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
Materials Science, Multidisciplinary
Trang An Duong, Mukhlishah Aisyah Devita, Hyoung-Su Han, Jae-Shin Lee
Summary: Lead-free composites synthesized using a conventional method exhibit high strain capability at low electric fields, making them highly competitive in practical applications.
Article
Engineering, Electrical & Electronic
Zhenglei Yu, Hao Qian, Yunfei Liu, Yinong Lyu
Summary: This study investigated LaAlO3-modified piezoelectric ceramics and found that the crystal structure changes with a certain substitution, leading to improved electrical performance. This conclusion was drawn through various experimental methods.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Huajie Luo, Shiyu Tang, Zheng Sun, Yueyun Zhang, Yonghao Yao, Huashan Zheng, Jikun Yang, Yang Ren, Mingxue Tang, Houbing Huang, Hui Liu, Manuel Hinterstein, Jun Chen
Summary: In order to improve the thermal stability of Bi0.5Na0.5TiO3-based piezoelectrics, the researchers introduced Ag into BNT-6BT, forming BNT-6BT/100xAg composite ceramics. Experimental results show that when x=0.06, the depolarization temperature (Td) of the composite ceramics is improved to 145 degrees Celsius without compromising the piezoelectric response. This improvement is attributed to the synergistic effect of residual thermal stress, colossal grain size (above 200 μm), and oxygen vacancies. The study provides an effective method to enhance the thermal stability of BNT-based ceramics and can be applied to other systems as well.
Article
Engineering, Electrical & Electronic
M. Chandrasekhar, A. Choudhary, Dipak Kumar Khatua, P. Kumar
Summary: Lead-free ceramics with a rhombohedral-tetragonal Morphotropic Phase Boundary were synthesized, where strontium titanate (ST) acted as a grain inhibitor. The polarization-electric field and strain-electric field loop studies showed an increase in non-polar order with higher ST content. The ceramic with x = 0.08 exhibited a relatively large energy storage density at 60 kV/cm, making it suitable for energy storage applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Thi Hinh Dinh, Jae-Shin Lee
Summary: An investigation on ternary lead-free Na0.5Bi0.5TiO3-SrTiO3-ABO(3) piezoceramics reveals that the addition of ABO(3) affects the phase transition temperature and ferroelectric order of the materials. Microwave sintering method shows potential for creating lead-free piezoactuator materials with high performance.
Article
Chemistry, Physical
Xing-Ye Tong, Zong-Zheng Du, Yu-Ting Yang, Ming-Wei Song, Jia-Jun Zhou, Hai-Bin Zhang, Chun-Lin Guan, Hong Liu, Jing-Zhong Fang
Summary: The MnO2 modified BNT-24ST lead-free piezoceramics exhibit excellent electrostrain performance and temperature stability, making them a promising candidate for piezoactuator applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Peng Shi, Tangyuan Li, Xiaojie Lou, Zhonghai Yu, Xiaopei Zhu, Chao Zhou, Qida Liu, Liqiang He, Xiaoxiao Zhang, Sen Yang
Summary: The study found that BNT-9(BCT-BZT) ceramics exhibit a large field-induced strain of 0.42% and large reverse piezoelectric coefficient of 547 pm/V; while BNT-10(BCT-BZT) ceramics show a large recoverable energy storage of 3.49 J/cm(3) and high energy storage efficiency of 64.9%. These ceramics are believed to be favorable for practical applications in mobile electronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Muhammad Munir, Muhammad Habib, Salman Ali Khan, Myong-Ho Kim, Soonil Lee, Tae-Kwon Song, Abrar H. Baluch, Ayse Turak, Ali Hussain
Summary: This study reports the synthesis and piezoelectric properties of strontium titanate modified bismuth sodium titanate-barium titanate ceramics, showing that structural transition enhances electromechanical properties and energy storage. The tunable ferroelectric ceramics demonstrate potential for high-performance dielectric capacitor applications based on their energy storage response.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Hanliang Fang, Chen Chen, Faqiang Zhang, Minghe Cao, Zhiguo Yi
