Article
Materials Science, Ceramics
Xiang Niu, Xiaodong Jian, Xianyi Chen, Haoxuan Li, Wei Liang, Yingbang Yao, Tao Tao, Bo Liang, Sheng-Guo Lu
Summary: Doping manganese ions in (BaSr)TiO3 (BST) ceramics can lead to high permittivity and low dielectric losses, improving the performance of the materials. The Ba0.6Sr0.4Mn0.001Ti0.999O3 sample exhibited a maximum electrocaloric effect of 2.75 K in temperature change at approximately 21 degrees C and 50 kV/cm, making it a promising ECE material for practical refrigeration devices operating at room temperature.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Engineering, Electrical & Electronic
Marcin Kacki, Marek S. Rylko, John G. Hayes, Charles R. Sullivan
Summary: Manganese-zinc ferrites are preferred for high-frequency and high-power magnetic components. However, manufacturers' material specifications lack sufficient information for design optimization. This article proposes a method to determine the properties of Mn-Zn ferrite and provides experimental frequency characteristics for four ferrite materials. The impacts of physical size, temperature, and force on ferrite properties are also considered.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Review
Chemistry, Multidisciplinary
Mingyang Yan, Zhida Xiao, Jingjing Ye, Xi Yuan, Zihe Li, Chris Bowen, Yan Zhang, Dou Zhang
Summary: This review discusses the characteristics, fabrication processes, and applications of porous ferroelectric materials.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Physics, Applied
X. Wen, G. Yang, Q. Ma, Y. Tian, X. Liu, D. Xue, Q. Deng, S. Shen
Summary: In this study, compositional gradients were introduced into Ba1-xSrxTiO3 systems to enhance the temperature stability of flexoelectric behavior. The improved stability in graded ceramics results from the engineered sequential Curie temperatures of individual layers and the positive correlation between dielectric constant and flexoelectricity, significantly reducing the drastic variations of flexoelectricity at different temperatures.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Environmental
Yang Li, Yi Liu, Mingyang Tang, Jingwen Lv, Fukang Chen, Quan Li, Yan Yan, Fei Wu, Li Jin, Gang Liu
Summary: A two-step strategy has been proposed in this study to enhance the energy storing performance of lead-free ferroelectric ceramics, which includes adjusting the ratio of chemical elements and optimizing the preparation process, and has been proven to significantly improve the energy storage performance, especially achieving superhigh energy storage density for a new ceramic material under high electric field.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jie Wu, Gaochao Zhao, Chengbing Pan, Kun Tao, Jie Yang, Xuebin Zhu, Peng Tong, Lihua Yin, Wenhai Song, Yuping Sun
Summary: We investigated the effect of A-site disorder on the properties of lead-free Ba1-x-ySrxCayTiO3 perovskites and found that decreasing A-site disorder leads to reduced tetragonal distortion, ferroelectric transition temperature, and the temperature of the maximum electrocaloric effect. By optimizing the A-site disorder, the highest adiabatic temperature change can be achieved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
S. A. Gridnev, I. I. Popov, M. A. Kashirin, A. Bocharov
Summary: By investigating the temperature dependences of internal friction and Young's modulus in ferroelectric ceramics, the effects of different external conditions on the material's performance were observed. The addition of 0.2 mass. % La led to an increase in internal friction and a decrease in the internal friction maximum near the phase transition temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yongbao Cui, Tianxiang Yan, Zhaohui Wang, Haochen Sun, Xiuyun Lei, Shiguang Yan, Liang Fang, Laijun Liu
Summary: In this study, (1-x)K0.5Na0.5NbO3-xLa(Zn0.5Zr0.5)O-3 [(1-x)KNN-xLZZ, x=0.005, 0.010, 0.015, 0.020] ceramics were synthesized for high-temperature ceramic capacitor applications. The influence of LZZ content on phase structure, microstructure morphology, dielectric behavior, and conductivity behavior was investigated. The ceramic with x=0.015 exhibited excellent performance with ultrahigh and stable permittivity and low dielectric loss in a wide temperature range.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
JingJing Yang, ZhaoChen Wang, Hao Feng, YanHui Wei, GuoChang Li, YongCan Zhu, ChunCheng Hao, QingQuan Lei, ShengTao Li
Summary: Silicone rubber is widely used in electric power equipment due to its excellent insulation performance and weather resistance. However, its weak breakdown characteristic limits its application in high-voltage grade power equipment. This paper constructs a nano-modification system of silicone rubber using a binary composite matrix of phenyl-vinyl. The introduction of the benzene ring structure improves the breakdown strength of the matrix, while the use of barium strontium titanate (BST) improves the permittivity of the composite, reducing the electric field shared by silicone rubber.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Zichen He, Minghe Cao, Eugene Furman, Michael T. Lanagan, Hua Hao, Zhonghua Yao, Zhiyong Yu, Hanxing Liu
