Article
Materials Science, Ceramics
Kangli Xu, Pan Yang, Wei Peng, Lingxia Li
Summary: A series of Pb-free dielectric tunable ceramics based on (Ba1-xCax)( Zr0.18Ti0.82)O-3 were carefully prepared in this work. The BCZT09 ceramics showed high tunability (86.09%) and low dielectric loss (-0.19% @7.42 kV/cm) at 1 kHz. The temperature stability of dielectric tunable performance was improved with Ca2+ incorporation, with BCZT09 showing advantages in a temperature range of -20 degrees C to 85 degrees C. These observations suggest BCZT09 as a promising matrix for application in dielectric tunable devices operating at room temperature.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Asad Ali, Sarir Uddin, Zafar Iqbal, Madan Lal, Muhammad Hasnain Jameel, Abid Zaman, Abid Ahmad, Waqas Khan
Summary: Research on Ca2+ substituted barium titanate materials with improved dielectric properties and reduced energy losses shows promise for manufacturing energy storage devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Gang Liu, Wenzi Yu, Ying Wang, Haoren Feng, Minghui Hao, Guanghua Wu, Quan Li, Kun Yu, Baoyan Fan, Li Jin, Chunlin Song, Yan Yan
Summary: In this paper, Sr2+ and Hf4+ are doped into BaTiO3 to construct a multicritical point, improving the adiabatic temperature change and broadening the working temperature span. The (Ba0.9Sr0.1)(Hf0.1Ti0.9)O3 ceramic shows the most excellent comprehensive electrocaloric performance and has the potential as a lead-free bulk ceramic material for EC refrigeration applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Don Biswas, Prolay Sharma, N. S. Panwar
Summary: Ceramic pellets of (Ba1-xCax)(Zr1-yTiy)O-3 were prepared using solid-state reaction method followed by double sintering. The dielectric properties and high temperature X-ray diffraction measurements showed a structural anomaly around 100 degrees C, with the sample exhibiting tetragonal phase below 100 degrees C and cubic phase above 100 degrees C.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Shanshan Zhang, Bijun Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding
Summary: Lead-free ceramics (Ba1-xCax)(0.995)Eu-0.005](Ti1-yHfy)O-3 (B1-xCxT1-yHy-Eu) were fabricated by conventional solid-state method, with the effects of sintering temperature and cation ratios on electrical and fluorescent properties investigated. The ceramics exhibited enhanced ferroelectric and piezoelectric properties attributed to Eu doping, with extremum piezo-luminescence figure of merit appearing in the sintered ceramics. High-temperature conductance mechanism was attributed to oxygen vacancies produced during sintering process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Roman Indergand, Xavier Bruant, Dennis M. Kochmann
Summary: In this study, high-resolution simulations and a phase-field model were used to analyze the ferroelectric domain evolution in PZT and its impact on material properties. By automatically identifying and tracking different types of domain walls, their role in polarization reversal process was studied. The results reveal correlations between the density and width of domain walls and macroscopic piezo- and dielectric material properties. Furthermore, correlations between the average polarization and strain within a grain and its crystallographic orientation were observed, in agreement with experimental results.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Ceramics
Zejia Yang, Jian Fu, Yudong Xu, Ruzhong Zuo
Summary: Lead-free (BaxCTZ) ceramics exhibit a field insensitive giant dynamic piezoelectric response with a high strain value, attributed to the chemical modulated O-T PPB and field induced partially irreversible T-O phase transition. These compositions show great potential for applications in lead-free actuator piezoceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Young Soo Lim, Subramanian Sasikumar, Hae Won Lee, Min Ho Jang
Summary: By investigating the effects of Ca doping into A-site on the properties of BCTS ceramics, we found that Ca incorporation can enhance the ferroelectricity of BCTS ceramics, but at the same time, it leads to a diffuse phase transition in the ceramics.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Rajasekhar Bhimireddi, Sai Pavan Prashanth Sadhu, Lokeswararao Dhavala, Tukaram Shet, Swarup Kundu, Anees A. Ansari, M. Aslam Manthrammel, S. AlFaify
