JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xin-Yu Kang,Zhi-Hao Zhao,Yu-Kai Lv,Yejing Dai
The large temperature dependence of electro-strain for Bi 0.5 Na 0.5 TiO 3 (BNT)-based ceramics limits their practical applications. In this work, Li-doped BNT-based lead-free multi-layer piezoelectric ceramic actuators are prepared by solid-state reaction synthesis method. The multi-layer actuator structure is fabricated by gradient doping, in which each layer corresponds to different compositions, with enhanced temperature stability compared to the single-layer one. For specific composition, it could achieve maximum electro-strain value at a certain temperature. Therefore, the electro-strain of each layer in this BNT-based multi-layer actuator could compensate each other at different temperatures with improved temperature stability. Consequently, the electro-strain of the five-layer structure varies less than ∼12% when the temperature changes from 50 °C to 130 °C, and a large electro-strain of 600 pm/V could be obtained at 70 °C. This work provides an effective approach by gradient doping to broaden the use temperature range for BNT-based actuators with improved temperature stability.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Weiping Zhou,Chenyu Ma,Chunlin Ma,Zhangyin Zhai,Weishi Tan
A series of Sm 3+ doped 0.92(Na 0.5 Bi 0.5 )TiO 3 -0.08(Ba 0.90 Ca 0.10 )(Ti 0.92 Sn 0.08 )O 3 (NBT-8BCTS: x Sm 3+ , x = 0–0.025) lead-free piezoelectric ceramics are fabricated via a conventional solid-state reaction method, and their phase structure, photoluminescence properties and temperature dependent of luminescence spectra are studied in detail. The emission spectra with dominant orange-red emission consist of four emission peaks at 542 nm, 598 nm, 644 nm and 709 nm, which are ascribed to the 4 G 5/2 → 6 H J/2 (J = 5, 7, 9, 11) transition of Sm 3+ ions, respectively. Furthermore, the optical temperature sensing properties of the NBT-8BCTS: 0.01Sm 3+ ceramic in the temperature range between 313 K and 533 K are analyzed with a maximum relative sensitivity 1.29%K −1 at T = 463 K. Besides, the phosphors exhibit excellent stable temperature sensing performance under repeated heat-cooling cycles. These results suggest that the Sm 3+ doped NBT-8BCTS ceramics may have potential applications in multifunctional sensing devices by integrating its optical temperature sensing and intrinsic ferroelectric property .
研究领域:
材料科学
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光学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 11
·7184-7192
·
IF 2.1
Yang Shengyan,Chang Niannian,Han Mengyuan,Zhang Yang
Pb-free piezoelectric ceramic materials (K 0.48 Na 0.48 Li 0.04 )(Nb 0.92 Ta 0.08− x Sb x )O 3 (KNLNTS) were designed and prepared. The effects of varied Sb/Ta doping on the physical structure, surface morphology, and electrical characteristics of ceramics were also studied. The perovskite structure is present in all of the doped ceramic samples without any secondary phase (when x < 0.05). All of the doped ceramic samples have a Curie temperature ( T C ) above 300°C. At the same time, the orthorhombic–tetragonal phase transition temperature ( T O–T ) is pushed closer to ambient temperature. Doping with Sb/Ta/Li changed the electrical characteristics of the samples and increased their piezoelectric properties. At x = 0.03, the KNLNTS sample has the best piezoelectric properties: d 33 = 215 pC/N, Pr = 26.08 μC/cm 2 , T C = 342.6°C.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 1
·93-102
·
IF 5.7
Yao Huang,Xinyue Song,Renbing Sun,Hai Jiang,Peng Du,Laihui Luo
It is a great challenge to prepare dense (K,Na)NbO3 (KNN)-based ceramics with low volatilization of K+/Na+ ions utilizing a conventional solid state reaction method. Herein, ternary KNNS–BNZS–BZ ceramics were prepared utilizing the conventional solid state reaction sintering (CS) method and the cold sintering-assisted sintering (CSAS) process. The CSAS process was used to prepare discs using KMnO4 solution as a transient melt and held at 225 °C under a uniaxial pressure of 380 MPa for 30 min. The microstructures and piezoelectric properties of the prepared ceramics were investigated. The density and piezoelectric performances of the ceramics prepared via CSAS are much superior to those of the counterparts by the conventional solid-state reaction. The piezoelectric constant d33 of the CSAS ceramic with strong ferroelectric properties reaches a high value of ∼470 pC N−1. The XRD Rietveld refinement, dielectric–temperature curves and TEM show that the prepared KNNS–BNZS–BZ ceramics have a state of three-phase rhombohedral–orthorhombic–tetragonal (R–O–T) coexistence at room temperature. The enhanced piezoelectric properties of the CSAS ceramics are ascribed to the improved densification and reduced volatilization of K+/Na+ ions by the strategy of CSAS. The present investigation shows that the CSAS method is a potential route for the preparation of KNN-based ceramics.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinyu Liu,Taotao Ai,Yazhong Zheng,Xinyu Chen,Qin Li,Qian Qiu,Ying Zheng,Yuan Zhou,Haikui Song,Kun Yu,Chunlin Song,Haibo Zhang,Yan Yan,Gang Liu
