Article
Physics, Condensed Matter
Yang Zhang, Mingling Li, Shengyan Yang, Jiwei Zhai
Summary: The technology of low-temperature sintering is crucial for the preparation of ceramic multilayer actuator. A novel three-step sintering approach was used to synthesize CuO-(K0.5Na0.5)(0.95)Li0.05Nb0.93Sb0.07O3-CaZrO3 lead-free piezoelectric ceramics at 700 degrees C, resulting in good piezoelectric properties with d(33) = 238 pC/N.
SOLID STATE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Youness Hadouch, Said Ben Moumen, Hanane Mezzourh, Daoud Mezzane, M'barek Amjoud, Bouchra Asbani, Anna G. Razumnaya, Yaovi Gagou, Brigita Rozic, Zdravko Kutnjak, Mimoun El Marssi
Summary: The study investigates the structural, dielectric, ferroelectric, energy storage properties, and electrocaloric effect of lead-free ceramic BCTSn prepared by the sol-gel method. It reveals the coexistence of tetragonal and orthorhombic symmetries in BCTSn at room temperature. The results demonstrate that BCTSn ceramic shows a significant electrocaloric temperature change and high energy storage efficiency, making it a promising candidate for environmentally friendly refrigeration and energy storage applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Song Dai, Liqiang Xu, Kun Han, Pingfan Chen, Ke Wang, Zhen Huang, Wenbin Wu, Feng Chen
Summary: By investigating the epitaxial (K0.oa0.oi0.02)(Ta0.2Nb0.8)O3 film on the La0.03Ba0.97SnO3-coated LaAlO3 substrate with MnO2 addition, the abnormal lattice evolution and enhanced electrical properties are observed as the growth oxygen pressure increases. High oxygen pressure can increase the number of K cations in the lattice and suppress leakage behavior, leading to improved electrical properties. Meanwhile, the films exhibit excellent transparency and thermal stability.
INORGANIC CHEMISTRY
(2022)
Review
Materials Science, Multidisciplinary
Onat Tokay, Murat Yazici
Summary: The use of piezoelectric materials is increasing, and lead-based piezoceramics are being replaced by lead-free piezoceramics due to the trend of avoiding toxic materials. By using dopants, improving preparation techniques, and achieving coexistence of multiple phases, the piezoelectric properties of lead-free piezoceramics can be enhanced.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Hao Chen, Jie Xing, Jingwen Xi, Tao Pu, Hong Liu, Jianguo Zhu
Summary: A high-performance PZT-based piezoelectric ceramic with Ta2O5 additive was prepared via low-temperature sintering, resulting in low domain wall movement activation energy and high piezoelectric response. The study revealed that the higher the tetragonal phase content, the smaller the domain structure, leading to improved piezoelectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Hongwei Shi, Kai Li, Feng Li, Jianxing Ma, Yubing Tu, Mingsheng Long, Yilin Lu, Weiping Gong, Chunchang Wang, Lei Shan
Summary: This study designs the (1 - x) (0.65BiFeO(3)-0.35BaTiO(3))-xLa(0.5)Na(0.5)TiO(3) (BF-BT-xLNT) system, and significantly improves the piezoelectric properties, relaxor property, and resistivity of the material by adding La(0.5)Na(0.5)TiO(3). The thermal stability of electrostrain is achieved at the x = 0.04 composition, making this material suitable for high-temperature piezoelectric and stable electrostrain applications.
Article
Chemistry, Physical
Kui Chen, Jian Ma, Caiyun Shi, Wenjuan Wu, Bo Wu
Summary: By phase engineering and co-doping with Ta and Sb, the piezoelectric performance and temperature stability of KNNTSx-BSNZ ceramics have been improved, expanding the application potential of KNN-based ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Hailing Ma, Mohamed Ahmed Ismael
Summary: AgNbO3-based ceramics have broad research prospects in dielectric energy storage due to their unique antiferroelectric properties. By adjusting the tolerance factor and phase transition temperature, the stability of the material can be improved, which is of great significance for the development of lead-free energy storage materials.
