Article
Materials Science, Multidisciplinary
Hina Sugimoto, Jonas Biggemann, Tobias Fey, Priya Singh, Deepak Khare, Ashutosh Kumar Dubey, Ken-ichi Kakimoto
Summary: A scaffold with high antimicrobial properties was successfully fabricated using (Ba, Ca)(Ti, Zr)O3 (BCTZ) and coated with 13-93 bioactive glass. The polarized surface of the BCTZ scaffold showed a good antibacterial response, resulting in a significant reduction in the survival rate of Escherichia coli bacteria. Overall, this approach can improve biocompatibility, prevent ion leaching, and provide good antibacterial characteristics to the scaffolds.
Article
Materials Science, Ceramics
Xianghui Chen, Yan Xue, Bo Zhang, Pengjun Zhao, Yuyu Liu, Xuelian Bai, Bing Wu, Ye Pan, Huimin Zhang, Aimin Chang, Yongxin Xie
Summary: A series of new negative temperature coefficient (NTC) thermal materials based on (Ba0.85Ca0.15)(1-x)Ce-x/2(Zr0.1Ti0.9)O-3 ceramics were synthesized and their crystal structure, morphology, composition and performance characteristics were investigated. It was found that the average grain size of doped ceramic samples experienced a decrease-then-increase trend, and the doping of Ce reduced the sintering temperature. The thermal constant and activation energy initially increased and then decreased with increasing doping amount, and the concentration of oxygen vacancies was influenced by the transition of Ce ions. The (Ba0.85Ca0.15)(1-x)Ce-x/2(Zr0.1Ti0.9)O-3 ceramics exhibited excellent negative temperature characteristics at high temperatures and showed improved temperature resistance linearity after aging.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Andong Xiao, Xuefan Xie, Liqiang He, Yang Yang, Yuanchao Ji
Summary: This study reports a significantly enhanced piezoelectric effect in the single tetragonal ferroelectric phase region in the Sm-modified BCZT-xSm system, attributed to the synergistic effect of large lattice distortion and domain miniaturization.
Article
Materials Science, Ceramics
Xiaofang Wang, Jianshe Yue, Jing Liu
Summary: The use of an appropriate amount of Bi3+/Mn4+ in the (Ba0.85Ca0.15-2xBi2x)(Zr0.1Ti0.9-xMnx)O-3 ceramic system results in a flat temperature stability capacitance curve, with x = 0.020 exhibiting excellent temperature stability, high dielectric constant, and low dielectric loss. This study provides a novel idea for designing new capacitor materials.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Wen-Yuan Pan, Yu-Cheng Tang, Yang Yin, Ai-Zhen Song, Jing-Ru Yu, Sheng Ye, Bo-Ping Zhang, Jing-Feng Li
Summary: This study investigated the phase structure, ferroelectric, dielectric, light absorption, and photovoltaic properties in (Ba0.95Ca0.05)(Ti0.92Sn0.08-xZrx)O-3 ceramics, and found that negatively poled BCTSZ(0.06) ceramics exhibited a large photovoltaic response under simulated sunlight.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Xianghui Chen, Yongxin Xie, Huimin Zhang, Fan Zhang, Yan Xue, Aimin Chang
Summary: The Mn-doped BCZTM NTC thermistor ceramics exhibit excellent NTC properties with a wide working temperature range, making them suitable candidate materials for high temperature and harsh environment applications. The trace Mn-doping can regulate resistivity and activation energy, while excessive Mn-doping leads to the formation of a second phase. With a small aging coefficient at 900 degrees Celsius and good high temperature stability, it shows promise for practical use.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Daniel Drdlik, Dominik Zeman, Pavel Tofel, Zdenek Chlup, Hynek Hadraba, Katarina Drdlikova
Summary: The study investigates the correlation of different piezoelectric measurement methods on various material states, finding that ceramic powder treatment by ball milling and EPD technique can lead to thick and dense deposits. The results show that after sintering, BCZT ceramics can achieve high relative density, hardness, and piezoelectric coefficients.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Cristina Elena Ciomaga, Lavinia P. P. Curecheriu, Vlad Alexandru Lukacs, Nadejda Horchidan, Florica Doroftei, Renaud Valois, Megane Lheureux, Marie Helene Chambrier, Liliana Mitoseriu
Summary: Lead-free piezoelectric ceramics with nominal composition at morphotropic phase boundary Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCTZ) were prepared by different processing routes and sintered using different techniques. The study showed that the ceramics exhibited diffuse phase transition and ferroelectric switching responses, with the electrocaloric and piezoelectric effects being influenced by the density and poling efficiency.
