Structure, dielectric, and ferroelectric properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics sintered at various temperatures

Wang, X. W.; Zhang, B. H.; Li, Y. Y.; Shi, Y. C.; Sun, Li; Feng, Guobao; Li, C. L.; Liang, Yifan; Zheng, Yun; Shang, Shuying; Shang, Jun; Hu, Yidan; Yin, Shengyong

doi:10.1007/s10854-020-03030-5

Cited by 13 publications

(6 citation statements)

References 40 publications

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“…However, there are not only the frequency that can influence on , but it is also the grain size. It was found that, as grain size of the BCZT ceramic increased,  decreased due to the occurrence of long-range ferroelectric interaction and domain thickening, as reported by Wang et al [15].…”

Section: Frequency-dependent Dielectric Propertiessupporting

confidence: 60%

“…It is apparent that peak overlapping can be seen in the enlargement of (200)p reflection in both powder and ceramic which suggested that the occurrence of mixed phase was observed at room temperature. In addition, the enhancements of sharpness and clear splitting of (200)p reflection were found in the ceramic sample, indicating the improvement of crystallization from high sintering temperature [15]. Interestingly, although Wang [14] reported that the shifting of (200)p reflection to lower 2 was observed in the BCZT ceramic in comparison with the BCZT powder due to the occurrence of the residual stress in the ceramic, this work found the contradict result; the (200)p reflection of the BCZT ceramic shifts to higher 2 instead.…”

Section: Xrd Profiles At Room Temperaturementioning

confidence: 84%

“…Consequently, while many publications reported that the phase formation of (1-x) BZT-(x)BCT where x=0.5 was R-T mixed phases as indicated in the previous phase diagram [5,[8][9][10], the coexistence of orthorhombic-tetragonal (O-T), monoclinic-tetragonal (M-T), or rhombohedral-orthorhombictetragonal (R-O-T) also found by others [11][12][13]. Moreover, some researchers have mentioned that it is difficult to identify phase formation of (1-x)BZT-(x)BCT where x=0.5 [14][15]. This signifies that the identification of phase formation for (1-x) BZT-(x)BCT where x=0.5 or Ba0.85Ca0.15Ti0.9Zr0.1O3 is still unclear and controversial.…”

Section: Introductionmentioning

confidence: 83%

“…Moreover, as frequency increases from 1 kHz to 100 kHz, the maximum of dielectric permittivity at Tm slightly decreases from 6897 to 6635, while Tm gradually shifts from 91.6C to 91.8C. The shifting of Tm to higher temperature when the frequency increased indicated the occurrence of relaxor behavior in BCZT ceramic [15]. Note that further analysis in the paraelectric region (T > Tm) from Figure 4(a) according to the modified Curie-Weiss law will be determined and shown in Figure 7.…”

Section: Temperature-dependent Dielectric Propertiesmentioning

confidence: 95%

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Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

et al. 2021

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Large piezoelectric properties was observed in (1-x)BZT-(x)BCT where x=0.5 or Ba0.85Ca0.15Ti0.9Zr0.1O3 (denoted as BCZT), leading to a promising candidate for lead-free piezoelectric materials. However, phase formation of the BCZT is controversial and still unclear since various phase coexistences were identified in the literatures, for instances, the mixed phases of rhombohedral-tetragonal (R-T), ortho-rhombic-tetragonal (O-T) or rhombohedral-orthorhombic-tetragonal (R-O-T). Additionally, it is well known that the crystal structure plays a crucial role on the occurrence of polarization in the piezoceramics. Therefore, this work aims to investigate the coexistence of phase formation at room temperature for the BCZT powder and ceramic. Moreover, the electrical properties as a function of temperature, frequency and electric field were observed in order to evaluate the extrinsic contribution of piezoelectric response. It was found that, according to the results from temperature-dependent dielectric properties as well as Rietveld refinement of XRD profiles, the coexistence of O-T phase was observed in the BCZT powder and ceramic. Furthermore, the enhancement of Ca2+ substitution into Ba2+ site in BCZT ceramic caused the shrinkage of unit cell, leading to the shift of XRD profile and Raman spectra. In addition, it was found that the applications of frequency and electric field can influence on changes of domain-wall motion and micro-polar cluster in the BCZT piezoceramic.

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Section: Frequency-dependent Dielectric Propertiessupporting

confidence: 60%

Section: Xrd Profiles At Room Temperaturementioning

confidence: 84%

Section: Introductionmentioning

confidence: 83%

Section: Temperature-dependent Dielectric Propertiesmentioning

confidence: 95%

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Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

et al. 2021

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“…For all samples the grain boundary resistance value is higher compared to grain resistance because the grain boundaries are normally more insulating and capacitive than grains [54]. With the increase in temperature, grain boundary resistance decreases and conductivity increases and can be attributed to the ionisation of oxygen vacancies at high temperatures [55]. Fig.…”

Section: Temperature-dependent Dielectric Analysismentioning

confidence: 85%

Structural, dielectric and ferroelectric properties of Cu2+- and Cu2+/Bi3+-doped BCZT lead-free ceramics: a comparative study

Kumari

Kumar

et al. 2021

J Mater Sci: Mater Electron

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Perovskite typeBa0.98Ca0.02Zr0.02Ti0.98O3 (BCZT), Ba0.98Ca0.02Zr0.02Ti0.976Cu0.008O3 (BCZTC) and Ba0.9725Bi0.005Ca0.02Zr0.02Ti0.976Cu0.008O3(BCZTCB) lead-free ceramics were synthesised via solid-state reaction method at a sintering temperature of ~1380 °C. Effects of CuO and Bi2O3/CuO doping on structural, microstructural, dielectric, and ferroelectric properties were investigated systematically. X-ray diffraction technique confirmed the existence of pure perovskite phase with the tetragonal structure in pure and in the doped BCZT ceramics at room temperature. The dielectric analysis demonstrated two anomalies around 24 °C and 126 °C for BCZT, which were identified as orthorhombic to tetragonal (TO-T) and tetragonal to cubic (TC) phase transition temperature, respectively. The TO-T temperature shifted to below 16 °C, while the TC increased to 132 °C for the BCZTCB sample. The physical mechanisms of the conduction processes were investigated through impedance spectroscopy and the values of resistance, conductivity, and activation energies associated with the grain and grain boundaries were evaluated. The activation energy was determined to be higher for doped samples than for pure BCZT. Further, the dopant-dependent ferroelectric nature of the ceramic samples was evidenced by the analysis of characteristic hysteresis loop, and a value of remnant polarisation (Pr = 4.59 C/cm 2 ) was obtained for the BCZTCB ceramic sample. Furthermore, the d33 value, which was 54 pC/N for pure BCZT, was determined to be 140 pC/N and 64 pC/N for BCZTC and BCZTCB, respectively.

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Bi(Li1/2Nb1/2)O3 addition inducing improved energy storage performance in lead-free BCZT ceramics

Dang

Cao

et al. 2023

Appl. Phys. A

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Structure, dielectric, and ferroelectric properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics sintered at various temperatures

Cited by 13 publications

References 40 publications

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

Structural, dielectric and ferroelectric properties of Cu2+- and Cu2+/Bi3+-doped BCZT lead-free ceramics: a comparative study

Bi(Li1/2Nb1/2)O3 addition inducing improved energy storage performance in lead-free BCZT ceramics

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