Summary: The photostrictive effect, rediscovered due to its potential for wireless remote-control technology, shows remarkable responses in Bi0.5Na0.5TiO3 ceramics under visible light illumination. The direct bandgap semiconductor features a significant photostriction Delta L/L of approximately 0.08%, promising potential applications in multifunctional devices driven by light.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Wei Dong, Gaochao Zhao, Xie Lei, Peng Tong, Jie Yang, Xuebin Zhu, Wenhai Song, Li-hua Yin, Yuping Sun
Summary: We report the structural, piezoelectric, multiferroic and magnetoelectric properties of BF-BKT-BT solid solutions. The samples show a structure transition and maximum piezoelectric coefficient at x≈0.4. They also exhibit good ferroelectricity and essentially antiferromagnetic behavior at room temperature. The converse ME effect increases with x and reaches its peak near x=0.6.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Haipeng Zhu, Jinyuan Wu, Fayaz Hussain, Tao Ni, Jiajing Li, Yan Wang, Hao Xi, Minmin Mao, Ji Hu, Bing Liu, Kaixin Song
Summary: In this study, 0.75BNT-0.25BKT-xCZ ceramics were synthesized and their phase structure, dielectric properties, ferroelectric properties and field-induced strain properties were analyzed. It was found that the ceramics exhibited the maximum unipolar strain and moderate hysteresis at x = 0.03. Further investigation revealed that the tradeoff between large strain and low hysteresis was achieved through reversible phase transition and relaxation behavior.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Nguyen Quoc Dung, Nguyen Huu Lam, Luong Xuan Dien, Pham Van Vinh, Ngo Duc Quan, Dang Duc Dung
Summary: The room temperature ferromagnetism in Bi0.5Na0.5TiO3 materials can be strongly enhanced by modifying them with YMnO3 as solid solutions. The weak ferromagnetism in pure Bi0.5Na0.5TiO3 changes to ferromagnetism and antiferromagnetic-like with increasing YMnO3 concentration. The maximum magnetic moment is estimated to be around 28.4 memu/g for 9 mol.% YMnO3-modified Bi0.5Na0.5TiO3 as a solid solution. The addition of YMnO3 into Bi0.5Na0.5TiO3 crystals as solid solutions up to 9 mol.% leads to a reduction of the optical bandgap energy from 3.18 eV to 2.01 eV. The reduction of the optical bandgap energy and the significant enhancement of the magnetic moment in YMnO3-modified Bi0.5Na0.5TiO3 compounds are strongly related to the random distribution of Y and Mn cations in the host lattice of Bi0.5Na0.5TiO3 crystals. It is expected that this work will provide a simple way to integrate room temperature ferromagnetism into currently developed green ferroelectric materials.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Binquan Wang, Geng Huangfu, Jie Wang, Hua Li, Yiping Guo
Summary: An innovative strategy based on defect dipoles is proposed to achieve a giant piezoelectric strain coefficient in Li/Sr-doped (K0.5Na0.5)NbO3 lead-free piezoceramics. The enhanced strain performance is attributed to the optimized strain compatibility between the refined stripe domains and nanosized domains. Additionally, the material is able to recover from fatigue-induced strain depletion under the stimulation of bipolar electric fields, which can be explained by the rigid ion model.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Linghao Hou, Changrong Zhou, Qingning Li, Rui Li, Changlai Yuan, Jiwen Xu, Guanghui Rao
Summary: In this study, the relaxation temperature of BNT-6BT material was adjusted to near room temperature, resulting in high dynamic polar nanoregions and moderate polar spatial correlations. The material exhibited high strain and ultra-low hysteresis, as well as excellent temperature and frequency stability.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Yuxin Jia, Huiqing Fan, Ao Zhang, Han Wang, Lin Lei, Qifeng Quan, Guangzhi Dong, Weijia Wang, Qiang Li
Summary: This study develops an extraordinary strategy to obtain giant electrostrain by manipulating defect dipoles in (Bi, Na) TiO3-BaTiO3-based lead-free relaxor ferroelectric (RFE) ceramics, achieving a high electro-induced strain value of 1.68% with a corresponding effective piezoelectric coefficient (d(33)*) of 1965 pm/V. The effect of defect dipoles on RFE ceramics is also discussed. This work proposes a detailed mechanism considering defect dipoles coupling in RFE ceramics and provides a promising paradigm for achieving high electrostrain, which could be applied in designing a wide range of functional ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Chengcai Ye, Yunxia Zhao, Yanrui Li, Xing Zhao, Min Li, Jing Shi, Xiao Liu