The lead-free piezoelectric ceramics used in piezoelectric actuators have attracted extensive attention owing to their substantial electric-field-induced strain. In this study, The (1- x )Bi 0.5 (Na 0.41 K 0.09 )TiO 3 - x Sr(Hf 0.5 Sb 0.4 )O 3 (BNKT- x SHS) piezoelectric ceramics were synthesized using the conventional solid-state reaction method. The impact of SHS substitution on the microstructure and electrical properties was systematically explored. Among them, the BNKT-0.015SHS sample, featuring ergodic relaxor states, demonstrates a high piezoelectric strain coefficient ( d 33 *) of 785 p.m./V under a low electric field of 50 kV/cm(Strain = 0.392 %). It exhibits a repeatable strain value of 0.47 % under an 80 kV/cm electric field( d 33 * = 590 p.m./V). Moreover, the strain values remain around 0.4 % between room temperature and 100 °C, with variations within 90 %. The heightened repeatable strain response is considered to be linked to the electric field-induced reversible phase transition occurring within the ergodic relaxor state. The higher strain temperature stability is ascribed to the coexistence of quadrilateral polar nanoregions and rhombic polydomain nanoregions. This study provides an effective example for achieving significant strain responses, presenting a feasible candidate material for applications in piezoelectric actuators.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Zhihao Dong,Peiyao Zhao,Xiao Ma,Xiaohui Wang,Jian Jiao
The KNN-based Ni-internal-electrode multilayer piezoelectric actuators (MLAs) possess the advantages of environmental friendliness and low cost. However, the internal stresses in MLAs suppress the performance of ceramic materials and should be optimized for improving the comprehensive performances of MLAs. This study alleviated the generation of internal stresses in MLAs by modifying the electrode pastes and designing the shapes of the internal electrodes, increasing the inverse piezoelectric coefficient d 33 * to 450 pm/V. The temperature stability of MLAs is significantly improved compared to the bulk ceramics, indicating that the internal stresses can also play a positive role in MLAs. In addition, the MLAs experience only a 4.7 % decrease in d 33 * over 5 million fatigue cycles due to the possible delayed propagation of fatigue cracks. The improvement of material properties and the solution to application problems should complement each other, jointly promoting the practicality of lead-free piezoceramics.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Li-Feng Zhu,Bo-Ping Zhang,Shun Li,Gao-Lei Zhao
The (1- x )Bi 1+ y (Fe 0.96 Mg 0.02 Ti 0.02 )O 3 - x BaTiO 3 (abbreviated as B 1+ y FMT- x BT) system was designed to explore the morphotropic phase boundary (MPB) separating rhombohedral ( R ) and tetragonal ( T ) phases, and the mechanism of performance enhancement. The phase structure of samples was discreetly investigated by X-ray diffraction, and Rietveld refinement results of the XRD data revealed that the B 1+ y FMT- x BT ceramics consist of an R phase at x = 0.24, two R and T phases at 0.26 ≤ x ≤ 0.32, and a single T phase at x = 0.34. Because of the MPB and the improvement of resistivity with adding excess Bi compensation, excellent piezoelectric properties of d 33 = 198 pC/N and k p = 30.9%, as well as high Curie temperature T C = 497 °C were achieved in the B 1+ y FMT- x BT system at x = 0.30 and y = 0.02. Here, the large d 33 = 198 pC/N which is the maximum value for the BF-BT-Bi(Mg,Ti)O 3 system so far, and high T C = 497 °C suggest that Bi(Fe,Mg,Ti)O 3 -BaTiO 3 ceramics have good prospects in high-temperature piezoelectric 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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Junhui Tan,Rongxia Huang,Yejing Dai,Zhihao Liang,Jin Feng,Hua-Tay Lin
Lead-free piezoelectric ceramics of the [0.852(Bi 0.5-x Sr x Na 0.5 )-0.11(Bi 0.5 K 0.5 )-0.038Ba]Ti (1-x) Ta x O 3 (designated as BNKT-BT-xTaSr) ternary system were prepared with co-doping of Ta 5+ and Sr 2+ . The purpose of this study is to investigate the effects of co-doping of Ta and Sr element on the microstructure, phase structure electrical properties, and electrostrain behavior of BNKT-BT-xTaSr ceramics. With the increase of Ta 5+ and Sr 2+ doping, the transition temperature ( T F-R ) of the modified doped BNKT-BT-xTaSr ceramics from ferroelectric to relaxed phase decreases to below room temperature (RT). When x = 0.005, the BNKT-BT-xTaSr ceramics reached a large electrostrain of 0.46%( d * 33 = 657 p.m./V) at RT under an electric field of 7 kV/mm, which is caused by the transition from ergodic relaxor phase to ferroelectric phase under a high applied electrical field. In addition, the electrostrain is increased to 0.48% ( d * 33 = 685 p.m./V) under the same electric field after the thermal aging process at 80 °C for two weeks. This study demonstrates that the A/B site co-doping could effectively improve the electrostrain properties of BNKT-BT-xTaSr ferroelectric ceramics .