CERAMICS INTERNATIONAL
(2022)
Review
Acoustics
Yungang Yu, Ting Zheng, Nan Zhang, Jiagang Wu
Summary: This article discusses the effects of sintering aids on the sintering characteristics and microstructure of KNN-based ceramics, and provides reference for selecting sintering aids.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Materials Science, Ceramics
Qianjie Li, Shuaishuai Ji, Dongdong Wang, Jiangyuan Zhu, Leiyu Li, Wei Wang, Min Zeng, Zhipeng Hou, Xingsen Gao, Xubing Lu, Qiliang Li, Jun-Ming Liu
Summary: In this study, a series of novel lead-free relaxor ceramics were prepared by solid phase sintering, and it was found that the component with x = 0.75 exhibited a large recoverable energy density and efficiency under a low electric field. Additionally, the optimized ceramics showed good thermal stability and fatigue endurance in energy storage performances.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Jincymol Joseph, Yumeng Du, Zhenxiang Cheng, Shujun Zhang
Summary: The fabrication of ceramic capacitors requires breakthroughs in technology to address concerns about sustainability, cost, and power consumption. A low temperature sintered xBiScO(3)-(1-x)BaTiO3 (BS-BT) with x = 0.4 has been found to have excellent energy storage performance and temperature stability. The use of this material leads to improved breakdown field and energy storage properties due to decreased grain size. This study also explores the compatibility of different electrode materials, expanding the possibilities for cost-effective production.
Article
Materials Science, Ceramics
Mengye Yin, Minxia Fang, Lixue Zhang, Chao Zhou, Andong Xiao, Yuanchao Ji, Tianyu Ma, Xiaobing Ren
Summary: This study demonstrates that acceptor doping with Mn in lead-free piezoceramics leads to higher depolarization temperature and improved piezoelectric thermal stability. The clamping effect induced by acceptor doping is identified as the mechanism behind these enhancements.
CERAMICS INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
Jie Yin, Xiaoming Shi, Hong Tao, Zhi Tan, Xiang Lv, Xiangdong Ding, Jun Sun, Yang Zhang, Xingmin Zhang, Kui Yao, Jianguo Zhu, Houbing Huang, Haijun Wu, Shujun Zhang, Jiagang Wu
Summary: This study investigates the atomic-scale structure of lead-free relaxor ferroelectric Bi0.5Na0.5TiO3-based system and its relationship to the polar structure evolution and large dynamic electromechanical response. It is found that increased defect concentration is the main driving force for deviating polarizations with high-angle walls, while the driving force for deviating polarizations with low-angle walls changes. The competitive and synergetic equilibrium of anisotropic field versus random field contributes to the giant electromechanical response.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Deva Sucharitha Chakram, Varimalla Raghavendra Reddy, S. Nabanita Kumar, Madhavaprasad Dasari
Summary: Lead-free K1/2Na1/2NbO3 (KNN) powder was synthesized at a low temperature of 700°C for 2 hours using the molten-salt process in the eutectic mixture of KCl-NaCl. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study its purity, phase formation, and surface morphology. Dielectric permittivity and impedance spectroscopy were measured from 1 Hz to 1 MHz at temperatures ranging from room temperature to 580°C. The piezoelectric coefficient constant d(33) of KNN was determined to be 90 x 10(-12) pC/N. The relaxation behavior and conductivity contributions of grain and grain boundary were analyzed using Nyquist and Cole-Cole plots. The antibacterial activity of KNN was also tested.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
P. (Joseph) Liu, K. Wang, L. Li, R. Zhang, Z. P. (Gordon) Xu
Summary: Musculoskeletal conditions are becoming more prevalent and causing disability. Functional biomaterials, particularly piezoelectric materials, are receiving considerable interest in musculoskeletal tissue engineering. These materials can produce electrical signals in response to mechanical stimuli, making them highly relevant for regeneration processes. Compared to traditional electrotherapy, piezoelectric materials eliminate the need for external power sources and offer advantages for musculoskeletal tissue remodeling. This review focuses on the progress of lead-free piezoelectric materials in musculoskeletal tissue engineering, providing an interdisciplinary overview and clinical outlook.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Materials Science, Ceramics
