JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 9
·5243-5252
·
IF 3.094
Mengmeng Lun,Wei Wang,Zhifeng Xing,Zhong Wan,Wanying Wu,Hanzhao Song,Yinzhen Wang,Wei Li,Benli Chu,Qinyu He
The Eu 3+ -modified Bi 0.5 Na 0.5 TiO 3 (BNT) ceramics have been fabricated by the solid-state reaction method. The impact of Eu 3+ doping on the structure, photoluminescence, and electrical properties has been studied by XRD, SEM, PL spectra, and LCR meter. X-ray diffraction analysis reveals that the crystal structure of the samples is well matched with the trigonal perovskite, and the optimal temperature of presintering is 880°C. The Eu 3+ -doped BNT ceramics show excellent red fluorescence at 614 nm corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ under 466 nm excitation and relatively long fluorescence lifetime. The BNT-0.02Eu ceramic density is up to 5.68 g/cm 3 and the relative density is up to 94.6% with sintering temperature 1075°C. The piezoelectric constant (d 33 ) of samples has been significantly improved up to 110 pC/N by Eu 3+ doping. The BNT-0.03Eu ceramic presintered at 880°C and sintered at 1050°C has good dielectric properties and excellent luminescence properties. Eu 3+ -doped BNT ceramics make it potential applications for novel integrated electro-optical and multifunctional devices.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 2
·1169-1177
·
IF 3.502
Zhengwei Xiong,Gaomin Liu,Hengchang Nie,Yi Liu,Zhipeng Gao,Qian Liu,Xuefeng Chen,Jun Li,Leiming Fang,Qiang Yang,Xiaoqiang Zhang,Jinlong Tang,Genshui Wang,Xianlin Dong
Ferroelectric materials under shock compression can generate current and power by a drastic change of the remnant polarizations and surface bound charge. This behavior has been employed in applications involving nuclear fusion trigger, energy storage devices, and high pulse power sources. Despite the large power output in lead-containing ferroelectrics, lead-free materials are highly desirable owing to the environmental concerns. Herein, the phase transition behaviors and current outputs of 0.92Bi 0.5 Na 0.5 TiO 3 -0.08BiAlO 3 (BNT-8BA) materials are studied under high pressure. The BNT-8BA ferroelectric ceramics can be completely depolarized from polar to the nonpolar state under shock compression, resulting in a current output in the external circuit. The phase-transition-induced depolarization pressures of BNT-8BA are lower than those of the pure Bi 0.5 Na 0.5 TiO 3 under both dynamic and static high-pressure loads. These results can allow the understanding of the high-pressure behavior of BNT-8BA for application as ferroelectric pulsed power supply.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chaolong Li,Feng Wang,Hao Wang,Boying Wang,Xinru Sun,Xingcan Peng,Weikun Li,Chunli Diao,Haiwu Zheng
To meet the demand for miniaturization and integration of electronic and electrical equipments, developing dielectric capacitors with excellent energy storage properties is of utmost importance. Bi 0.5 Na 0.5 TiO 3 -based ceramics have been investigated extensively for potential energy storage applications. However, its low breakdown strength E b and high remnant polarization P r limit the energy storage density and efficiency ( η ). Therefore, we explored a synergistic design strategy of domain control and grain size adjustment via La doping to successfully synthesize 0.8Bi 0.5 Na 0.5 TiO 3 -0.2NaNbO 3 - x La 2 O 3 (0.8BNT-0.2NN- x La 2 O 3 ) ceramics with superior energy storage properties to overcome above issues. It shows that the composition regulation by antiferroelectric NaNbO 3 results in improved disrupted long rang order ferroelectric domain structure, effectively promoting the formation of polar nanoregions, subsequently weakening P r and enhancing relaxation behavior. The introduction of antiferroelectric NaNbO 3 effectively improves the η of the system. Moreover, the grain size is decreased and densification is enhanced after La tailoring, which is beneficial for the E b and recyclable energy storage density ( W rec ). Finally, a high W rec of 4.40 ± 0.20 J/cm 3 and η of 80.1 ± 2.1% at 450 kV/cm are obtained in 0.8BNT-0.2NN-0.07La 2 O 3 ceramic. Besides, the sample demonstrates admirable temperature stability (25–175 °C) and frequency stability (10–100 Hz). Simultaneously, it displays stable discharge energy density, rapid discharge time of 0.36 μs, and good fatigue endurance (10 5 cycles). The results offer useful guidance for the design of novel ceramic capacitors with comprehensive energy storage performance.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Xuefan Zhou,Guoliang Xue,Hang Luo,Xi Yuan,Dou Zhang