Summary: Lead free piezoelectric ceramics were synthesized using pre-reacted powders of Sr2Bi4Ti5O18 (SBT) and [(K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O-3] (KNLNST). The study confirmed that KNLNST could be dissolved in SBT phase with a maximum solubility of less than 0.15 mol. Scanning electron microscope observations showed an increase in grain size and plate-like morphology with increasing x. The samples with x = 0.2 exhibited superior relative permittivity, dielectric loss, and maximum polarization compared to undoped SBT. The temperature dependent dielectric measurements confirmed a decrease in Curie temperature with increasing x.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
T. Badapanda, B. Parija, R. Barman, S. Chaterjee
Summary: This paper presents experimental studies on the structural, dielectric, ferroelectric, piezoelectric, and electromechanical parameters of BZT ceramics prepared using the conventional solid state technique. The results indicate that BZT ceramics have the potential to be environmentally friendly sensor and actuator devices with high performance.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Weishuang Fang, Junqi Chen, Yang Yang, Laiyuan Ao, Ying Tang, Jie Li, Liang Fang
Summary: Orthorhombic and tetragonal phase CaLaGaO4 ceramics were synthesized using a conventional solid-state method in this study. The crystal structure and phase evolution were investigated, and it was found that different phases coexisted at certain sintering temperature ranges, leading to variations in microwave dielectric properties. Theoretical permittivity calculations based on specific equations provided insights into accurate estimation of properties in low-symmetry-structure ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ming Yin, Zhen-Jie Wang, Peng Li, Ji-Gong Hao, Wei Li, Juan Du, Guo-Rong Li, Chun-Ming Wang, Peng Fu
Summary: The xLu(2)O(3)-(1-x)Ba0.98Ca0.02Ti0.96Sn0.04O3 ceramics were synthesized by a solid-phase reaction method and exhibited perovskite structures with orthorhombic-tetragonal coexisting phases. The grain sizes became more uniform with increasing Lu2O3 contents, leading to an increase in the piezoelectric coefficient d(33) which reached a peak value at x = 0.0050. This peak value of d(33) was reported to be significantly higher than that of pure BCTS ceramics.
Article
Chemistry, Physical
Mankang Zhu, Xiaofen Yan, Qiumei Wei, Mupeng Zheng, Yudong Hou, Xiaoxing Ke, Yang Bai
Summary: A new tetragonal ceramic structure was designed by adding BMT, achieving a large electrocaloric effect and a high ΔT/ΔE value. The high electrocaloric effect is attributed to the coexisting P4bm and P4mm symmetries in the microstructure of the sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Rui Hu Mi, Bu Hang Chen, Xiao Li Zhu, Xiang Ming Chen
Summary: Ba(Ti0.25Zr0.25Hf0.25Sn0.25)O3 high-entropy ceramics were prepared and their dielectric and ferroelectric characteristics in association with the structures were investigated. The ceramics showed a single-phase perovskite structure as confirmed by X-ray diffraction and energy dispersive spectroscopy analysis. The materials exhibited a broad dielectric peak with strong frequency dispersion, indicating a relaxor nature due to nanoscale ferroelectric domain structures. The homogeneous microstructure contributed to reduced leakage current density and significantly improved dielectric strength, making these ceramics desirable for practical applications. Compared to similar systems, Ba(Ti1-xZrx)O3 & Ba(Ti1-xSnx)O3, the high-entropy ceramics demonstrated superior relaxor ferroelectric characteristics.
JOURNAL OF MATERIOMICS
(2023)
Article
Engineering, Electrical & Electronic
Mingwei Zhang, Le Xin, Zhaoxing Dong, Yanyu Zhang, Jingjing Jin, Zhengxin Li, Yuze Xue, Luchao Ren, Jiwei Zhai
Summary: The relationship among phase composition, microstructures, and dielectric properties of different ceramic composites was investigated. It was found that increasing the content of Ba1-xSrxCuSi2O6 and Sr2+ gradually suppresses and broadens the dielectric peak of the composites. While introducing Ba1-xSrxCuSi2O6 reduces dielectric permittivity to some extent, dielectric tunability and quality factor remain high.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