Yuntao Huang, Haoyue Xue, Ting Zheng, Jiagang Wu
Summary: Achieving excellent pyroelectric performance is challenging for lead-free piezoelectric ceramics. In this study, (1-x)K0.48Na0.52NbO3-xBi(0.5)Ag(0.5)ZrO(3)-0.2%Fe2O3 (KNN-BAZ-Fe) lead-free ferroelectric ceramics with high Curie temperatures were prepared to improve pyroelectric performance. The variation of BAZ content promoted grain growth and resulted in the best pyroelectric coefficient when x = 0.05.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yumin Zhang, Yungang Yu, Nan Zhang, Ting Zheng, Jiagang Wu
Summary: By constructing multilayer composite ceramics and doping Ho element, both improved piezoelectric and strain temperature stability are achieved, showing great property advantage compared with previous reports.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yanli Huang, Boyan Lv, Chunlin Zhao, Jie Yin, Yabin Wang, Yang Wang, Xinmiao Fu, Tianmin Wu, Jiagang Wu, Xianzeng Zhang
Summary: In this study, eco-friendly BaTiO3-based perovskite ferroelectrics with tailored multiphase coexistence were constructed to enhance piezoelectricity and piezo-potential, and achieve efficient reactive oxygen species (ROS) generation. The designed BT-based piezocatalyst showed a higher generation rate of center dot OH and center dot O-2(-) compared to pure BT, and also exhibited excellent capacity to degrade dye wastewater and eliminate E. coli.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wenbin Liu, Ting Zheng, Xuezheng Ruan, Zhenyong Man, Haoyue Xue, Laiming Jiang, Fuping Zhang, Guorong Li, Jiagang Wu
Summary: This study proposes a synergetic strategy to address the contradiction between piezoelectric performance and temperature stability in PZT-based piezoelectric ceramics by introducing lead vacancies through niobium doping and constructing a morphotropic phase boundary. By designing the PBZTN-x material system, good comprehensive properties and excellent temperature stability were achieved in the PBZTN-0.540 ceramics.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yang Li, Ting Zheng, Bing Li, Jiagang Wu
Summary: The resistivity and leakage current of bismuth ferrite-barium titanate-based ceramics have been regulated in this study by changing the relaxation degree and defect dipoles. Introduction of Sb led to improved resistivity in relaxor ferroelectrics with chemical-homogeneous grain structure and strip-shaped/submicron-sized coexisted domains, while deteriorated properties appeared in relaxors with core-shell structure and tweed-like ferroelectric domains. The improved insulation in relaxor-ferroelectrics was attributed to decreased concentration of oxygen vacancies and Ti3+, while the emergence of core-shell structure and conductive channels resulted in decreased resistivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Dongcai He, Weijie Wang, Nan Feng, Ziqiang Zhang, Dali Zhou, Jing Zhang, Hongrong Luo, Yunfeng Li, Xianchun Chen, Jiagang Wu
Summary: Multidrug-resistant bacteria caused by the overuse of antibiotics present a significant threat to global health. Utilizing reactive oxygen species (ROS) as an antibacterial method can effectively prevent bacterial resistance. Piezocatalytic material-mediated sonodynamic therapy (SDT), which is capable of generating ROS, has attracted attention. However, the low ROS generation efficiency of piezocatalytic materials is a major challenge. This study successfully synthesized a US-responsive self-doped barium titanate with controlled oxygen vacancy (Vo) concentrations, and found that the sample BTO-400 exhibited the highest piezocatalytic activity and excellent sonodynamic antibacterial performance. In vivo results also demonstrated the potential of BTO-400 in sterilization and skin tissue repair through SDT therapy.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jiayang Liao, Xiang Lv, Xi-xi Sun, Junhua Li, Haomin Wang, Qiang Chen, Hanpeng Lu, Duan Wang, Jian Bi, Jiagang Wu
Summary: A new and simple strategy integrating phase boundary engineering and defect engineering is proposed to enhance the piezo-catalytic activity of potassium sodium niobate (KNN) based materials. This strategy is validated by introducing phase boundary engineering and conducting defect engineering via high-energy sand-grinding. The resulting sample shows superior reaction rate constant and bactericidal properties, indicating its potential for harnessing natural energy and disease treatment.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chao Wu, Xiaopeng Wang, Ying Tang, Haoyin Zhong, Xin Zhang, Anqi Zou, Jiliang Zhu, Caozheng Diao, Shibo Xi, Junmin Xue, Jiagang Wu