The inverse relationship between piezoelectric coefficient ( d 33 ) and depolarization temperature ( T d ) in Bi 0.5 Na 0.5 TiO 3 -based ceramics is a longstanding obstacle for their applications. In this work, synergistically enhanced d 33 and T d is achieved in AlN-modified 0.84Bi 0.5 Na 0.5 TiO 3 -0.11Bi 0.5 K 0.5 TiO 3 -0.05BaTiO 3 ceramics. Addition of 1 mol% AlN, increases both d 33 from 165 to 234 pC/N and T d by ∼50 °C. Rietveld analysis of X-ray powder diffraction (XRD) data reveals an increase in the proportion of the tetragonal phase at 1 mol% AlN incorporation. Moreover, at this composition the modified ceramics exhibit larger grains and high-density lamellar nanodomains with sizes of 30–50 nm. Polarization reversal and domain mobility are thus significantly enhanced, contributing to the large d 33 . Temperature-dependent dielectric and XRD data revealed that the delayed thermal depolarization is attributed to the improved and poling-field stabilized tetragonality in the modified ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Peng Wang,Shiqi Zhong,Mei Lin,Cong Lin,Tengfei Lin,Min Gao,Chunlin Zhao,Xiangqi Li,Xiao Wu
Recently, the lead-free piezoelectric material Bi 0.5 Na 0.5 TiO 3 (BNT) has been adopted for piezo-catalysis and synergistic catalysis, such as piezo-photocatalysis. Nonetheless, the catalytic effect of single BNT is too weak to degrade multifarious contaminants. Here, BNT and multi-walled carbon nanotubes (MWCNTs) composite were prepared and the catalytic performance of BNT was prominently boosted by introducing MWCNTs as the electron capturer. Particularly, the degradation rate of Rhodamine B (RhB, a typical contaminant) could reach 90% within 30 min, with a high rate constant of 0.0805 min −1 . The specific degradation pathway of RhB was analyzed. The formation of oxygen vacancies was confirmed by XPS analysis, and the vital role of oxygen vacancies in the separation of photo-generated carriers was elucidated. Meanwhile, the BNT/MWCNTs composites manifested stronger transient current response compared to single BNT under the action of light irradiation and ultrasonic vibration, respectively. According to impedance analysis, the composites exhibited lower carrier transport resistance. Eventually, the mechanism of enhanced piezo-photocatalysis was explained in detail. This study provides an effective route to break the shackle of carrier recombination and speed up the carrier transport in piezo-photocatalytic materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 8
·1812
·
IF 3.1
Wanlu Xu,Wenwu Wang,Xiaoshan Zhang,Ping Yu
Positive temperature coefficient of electrical resistivity (PTCR) materials with low Curie temperature have been paid increasing attention lately. In this study, PTCR materials with a Curie temperature of approximately −15 °C were investigated by La3+doping Ba0.55Sr0.45TiO3ceramics. It could be expected to meet the requirements of thermal management systems for low-temperature control. In addition, a trace amount of Bi0.5Na0.5TiO3(BNT) was employed to improve the resistivity and the PTCR performance. A significant PTCR effect was achieved with a high resistivity jump of nearly four orders of magnitude, a high temperature coefficient of ~28.76%/°C, and a narrow transition temperature span of 22 °C in the (Ba0.55Sr0.45)0.99875La0.00125Ti1.01O3-0.0025Bi0.5Na0.5TiO3ceramics. The PTCR enhancement mechanism of BNT is discussed.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 8
·1801
·
IF 3.2
Qian Wang,Lin Zhang,Rui Li,Hui Yang,Chuanhui Wang,Zhao Xiong,Chunwu Liu