Summary: This work investigates the influence of the preparation process on the structure and conduction mechanisms of Bi0.5Na0.5TiO3 (BNT)-based complexes. It is found that the ceramics prepared by tape-casting exhibit a rutile titanium dioxide phase, while the ceramics prepared by conventional solid-state reaction show a pure perovskite phase. The ac impedance spectra reveal different conductive behaviors in the two preparation routes. This study highlights the importance of the preparation route in the structure and conduction mechanisms of BNT-based oxide ionic conductive materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Yanqin Chen, Wenqiang Dong, Weijia Wang
Summary: In this study, an Ag-modified g-C3N4/CdS photocatalyst with a distinctive charge transfer channel was prepared, leading to an enhanced H2 production performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jing Shi, Rizhuang Dong, Jiayi He, Daowei Wu, Wenchao Tian, Xiao Liu
Summary: This study investigated the structural, dielectric, and ferroelectric properties of lead-free ceramics based on the ternary system of BaTiO3 (BT). It was observed that the dopant concentration influenced the structural evolution from tetragonal to pseudocubic phase. The dielectric response showed diffusive peaks and relaxor behavior, indicating a transition from ferroelectric to relaxor state. The ceramics exhibited slim polarization hysteresis loops and electrical inhomogeneities caused by excessive dopant addition, leading to degraded electric breakdown strength. The oxygen vacancy hopping mechanism was proposed to explain the diffuse dielectric response at high dopant concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xian Cheng, Zhiyong Liu, Qinfang Jing, Pu Mao, Kun Guo, Jinshan Lu, Bing Xie, Huiqing Fan
Summary: Piezoelectricity is a highly functional property that has been widely studied in various applications, including piezoelectric catalysis and mechanical energy harvesting. In this work, (K0.5Na0.5)(0.94)Li0.06NbO3 (KNN6L) piezoelectric powders were combined with polydimethylsiloxane (PDMS) to develop flexible and recyclable KNN6L-PDMS porous piezoelectric composites. These composites demonstrated a degradation rate of approximately 91% for Rhodamine B dye wastewater under mechanical vibration, and the piezocatalytic activity remained excellent even after multiple decomposition cycles. Furthermore, COMSOL simulations confirmed the relationship between piezoelectric potential and piezocatalysis. The content of piezoelectric powders positively affected the magnitude of the generated piezoelectric potential. The catalytic mechanism was attributed to the generation of reactive oxygen species, such as center dot O-2(-) and center dot OH, in a water environment due to the strong piezoelectric effect of the porous composites. The flexible and recyclable porous piezoelectric composites exhibited outstanding performance in piezoelectric catalysis, which holds great promise for environmental remediation applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Neng Hu, Di Gao, Xin Cai, Lin Lei, Weijia Wang, Huiqing Fan, Peter Mueller-Buschbaum, Qi Zhong
Summary: Inspired by Tang Dynasty costumes, printable tattoos are developed to monitor UV radiation from sunshine. The hybrid nanogels containing g-C3N4 nanosheets can be photodegraded under sunshine, allowing real-time monitoring of UV radiation. These hybrid nanogels can also be used to trace the dose for vitamin D synthesis, erythema induction, and risk of skin cancer.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yujing Li, Rongrong Rao, Yiyi Wang, Huiling Du, Jing Shi, Xiao Liu
Summary: Different levels of Nb2O5 substitution were used to prepare lead-free relaxors of 0.66(Bi0.5Na0.5)TiO3-0.06BaTiO(3)-0.28(Bi0.2Sr0.7)TiO3 (BS-xNb) in order to investigate the effect of chemical heterogeneity on dielectric and impedance behaviors. The addition of excess Nb2O5 leads to increased secondary phase and higher electronic conductivity. The introduction of Nb2O5 doping enhances disorder and facilitates the transition to the ergodic relaxor phase.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Li Lv, Hong-Dan Yang, Qi-Wen Chen, Huiqing Fan, Jian-Ping Zhou