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 43
·15294-15302
·
IF 6.4
Tianyu Liu,Bo Yan,Jinxu Ma,Qiang He,Linan An,Kepi Chen
The development of dielectric capacitors for applications under medium-low fields is of great significance to the integration and miniaturization of electronic circuits. Lead-free piezoelectric ceramics based on the morphotropic phase boundary (MPB) compositions have made great progress in the past two decades. In this study, we selected an MPB composition of 0.8525BNT–0.10995BKT–0.03755BT (BBNKT) as the matrix and Sr(Mg1/3Nb2/3)O3 (SMN) as the end member to form relaxor ferroelectric ceramics for energy storage applications. We showed that 0.85BBNKT–0.15SMN ceramics exhibited a recoverable energy storage density Wrec of 3.53 J cm−3 and an efficiency η of 86.3% at a medium-low electric field of 310 kV cm−1. The ceramics also exhibited good thermal stability (25 °C–180 °C), frequency stability (1 Hz–100 Hz), and fatigue resistance (>105 cycles). The current study provided a new idea for the compositional design of energy storage ceramics by modifying the piezoelectric ceramics with MPB compositions into high-entropy relaxor ferroelectrics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Feng Luo,Denghui Jiang,Yinghao Zhu,Yumei Tan,Hongyu Yang,Zhimin Li
The high strain hysteresis has impeded lead-free piezoelectric ceramics to replace lead zirconate titanate ceramics applied in actuators. In this study, we report a significant advancement with the synthesis of a novel BiFeO 3 -BaTiO 3 -(Ba 0.6 Sr 0.4 )TiO 3 (BF-BT-BST) system. The optimal composition has demonstrated a remarkable strain of 0.42 % coupled with a notably low hysteresis of 21 %. It is found that the incorporation of BST into BF-BT facilitates the transition from the rhombohedral phase to the pseudo-cubic phase, which in turn significantly enhances the relaxor ferroelectric characteristics of the ceramic. Through adjusting the composition proportion of BST, a unique ferroelectric domain structure is established for the BF-BT-0.04BST ceramic, where polar nanoregions (PNRs) are surrounded by ferroelectric macrodomains. The domain structure enables the ceramic to have the ability to respond the external electric field quickly compared to the PNRs for typical relaxor composition, thereby leading to large strain and low hysteresis simultaneously. Hence, it is inferred that the ferroelectric macrodomains simplify the response process of the PNRs under electric field. This study provides an efficient strategy to break through the bottleneck of large strain hysteresis for BF-BT ceramic, and gives a deep comprehension for the improvement of the strain characteristics.
研究领域:
材料科学
·
固体力学
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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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qian Qiu,Yanghao Xu,Xinyu Liu,Haikui Song,Yuan Zhou,Zeyu Lv,Shaofei Zhang,Jinfeng Sun,Hongliang Du,Gang Liu,Yan Yan
BNT-based piezoelectric ceramics have garnered considerable attention owing to their potential to exhibit large electrostrain. However, irreversible phase transitions and domain structure alterations lead to limited effective strain and poor temperature stability, which restricts their application in high-precision displacement devices, representing a major bottleneck in current research. In this study, 0.82Bi 0.5 Na 0.5 TiO 3 –0.18Bi 0.5 K 0.5 TiO 3 (BNKT) was selected as the base composition, and an A/B-site co-doping strategy was employed to develop a (Ba 0.5 Sr 0.5 )HfO 3 (BSH) composite modification system. By precisely adjusting the BSH doping concentration ( x = 0–0.03), the ferroelectric – relaxor phase transition temperature ( T F-R ) was effectively shifted to below room temperature, thereby significantly lowering the field-induced phase transition energy barrier. Finally, the BNKT-0.02BSH ceramic exhibits a high piezoelectric strain coefficient ( d 33 ∗) of 648 pm/V under an electric field of 65 kV/cm, along with a strain response of 0.475 % at 80 kV/cm. Meanwhile, the strain stability remains above 85 % over the temperature range of 30–100 °C. Multi-scale characterization techniques, including X-ray diffraction and temperature-dependent Raman spectroscopy, confirmed that the improved performance enhancement is attributed to BSH modification, which increases local structural heterogeneity and significantly promotes electric field-induced reversible phase transitions between the relaxor to ferroelectric states. This study offers novel insights into the understanding of the composition-structure-property relationship.
研究领域:
材料科学
·
陶瓷
·
固体物理
·
电陶瓷
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）