The excellent temperature stability and high saturation polarization of Bi0.5Na0.5TiO3(BNT) make it a promising candidate for energy storage capacitors. However, its disadvantages, such as low breakdown strength, high remnant polarization, and a complex sintering process, limit its further development. To address this, (1 −x) Bi0.5Na0.5TiO3−x Sr(Mg1/3Nb2/3)O3ceramics were fabricated, where ion doping was employed to modify the domain structure, reduce the grain size, and improve the energy storage performance. With the increase in dopant concentration, the evolution from long-range-ordered ferroelectric micro-domains into short-range-ordered randomly oriented polar nanoregions (PNRs) was revealed, as demonstrated by XRD and Raman spectroscopy. This resulted in a diffuse phase transition peak and a significant reduction in remnant polarization. However, the saturation polarization also decreased. Finally, the optimal energy storage performance was achieved at a medium dopant concentration (x= 0.10), accompanied by reduced grain size and a dense microstructure. This composition exhibited a discharged energy density of 1.64 J/cm3at a low electric field of 150 kV/cm, representing a notable improvement over pure BNT, which showed a highly lossy P-E loop and a discharged energy density of only 0.14 J/cm3at the same electric field.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Can Zhao,Nan Li,Shirui Zhang,Xinding Lv,ALabdulsalam Mohammed Nasser,Yue Li,Shuqian Sun,Jiangquan Ma
Water splitting to produce H 2 and oxygen reduction to synthesize H 2 O 2 have become an effective strategy to meet energy needs due to their sustainability. However, simultaneous production of H 2 O 2 and H 2 in a catalytic system is still challenging. Herein, we constructed a novel MoSe 2 /Bi 0.5 Na 0.5 TiO 3 (MS/BNT) Z-type heterojunction as a piezo-photocatalyst for hydrogen and hydrogen peroxide production. Under the condition of piezoelectric photocatalysis, the optimized 5% MS/BNT catalyst achieved significant double high activity: the hydrogen evolution (HER) rate was as high as 3365.94 μmol/g/h, and the H 2 O 2 yield was 2784.5 μmol/g/h, which was 28 times and 14.7 times that of pure BNT, respectively. This excellent bifunctional catalytic performance is due to the synergistic effect of Z-scheme heterojunction and piezoelectric field, which effectively promotes the spatial separation of electron-hole pairs, thus greatly improving the simultaneous generation efficiency of H 2 and H 2 O 2 . This study provides a key new idea for the design of piezoelectric photocatalysts that can efficiently and synergistically produce a variety of high-value products (such as H 2 and H 2 O 2 ).
研究领域:
能量转换
·
催化
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Xingang Xu,Xiujuan Lin,Fanghui Yang,Shifeng Huang,Xin Cheng
The low-yield and high-recombination rate of carriers are the main factors that limit the efficiency of traditional piezocatalysis and photocatalysis. In this paper, the Bi0.5Na0.5TiO3@TiO2 composite catalyst with heterojunction was prepared and applied to obtain superior piezo-photocatalytic activity. On the one hand, the narrow band gap (2.77 eV) made it easy for the composite to excite photogenerated carriers under visible light. On the other hand, the piezoelectric field that originated from the bending deformation of Bi0.5Na0.5TiO3 effectively promoted the separation and migration of carriers. Driven by ultrasonic vibration and visible light irradiation, the poled composite catalyst degraded over 97% of RhB dye solution through piezo-photocatalytic effect in 90 min. Compared with pure BNT and TiO2, the enhanced catalytic performance of the BNT@TiO2 composite indicated the superiority of the heterojunction.
研究领域:
材料科学
·
环境科学
·
催化
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 5
·1119-1128
·
IF 6.707
Zhong Mingqiang,Feng Qin,Yuan Changlai,Liu Xiao,Zhu Baohua,Meng Liufang,Zhou Changrong,Xu Jiwen,Wang Jiang,Rao Guanghui
In this work, the (1− x )Bi 0.5 Na 0.5 TiO 3 - x BaNi 0.5 Nb 0.5 O 3 (BNT-BNN; 0.00 ⩽ x ⩽ 0.20) ceramics were prepared via a high-temperature solid-state method. The crystalline structures, photovoltaic effect, and electrical properties of the ceramics were investigated. According to X-ray diffraction, the system shows a single perovskite structure. The samples show the normal ferroelectric loops. With the increase of BNN content, the remnant polarization ( P r ) and coercive field ( E c ) decrease gradually. The optical band gap of the samples narrows from 3.10 to 2.27 eV. The conductive species of grains and grain boundaries in the ceramics are ascribed to the double ionized oxygen vacancies. The open-circuit voltage ( V oc ) of ∼15.7 V and short-circuit current ( J sc ) of ∼1450 nA/cm 2 are obtained in the 0.95BNT-0.05BNN ceramic under 1 sun illumination (AM1.5G, 100 mW/cm 2 ). A larger V oc of 23 V and a higher J sc of 5500 nA/cm 2 are achieved at the poling field of 60 kV/cm under the same light conditions. The study shows this system has great application prospects in the photovoltaic field.