Summary: The dielectric properties of SrTiO3 ceramics prepared by plasma-activated sintering were investigated. The material exhibited high permittivity and low dielectric loss, with one mode being sensitive to humidity and the other mode showing abnormal slowing down of relaxation rate with increasing temperature.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Dinesh Kumar, Sadhana Yadav, Chandra Bhal Singh, Ram Sagar Yadav, Shyam Bahadur Rai, Akhilesh Kumar Singh
Summary: In this study, single phase Y1-xSrxFeO3 perovskite phosphors with different Sr2+ concentrations were synthesized by using the sol-gel combustion method. The structural characteristics of Y1-xSrxFeO3 perovskites were investigated using X-ray diffraction data and Rietveld structure refinement. The phosphors exhibited an orthorhombic crystal structure with Pnma space group. The average crystallite size decreased but the lattice strain increased with increasing Sr2+ concentration. The phosphors showed blue, yellow, and red emissions under excitation at 350 and 360 nm, and the emitted color was in the bluish-magenta region of the visible spectrum. The Y1-xSrxFeO3 phosphors may have potential applications in capacitors, display devices, and solid-state lighting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chen Zhang, Zixin Zhou, Zhuming Tang, Didier Ballo, Chun Wang, Gang Jian
Summary: The Sc2O3 doped Ba(Zr0.1Ti0.9)O-3 ferroelectric ceramics were investigated for their microstructure, domain structure, dielectric and ferroelectric properties. It was found that Sc2O3 doping decreased the grain size, while both 90 degrees and 180 degrees ferroelectric domains coexisted in the ceramics. The phase transition temperature and dielectric permittivity maximum decreased with increasing Sc2O3 content, but the relative dielectric constant temperature stability was improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Tsang-Tse Fang, Yu-Chi Lu, Hsing- Hsiang
Summary: The correlation between polarization and AC conductivity behavior of polycrystalline non-ferroelectric ceramics is better explained through three zones identified in permittivity and AC conductivity spectra. These zones, related to dielectric and conductivity processes governing the response to an AC field, have been identified using the cluster model within the framework of percolation theory. The colossal dielectric permittivity of non-ferroelectric materials is attributed to the alignment of hopping polarization through developing percolation clusters with high electron concentrations. The physical origin of the correlation between dielectric permittivity and AC conductivity in polycrystalline ceramics, in relation to the grain boundary effect, has been clarified.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Edita Palaimiene, Artyom Plyushch, Jan Macutkevic, Juras Banys, Ewa Talik, Antoni Kania
Summary: The dielectric properties of Ag1-xLixNbO3 (ALNx) ceramics were investigated in a wide frequency range. It was found that the room temperature phase of ALNx ceramics is ferrielectric for lower compositions and ferroelectric for higher compositions. The frequency dependence of dielectric permittivity is mainly affected by the relaxational mode near the phase transition temperature and domain dynamics. The ALNx ceramics exhibit high dielectric permittivity and low dielectric losses, making them attractive for microwave applications. Additionally, the piezoelectric properties of ALNx ceramics were studied, showing the highest piezoelectric coefficient for ALN6 composition. The number of polar modes in the ceramics is influenced by the composition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Katy S. Gerace, Michael T. Lanagan, John C. Mauro
Summary: Understanding the mechanisms contributing to dielectric properties of glasses is critical for designing new compositions for microwave frequency applications. In this work, dielectric permittivity was measured for a series of niobiosilicate glasses with varying compositions. The calculations of polarizability and experimental results reveal that SiO2 polarizability depends on the chemistry and connectivity of the glass, which has important implications for designing glass compositions for microwave frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Tian Wang, Ren-Ci Peng, Wanjun Peng, Guohua Dong, Chao Zhou, Sen Yang, Ziyao Zhou, Ming Liu
Summary: The study focuses on the synthesis of high energy storage density (U) large-sized (111)-oriented BTO/PVDF composites, achieving a remarkable enhancement in U value. Phase-field simulations reveal that the combination of high-resistance PVDF films and high-dielectric BTO films significantly improves breakdown strength.