Summary: Two-dimensional La2Ti2O7 nanosheets with regular morphology and good dispersion were synthesized by a hydrothermal method under a magnetic field. Zero-dimensional Pt quantum dots were successfully loaded on the La2Ti2O7 nanosheets, which significantly enhanced the electron-hole separation and carrier transfer. The Pt-loaded La2Ti2O7 nanosheets exhibited a high photocatalytic ability for NO removal, with an efficiency of 51% for NO removal and low levels of NO2 intermediate pollutant.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Xiuzi Che, Weijia Wang
Summary: This paper presents an efficient strategy for exposing unsaturated edge Ag on the surface of photocatalysts, forming Ag@g-C3N4 heterojunction. The introduction of Ag nanospheres into g-C3N4 enlarges the distance between g-C3N4 nanolayers and increases the exposure of Ag nanospheres. The Ag@g-C3N4 heterojunction provides polyunsaturated edge Ag as active sites and forms unique charge transfer channels, resulting in prolonged lifetime of photogenerated electrons.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Yiyi Wang, Pu Wang, Laijun Liu, Yuyin Wang, Yingying Zhao, Wenchao Tian, Xiao Liu, Fangyuan Zhu, Jing Shi
Summary: This paper reviews the strain characteristics and environmental friendliness of Bismuth sodium titanate (BNT)-based, lead-free piezoelectric materials. The strain regulation methods through chemical modification and defect introduction are discussed. The effects of defect dipoles on strain output are explored.
Article
Crystallography
Hamid Al-Abboodi, Huiqing Fan, Mohammed Al-Bahrani
Summary: The fracture and crack growth of materials can be predicted using numerical analysis and linear elastic fracture mechanics. In this study, experimental work supported by a numerical technique is presented to simulate crack propagation in a coating made from Fe-based amorphous material. The effects of mixed-mode loading on cohesive zone parameters are examined, and two failure criteria (maximum energy release rate and maximum tensile stress) are evaluated. The results show that both criteria are successful in predicting crack propagation in the Fe-based amorphous material.
Article
Materials Science, Multidisciplinary
Zhennan Wang, Dingze Lu, Min Zhou, Kiran Kumar Kondamareddy, Zhenhuan Zhao, Zheng Wang, Junfang Wu, Boyu Zhang, Huiqing Fan, Wingkei Ho
Summary: A series of MoS2/Zn0.5Cd0.5S composites with varying concentrations of flower-like MoS2 were prepared and characterized. The introduction of flower-like MoS2 can promote the separation of photogenerated electron-hole pairs and enhance the photocatalytic performance. This study provides a feasible method for efficiently photocatalytic dehydrogenation and synergistic selective oxidation of organic substrates.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Kang Yan, Yongbo Fan, Fulong Hu, Gang Li, Xueya Yang, Xinyu Wang, Xiaomin Li, Chao Peng, Weijia Wang, Huiqing Fan, Longtao Ma
Summary: Solid polymer electrolyte-based batteries are promising due to their safety, wide voltage window, and flexibility. However, their low ionic conductivity and mechanical strength, as well as weak resistance to oxidation/reduction, limit their use in Zn ion batteries. In this study, a polymer-in-salt Zn2+-conductive solid electrolyte was developed using a simple phase transition method. It exhibited high ionic conductivity, transfer number, and stable voltage window, leading to improved performance and cyclic stability in Zn ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Lin Lei, Weijia Wang
Summary: Two-dimensional materials have attracted great interest due to their large specific surface area and adjustable surface behaviors, showing potentials for enhancing energy conversion activity and optimizing properties. Defect engineering on 2D materials has been widely studied to regulate the physicochemical properties of photocatalysts for water splitting reactions. This study prepared AgBr/g-C3N4 catalyst and discovered a unique charge transfer pathway. The findings provide insights into heterostructure construction and property optimization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