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 27
·12317-12324
·
IF 3.5
Lu Ye,Zhang Ji,Zhao Xinyi,Zhou Kedong,He Lei
Ceramic capacitors are receiving increasing interest because of their applications in pulsed-power devices. The perovskite oxide Bi 0.5 Na 0.5 TiO 3 (BNT)-based ferroelectric ceramics are regarded as prospective lead-free candidate for dielectric capacitors because of the high polarization and outstanding relaxor behaviour. Herein, the relaxor ferroelectric (0.7− x )Bi 0.5 Na 0.5 TiO 3 –0.3SrTiO 3 – x Ca 0.7 Sm 0.2 TiO 3 ceramics synthesized through solid-state route and exhibited pseudocubic perovskite structure and strong relaxor behaviour. With increasing Ca 0.7 Sm 0.2 TiO 3 content, the moderate permittivity and reduced grain size contributed to the monotonically increased electric breakdown strength. Among prepared samples, the x = 0.2 ceramic displayed slimmer polarization-electric field curves with a remarkable recoverable energy density (~6.8 J/cm 3 ) and a satisfied efficiency (~82.2%) under external electric field of 450 kV/cm. Moreover, the x = 0.2 ceramic also exhibited a superb thermal reliability of energy storage properties (3.9–4.5 J/cm 3 with variation of 13.3% in 25–160 °C) resulting from the diffuse phase transition. The above results make the x = 0.2 ceramics becoming promising candidates for pulsed-power devices.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-12
·
IF 2.8
Zhu Haipeng,Wu Jinyuan,Hussain Fayaz,Ni Tao,Li Jiajing,Wang Yan,Xi Hao,Mao Minmin,Hu Ji,Liu Bing,Song Kaixin
Bi 0.5 Na 0.5 TiO 3 (BNT)-based ceramics with excellent electrostrain properties are considered to be one of the most promising lead-free alternative systems. In this work, appropriately deviating from the morphotropic phase boundary (MPB) range, the ceramics of (1− x )(0.75Bi 0.5 Na 0.5 TiO 3 -0.25Bi 0.5 K 0.5 TiO 3 )- x CaZrO 3 (abbreviated as 0.75BNT-0.25BKT- x CZ, x = 0, 0.01, 0.03, 0.05) were synthesized by the solid-state reaction method. The phase structure combined with the dielectric, ferroelectric, and field-induced strain properties was systematically analyzed. The X-ray diffraction patterns showed that CZ was well incorporated into the 0.75BNT-0.25BKT structure to form a single-solid solution. As CZ content increases, the phase structure constructed by the coexistence of rhombohedral and tetragonal phases gradually transforms into the pseudocubic phase. Meanwhile, the dielectric temperature spectra demonstrated the coexistence of ferroelectric and relaxor phases during the phase transition with the formation of the weakly coupled relaxor, implying the presence of nanodomains which were further confirmed by the high-resolution transmission electron microscopy image. Interestingly, the maximum unipolar strain of 0.34% with a prominent increase of 70% and the hysteresis of 33% with a moderate increase of 26% were obtained simultaneously at x = 0.03 as compared to those at x = 0 (0.75BNT-0.25BKT). Further to this, this study investigated the origin of the large strain together with hysteresis variation and considered that reversible phase transition combined with relaxation behavior helps realize a tradeoff between large strain and low hysteresis, which provides an effective path for the further development of high-performance lead-free piezoelectric ceramics.
研究领域:
材料科学
·
陶瓷
·
压电材料
·
功能材料
·
固态化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）