Article
Chemistry, Physical
Seok-Mo Kang, Tae Wan Kim, Nam-Hoon Kim, Sung-Jin Kim, Jung-Hyuk Koh
Summary: The composition of lead-free piezoelectric ceramics (1 - x)(Bi0.5Na0.5)TiO3-x(Ba0.5Sr0.5)TiO3 with excellent piezoelectric properties was investigated in this study. Crystal analysis, electrical and piezoelectric properties were analyzed based on the content of BST composition. It was found that the optimal composition was 0.12 BST, which exhibited a phase change from rhombohedral to tetragonal structure, the highest permittivity, and the highest values of P-r, d(33), k(p), and Curie temperature (T-m). These results confirm that 0.12 BST is the optimal composition for (1 - x)BNT-xBST piezoelectric ceramics.
Article
Engineering, Electrical & Electronic
Guoping Deng, Hua Hao, Zhonghua Yao, Minghe Cao, Hanxing Liu
Summary: In this study, (Ba, Sr)TiO3 nanopowders were prepared using the oxalate co-precipitation method and used to fabricate composites with Ba-B-Al-Si glass and (Ba, Sr)TiO3 ceramic. It was found that the sintering temperature and dielectric constant decreased with increasing glass content, while the breakdown strength increased and then decreased. The effect of different alkali-free glass additions on the sintering temperature and dielectric properties of (Ba, Sr)TiO3 was also studied, and it was found that the composite with 13.5 vol.% Ba-B-Zn glass phase showed optimal electrical properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
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
Green & Sustainable Science & Technology
Wei Wang, Xin-Gui Tang, Yan-Ping Jiang, Qiu-Xiang Liu, Wen-Hua Li, Xiao-Bin Guo, Zhen-Hua Tang
Summary: In this study, BSO-modified relaxor ferroelectric ceramics were extensively characterized, and it was found that they exhibit outstanding energy storage performances, including high polarization intensity, high energy density, and high efficiency. Moreover, the addition of BSO enhances the stability and frequency-insensitivity of the materials.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Review
Materials Science, Multidisciplinary
Feng Gao, Kena Zhang, Yiting Guo, Jie Xu, Mikolaj Szafran
Summary: This paper reviews recent developments and challenges of (Ba,Sr)TiO3/polymer functional composites, emphasizing the influence of microstructure and interface nature on dielectric properties, as well as discussing factors and theoretical models related to dielectric properties.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Md Abu Mosa, M. K. Das, F. Alam, M. N. Khan, S. C. Mazumdar
Summary: The role of co-doping with Ba and Sm in BiFeO3 has been studied, and it is found that co-doped samples have improved dielectric and electric polarization properties. Sm doping notably increases the real part of initial permeability and relative quality factor, as well as the coercivity of Bi0.85Ba0.15FeO3 ceramics. This study is of great importance for the fabrication of magnetoelectric devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Energy & Fuels
Fanbo Zhang, Zhonghua Dai, Yu Pan, Guoshuai Chen, Jingjing Liu, Weiguo Liu, Tomoaki Karaki
Summary: With the rapid development of the electronic industry, there is a growing demand for ceramic materials with excellent energy storage performance. This study proposes a combined design strategy to introduce polar nano regions and reduce grain size, resulting in high energy storage properties and stability in the ceramics.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Catherine Zhou, Gregory S. Rohrer, Paul A. Salvador
Summary: Density functional theory (DFT) was used to calculate thermodynamic parameters related to epitaxial polytypes during nucleation of (Sr/Ba)MnO3 on (100), (110), and (111) cubic (Sr/Ba)TiO3 substrates. The results showed that 3 ������ SrMnO3 becomes less stable when moving from (100) to (110) to (111) orientations, consistent with experimental observations. The study also discussed the different thermodynamic contributions to polytype stability and assessed the feasibility of stabilizing a 3 ������ BaMnO3 film on (Sr/Ba)TiO3 substrates using DFT results.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Multidisciplinary Sciences
Asad Ali, Sarir Uddin, Madan Lal, Abid Zaman, Zafar Iqbal, Khaled Althubeiti
Summary: Sn-doped BaTi4O9 (BT4) dielectric ceramics were prepared using a mixed oxide route, showing orthorhombic symmetry in XRD analysis. SEM revealed that grain size decreased with increased Sn4+ content. FTIR spectroscopy confirmed the presence of metal oxide groups, while photoluminescence spectra showed red color emission. Microwave dielectric properties of the ceramics exhibited high dielectric constant, quality factor, and low dielectric loss.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Environmental
Wei Huang, Ying Chen, Xin Li, Genshui Wang, Jiake Xia, Xianlin Dong
Summary: In this study, a core-shell microstructure dielectric ceramic was investigated to improve the energy storage density by enhancing the electric breakdown strength and effective dielectric constant. The experimental results demonstrated that the prepared ceramic exhibited an ultrahigh recoverable energy density and superior energy storage efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
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, Multidisciplinary
Seiji Harada, Yuka Takagi, Hajime Nagata, Tadashi Takenaka
Summary: The study found that quenching treatment can significantly increase the depolarization temperature of Cu-doped BNLBT ceramics, without causing significant deterioration of piezoelectric activity.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Imene Saoula, Chahinez Siad, Abdelouhab Ouahab, Nassiba Allag, Abdelouahad Chala, Saad Rahmane, Saida Marmi, Nouari Saheb
Summary: In this study, calcium, strontium, and barium doped SnO2 thin films were synthesized using spray pyrolysis technique. The optical and electrical properties of these films were characterized. Doping with calcium and strontium improved the optical transmittance of SnO2, while barium doping increased its band gap. Calcium and strontium doping also increased the electrical conductivity of SnO2, while barium doping decreased it. The calcium and strontium doped films showed great potential in functional applications.
Article
Materials Science, Ceramics
Senlin Leng, Hao Cheng, Renhui Zhang, Caiyun Gao, Zhicheng Li
Summary: The study prepared La-Mn codoped ceramics for lead-free positive temperature coefficient of resistivity (PTCR) thermistors, with experimental results showing that doping different concentrations of La and Mn can affect the performance of the thermistors. The XRD analysis revealed that the ceramics were composed of pure tetragonal perovskite phase, and the resistivity jump increased significantly with the doping of Mn. The role of grain boundary effect in PTCR performance was also highlighted in the study.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jun Yang, Qiang Xie, Laiyuan Ao, Shengjie Wu, Xueting Zhu, Qinghua Zhong, Yueyang Xu, Zixuan Fang, Xianzhong Tang, Bin Tang
Summary: Novel walstromite-type MCa2Si3O9 (M = Ba, Sr) ceramics with triclinic structure were synthesized. The P-V-L theory revealed that the quality factor of the ceramics is mainly influenced by the lattice energy and bond energy of the Si-O bonds, while the dielectric constant is mainly determined by ionic polarization. BaCa2Si3O9 and SrCa2Si3O9 ceramics exhibited excellent microwave dielectric properties when sintered at 1240/1280 degrees C for 4 h. Among them, SrCa2Si3O9 ceramic showed potential for sub-6 GHz microstrip bandpass filter applications due to its high microwave dielectric properties and low thermal expansion coefficient.
CERAMICS INTERNATIONAL
(2023)