Article
Thermodynamics
Rangel G. Aredes, Andre L. Bonaventura, Renato Boschilia Junior, Ronaldo S. Silva, Eduardo Antonelli
Summary: Lead-free piezoelectric ceramics with perovskite structure can exhibit excellent properties when specific phase transitions sequences and/or coexistence of multiple phases are involved. However, characterizing these phase transitions using isolated techniques can be inconclusive or require complex procedures. This study aimed to explore the combination of different techniques to investigate temperature-induced phase transitions and phase coexistence in ceramics of 0.66Ba(Zr0.2Ti0.8)O-3-0.44(Ba0.7Ca0.3)TiO3 (0.44BCZT), revealing three phase transitions and confirming physical anomalies indicating phase coexistence.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Ceramics
Vijay Bijalwan, Jaroslav Kastyl, Vladimfr Prajzler, Jirf Erhart, Vaclav Pouchly, Karel Maca
Summary: This work presents a promising approach to synthesize multifunctional-translucent BCZT-CeO2 ceramic for electro-mechanical/optical conversion. The ceramics achieved high dielectric permittivity, low dielectric loss, and extraordinary optical transmittance. Post-processing method further improved the piezoelectric properties of the ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Marc Widenmeyer, Joachim Haecker, Cora Bubeck, Songhak Yoon, Oliver Clemens, Anke Weidenkaff
Summary: The possibility of using sequential double anionic substitution for charge compensation in the synthesis of perovskite-type oxynitride fluorides was investigated. It was found that cubic crystal structures were easily formed, but the band gaps were still too large for potential applications in solar water splitting. Further research on alternative synthesis pathways is needed.
SOLID STATE SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
D. D. Dung, N. Q. Huy, N. H. Tuan, N. D. Quan, L. T. Loan, N. H. Linh, N. H. Thoan, N. N. Trung, L. H. Bac
Summary: The biferroic properties of Fe-doped Ba(Ti0.8Zr0.2)O-3 materials were investigated, showing a reduction in optical band gap and influence on room temperature ferromagnetism. The nonlinear polarization of the host Ba(Ti0.8Zr0.2)O-3 materials remained after Fe doping, extending their applications to smart electronics.
Article
Chemistry, Physical
Qiangwei Kou, Bin Yang, Yuan Sun, Shuai Yang, Linjing Liu, Hang Xie, Yunfei Chang, Shantao Zhang, Fei Li
Summary: This study demonstrates that tailoring grain orientations of tetragonal lead-free ceramics can effectively enhance and stabilize the piezoelectric response. Ceramics textured along the <001>(c) polar axis show higher piezoelectric properties and better temperature stability compared to those with nonpolar <111>(c) texture.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Yongli Zhang, Xingfeng Xu, Shuyang Wang, Li Wang, Gang Du, Jiangtao Zeng
Summary: The effects of different sintering atmospheres (O2, N2, and air) on the dielectric, ferroelectric, and piezoelectric properties of PNNZT ceramics were investigated. The results showed that the sintering atmospheres have a significant impact on the properties of PNNZT ceramics. PNNZT ceramics sintered in O2 exhibited the best piezoelectric properties, while those sintered in N2 showed the lowest piezoelectric properties but with good temperature stability. The variation in electrical properties among ceramics sintered in different atmospheres may be attributed to different vacancy defect types.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Min Shang, Pengrong Ren, Yuhui Wan, Xu Lu
Summary: Doping rare earth element significantly affects the electrical properties of BaTiO3-based ceramics. In this study, Y-doped (Ba0.95Ca0.05)(Zr0.19Ti0.81)O3 (BCZT) ceramics were investigated by comparing their microstructure, dielectric, and conduction properties with Y ions doped at different sites, A-site, B-site, and A/B-site, respectively. Y ions were successfully incorporated into the BCZT lattice, regardless of the doping sites. A-site doping had marginal effects on grain size and Curie temperature, while B-site doping led to a decrease in grain size and Curie temperature with doping concentration. The grain size and Curie temperature of the A/B-site doping sample depended on doping concentration. Furthermore, the Tc regulation mechanism was discussed based on theories such as the average size effect, variance effect, local electric field, and tolerance factor. This work provides a potential strategy for adjusting Tc and improving dielectric performance by tuning the doping sites and selecting appropriate rare earth elements with suitable size.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(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
Physics, Applied
Xiaojun Wu, Chao Wu, Lanji Wen, Jie Yin, Jiagang Wu
Summary: For Bi0.5Na0.5TiO3 (BNT)-based materials, regulating temperature and composition can induce giant electro-strain under the critical condition. However, only the temperature-dependent regulation method achieves low hysteresis and maintains a high strain under high ergodic condition. The discrepancy between these two regulation methods lies in their different regulation mechanisms, especially in terms of the microscopic structure and polar entities.
APPLIED PHYSICS LETTERS
(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
Materials Science, Ceramics
Lingjie Wu, Zhi Tan, Ting Zheng, Jiagang Wu
Summary: By adjusting the content of Eu, enhanced piezoelectricity and improved luminescent property can be achieved in KNN ceramics with bimodal distribution and refined grain size, respectively. The addition of Eu destroys long-range ferroelectric orders, leading to the formation of pseudo-cubic phase and polar nanoregions. First-principles calculations show that Eu substitution affects the local electric/elastic fields and crystal fields, benefiting to the luminescent behavior. We believe that this work can benefit to the development of KNN transparent luminescent ceramics and light-emitting devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(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, 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)