ADVANCED FUNCTIONAL MATERIALS
(2022)
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
Materials Science, Multidisciplinary
Minxia Fang, Fanghua Tian, Kaiyan Cao, Xiaoqin Ke, Yin Zhang, Sen Yang, Wenliang Zuo, Yao Liu, Tianyu Ma, Xiaoping Song, Yuanchao Ji, Xiaobing Ren
Summary: Magnetic refrigeration technique based on magnetocaloric effect is of interest due to its high energy-converting efficiency and environmental friendliness. In this study, a combination of large |4S| (40 J kg(-1)1K(-1)) and large |4Tad| (15 K) under 5 T around room temperature was achieved in Ni-Mn-In Heusler alloys. The excellent combination occurred near the co-occurrence point of martensitic and ferromagnetic transitions. The magnetocaloric properties can be understood by analyzing the free energy barrier and the temperature range of field induced magnetic transition near the co-occurrence point.
Article
Materials Science, Multidisciplinary
Shuangshuang Zhao, Qianglong Liang, Chuanxin Liang, Dong Wang, Yuanchao Ji, Yu Wang, Yufeng Zheng, Xiangdong Ding, Michale Mills, Xiaobing Ren, Yunzhi Wang
Summary: This study reports the quasi-linear superelasticity with ultralow elastic modulus in TiNi shape memory alloys during tensile cyclic deformation. The suppression of normal martensitic transformation and the appearance of strain glass transition behavior were observed. High-density defects involving twin boundaries and dislocations were found under tensile cyclic deformation. Stabilized B19' nanodomains were also observed after deformation. These deformation defects and stabilized nanodomains have a significant influence on the transition behavior and mechanical property, resulting in the detected quasi-linear superelasticity with ultralow modulus.
ADVANCED ENGINEERING MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Dong Wang, Yuanchao Ji, Xiaobing Ren, Yunzhi Wang
Summary: Strain glass is a new strain state discovered recently in ferroelastic systems, characterized by nanoscale martensitic domains and unique properties such as linear superelasticity and large magnetostriction. This review discusses experimental characterization, theoretical models, unresolved issues, and challenges in strain glass study.
ANNUAL REVIEW OF MATERIALS RESEARCH
(2022)
Article
Physics, Applied
Yangyang Xu, Guomang Shao, Yumei Zhou, Yu Wang, Sen Yang, Xiangdong Ding, Jun Sun, E. K. H. Salje, Turab Lookman, Dezhen Xue
Summary: A ferroelectric phase transition in barium titanate single crystals under an external electric field is observed, showing scale invariant nucleation and growth of complex domain structures. The energy exponent varies with the external bias and cooling history, with the exponent being near 1.68±0.022 for a single-domain sample after field cooling and 1.66 for a multi-domain sample after zero field cooling under high fields. The complex domain patterns in the multi-domain sample hinder the movement of the phase boundary and generate more small energy signals, resulting in a high critical exponent. The aftershock time distribution remains the same for all switching conditions with Omori exponent near -1 and switching time correlations of -1±0.05 for short times and -2±0.10 for long times.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Zhonghua Dai, Shengbin Wang, Yong Liu, Fanbo Zhang, Weiguo Liu, Xin Zhao, Xiangdong Ding, Minxia Fang, Xiaobing Ren
Summary: In this study, by introducing SrSc0.5Nb0.5O3 into (Bi0.5Na0.5Ti0.95Al0.025Nb0.025O3) [(1-x)BNTA-xSSN], a high recoverable energy storage density (W-rec) of about 2.7 J/cm(3) and energy storage efficiency (eta) of approximately 76% at 210 kV/cm were achieved at x=0.1; furthermore, eta was further improved to 85% at x=0.2. The modified .9BNTA-.1SSN showed excellent stability (thermal and frequency stability) at 150 kV/cm, surpassing other lead-free ceramics. The enhanced energy storage performance is attributed to increased relaxation degree and the formation of ferroelectric nanodomains, while the improved E-b is due to increased electrical resistivity and decreased grain size.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Hongji Lin, Shuai Ren, Pengfei Dang, Chunxi Hao, Xuefei Tao, Dezhen Xue, Yu Wang, Hongxiang Zong, Zhenxuan Zhang, Wenqing Ruan, Xiong Liang, Jiang Ma, Xiangdong Ding, Jun Shen
Summary: In this study, a strain glass was found in Ti50-x-yNi50+yNbx due to the synergistic effect of Ni and Nb atoms. The system was led to the strain glass state with the help of 1 at% excess Ni atoms and 2% Nb atoms. A boson-peak-like glassy feature was also observed.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Liqiang He, Yang Yang, Chang Liu, Yuanchao Ji, Xiaojie Lou, Lixue Zhang, Xiaobing Ren
Summary: To achieve efficient and high-density energy storage in electrostatic capacitors, dielectric materials need to exhibit good performance over a wide temperature range. In this study, a crossover composition between antiferroelectric and relaxor antiferroelectric states is found to enable a high polarization change and low hysteresis. This leads to the development of lead-free Ag1-3xLaxNb0.9Ta0.1O3 (x=0.03) ceramics that demonstrate a large recoverable energy storage density (Wrec -8.6 J/cm3) with high efficiency (eta -85%) under 460 kV/cm. The x=0.03 ceramics also show excellent energy storage properties (Wrec > 6.8 J/cm3 with ultrahigh eta -90%) in the temperature range of 20-120 degrees C, thanks to the coexistence of micro- and nano-antiferroelectric domains.
