduction caused by hopping between Ti 4+ and Ti 3+ 33, 34 . Moreover, BNT-based ceramics have been recognized as potential lead-free ferroelectric materials owing to their large saturated polarization.…”

Section: Introductionmentioning

confidence: 99%

High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics

Yang

Yan

Lin

et al. 2017

Sci Rep

111

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A series of (1-x)Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3-xNa0.73Bi0.09NbO3 ((1-x)LLBNTZ-xNBN) (x = 0-0.14) ceramics were designed and fabricated using the conventional solid-state sintering method. The phase structure, microstructure, dielectric, ferroelectric and energy storage properties of the ceramics were systematically investigated. The results indicate that the addition of Na0.73Bi0.09NbO3 (NBN) could decrease the remnant polarization (P r) and improve the temperature stability of dielectric constant obviously. The working temperature range satisfying TCC 150 °C ≤±15% of this work spans over 400 °C with the compositions of x ≥ 0.06. The maximum energy storage density can be obtained for the sample with x = 0.10 at room temperature, with an energy storage density of 2.04 J/cm3 at 178 kV/cm. In addition, the (1-x)LLBNTZ-xNBN ceramics exhibit excellent energy storage properties over a wide temperature range from room temperature to 90 °C. The values of energy storage density and energy storage efficiency is 0.91 J/cm3 and 79.51%, respectively, for the 0.90LLBNTZ-0.10NBN ceramic at the condition of 100 kV/cm and 90 °C. It can be concluded that the (1-x)LLBNTZ-xNBN ceramics are promising lead-free candidate materials for energy storage devices over a broad temperature range.

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Ferroelectric, piezoelectric and mechanical properties in lead free (0.5)Ba(Zr0.2Ti0.8)O3–(0.5)(Ba0.7Ca0.3)TiO3 electroceramics

Cited by 59 publications

References 19 publications

Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

Investigation on the discharge energy storage density of the Rb substituted Na_0.5Bi_0.5TiO₃ relaxor ferroelectric and its suitability for the orthopedic application

High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics

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Ferroelectric, piezoelectric and mechanical properties in lead free (0.5)Ba(Zr0.2Ti0.8)O3–(0.5)(Ba0.7Ca0.3)TiO3 electroceramics

Cited by 59 publications

References 19 publications

Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

Structure and electrical properties of IrO2-doped 0.5Ba0.7Ca0.3TiO3–0.5BaTi0.8Zr0.2O3 ceramics via low-temperature sintering

Investigation on the discharge energy storage density of the Rb substituted Na0.5Bi0.5TiO3 relaxor ferroelectric and its suitability for the orthopedic application

High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics

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Investigation on the discharge energy storage density of the Rb substituted Na_0.5Bi_0.5TiO₃ relaxor ferroelectric and its suitability for the orthopedic application