Summary: A fundamental understanding of the surface reconstruction process is crucial for the development of efficient electrocatalysts based on the lattice oxygen oxidation mechanism (LOM). Contrary to previous beliefs, the surface reconstruction in LOM-based metal oxides is found to be a spontaneous chemical reaction process rather than an electrochemical process. During this process, lattice oxygen atoms are attacked by adsorbed water molecules, leading to the formation of hydroxide ions (OH-). The leaching of metal-site soluble atoms from the oxygen-deficient surface also occurs. Additionally, it is discovered that enhancing surface hydrophilicity can accelerate the surface reconstruction process, providing further insights into the mechanism.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Deqing Tai, Xuan Zhao, Ting Zheng, Jiagang Wu
Summary: BiFeO3-BaTiO3 (BF-BT) based lead-free piezoceramics are desired for high-temperature applications of piezoelectric sensors with a high Curie temperature and good piezoelectric properties. Oxygen vacancies have a significant effect on electrostrain and piezoelectric properties, but the relationship between oxygen vacancy concentration and these properties is complex. This study explores the influence of oxygen vacancy concentration on the transient piezoelectric response, aging behavior, and temperature stability of BF-BT ceramics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Materials Science, Multidisciplinary
Xiaojun Wu, Lanji Wen, Chao Wu, Xiang Lv, Jie Yin, Jiagang Wu
Summary: Due to the demand for environmental protection, developing eco-friendly piezoelectric applications/materials is an inevitable trend. The market share of lead-free materials, particularly Bi0.5Na0.5TiO3 (BNT), is growing steadily due to its superior strain property. While chemical modification is the mainstream strain regulation method, the intrinsic strain regulation mechanism and the role of dopants in BNT-based materials are still ambiguous. This review explores the intrinsic strain regulation mechanism from both macro and micro perspectives, providing insights into the strain origination and regulation methods for rational experimental design.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Yinchang Ma, Xi-xiang Zhang, Jing Lyu, Xiang Lv, Jiagang Wu
Summary: This study investigates the competitive relationship between bismuth ion (Bi3+) and praseodymium ions (Pr3+) in potassium sodium niobate (KNN)-based ceramics. By substituting Bi3+ with Pr3+, the researchers observed changes in the phase structure and electrical properties of the materials, as well as an impact on the piezoelectricity. Experimental findings and calculations reveal the underlying mechanism behind this competition between Bi3+ and Pr3+ ions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Deqing Tai, Bing Li, Haoyue Xue, Ting Zheng, Jiagang Wu
Summary: Rare earth doping is widely used to enhance the electrical properties of piezo/ferroelectric materials. In this study, two types of rare earth ions with different ion radii (La3+ and Sm3+) were introduced into Bi1-xRexFeO3-BaTiO3 ceramics. The results showed that doping an appropriate amount of rare earth ions can effectively improve the ferroelectricity and strain response. The enhancement of electrical properties can be attributed to the increase in the number of activated domains, increased off-centering of Bi ions, displacement of B-site ions, and enhanced lattice deformation. Notably, Sm-doped ceramics exhibited stronger intrinsic ferroelectric and strain response compared to La-doped ceramics, although a larger electric field was required to release the intrinsic response due to the larger ionic radius difference between Bi3+ and Sm3+.
Article
Materials Science, Ceramics
Lingjie Wu, Ting Zheng, Jiagang Wu
Summary: Excellent piezoelectric properties and fatigue resistance have been achieved in KNN-based ceramics with polymorphic multiphase coexistence. The ceramic with multi-phase coexistence exhibits excellent fatigue resistance, while the ceramic with orthorhombic phase shows obvious electrical fatigue.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