Article
Materials Science, Multidisciplinary
Xiaoqin Ke, Dong Wang, Sen Yang, Xiaobing Ren, Yunzhi Wang
Summary: We report that the single domain generated from the vortex in ferroelectric nanodots will transform back to the vortex structure after removal of the external electric field, providing a large recoverable electrostrain. This recoverable electrostrain maintains a large value and a wide temperature range. The good recoverability is mainly attributed to the dipole-dipole interaction energy and the elastic interaction energy in the system. This work may contribute to the development of miniaturized actuators in MEMS or NEMS.
Article
Physics, Multidisciplinary
Minxia Fang, Yuanchao Ji, Yan Ni, Wenjia Wang, Hengmin Zhang, Xifei Wang, Andong Xiao, Tianyu Ma, Sen Yang, Xiaobing Ren
Summary: In this letter, researchers report a surprising low-temperature toughening phenomenon in a La-doped CaTiO3 perovskite ceramic. The fracture toughness of the ceramic increases by 2.5 times when cooling from above room temperature down to cryogenic temperature, due to the emergence of nanosized orthorhombic ferroelastic domains from the existing tetragonal ferroelastic matrix. This finding may lead to the design of tough ceramics with a wide temperature range and provide insights into reentrant transitions in other ferroic systems.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Applied
Zhiyong Dai, Chao Zhou, Chenyang Guo, Kang Cao, Ruisheng Zhang, Tieyan Chang, Yoshitaka Matsushita, Adil Murtaza, Fanghua Tian, Wenliang Zuo, Yin Zhang, Sen Yang, Xiaoping Song
Summary: This study investigates the enhancement of magnetostriction in FeGa alloys by doping trace amounts of Pt. The results show that aligning the crystal growth direction with the easy magnetization axis and increasing the lattice parameter contribute to the improvement of magnetostriction. This research may accelerate the design of highly magnetostrictive FeGa alloys and other magnetic functional materials.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yuanchao Yang, Yangyang Xu, Yumei Zhou, Xiangdong Ding, Jun Sun, Turab Lookman, Dezhen Xue
Summary: We study the behavior of martensitic transformation by considering the coupling of volumetric strain and transformation strain within a Ginzburg-Landau framework. Nonthermoelastic features, such as large residual strain, large thermal hysteresis, and incomplete transformation gradually appear with increasing coupling strength. The volume change associated with the transformation due to the coupling is identified as the essential physics for the nonthermoelastic features observed in an ideal thermoelastic martensitic transformation. A materials descriptor based on insights from the model is proposed for features associated with a martensitic transformation.
Article
Materials Science, Multidisciplinary
Pengfei Dang, Lei Zhang, Yumei Zhou, Cheng Li, Xiangdong Ding, Jun Sun, Dezhen Xue
Summary: By combining point defect doping and nanostructure, low-temperature shape-memory alloys (SMAs) have been developed with good actuation properties. The doping of Co into the Ti-Ni host alloy hinders the martensitic transformation at lower temperatures. By post-deformation annealing, the partially recrystallized state with dense dislocations and nanoprecipitates is achieved, effectively strengthening the matrix to prevent irreversible strain under large external loads. The Ti49.2Ni44.8Co6 alloy exhibits a recoverable actuation strain of 4.5% at temperatures below -50 degrees C, and its work output of 36 MJ m(-3) surpasses most SMAs, making it promising for low-temperature actuator applications.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chao Zhou, Tieyan Chang, Zhiyong Dai, Yuanliang Chen, Chenyang Guo, Yoshitaka Matsushita, Xiaoqin Ke, Adil Murtaza, Yin Zhang, Fanghua Tian, Wenliang Zuo, Yu-sheng Chen, Sen Yang, Xiaobing Ren
Summary: This paper investigates the nature of phase transitions in TbCo2, a Laves-phase rare-earth-transition metal intermetallic compound. Through experimental evidence and interpretation using Landau theory, it is determined that the transition in TbCo2 is a first-order transition. This study contributes to a deeper understanding of phase transitions in magnetic materials involving both magnetic and structural transitions.
