JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 12
·1-16
·
IF 2.8
Wang Fenglin,Mao Haijun,Chen Xingyu,Li Wei,Liu Zhuofeng,Zhang Weijun,Bai Shuxin
In this work, A -site Nd doped BaTiO 3 ceramics in the form of Ba 1− x Nd 2 x /3 TiO 3 with a wide substitution level range of x = 0–0.2 have been prepared via solid-state reaction method. Powder X-ray diffraction results reveal that Nd is completely incorporated into the BaTiO 3 lattice in all specimens. Further analyses based on Rietveld refinement suggest that tetragonal and pseudo-cubic phases coexist in Ba 1− x Nd 2 x /3 TiO 3 ceramics with x ≤ 0.06, and the amount of tetragonal phase is raised with the increase of x value. When x value is larger than 0.08, only pseudo-cubic is observed. The generated \(V^{\prime\prime}_{{{\text{Ba}}}}\) , \({\text{Nd}}_{{{\text{Ba}}}}^{\cdot }\) and \(V_{{\text{O}}}^{{\cdot \cdot }}\) defects, which are identified by X-ray photoelectron spectra, make the grain size displays a tendency of decrease first mainly due to the pining effect, and then increase ascribed to the accelerate of mass diffuse. By introducing such wide range of substitution level, Ba 1− x Nd 2 x /3 TiO 3 ceramics with colossal dielectric constant ( x = 0.08), temperature-stable dielectric properties ( x = 0.15), especially relaxor behavior ( x = 0.20) noticed for the first time, are, respectively, received, which is closely related to the variation of phases and defects induced by the addition of Nd. This study may provide a special idea to modify BaTiO 3 to satisfy diversified applications by single element with a wide doping range, and could lay the foundation of future works focusing on the various potential applications of Ba 1− x Nd 2 x /3 TiO 3 ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 26
·20981-20991
·
IF 2.779
Yan Gui-wei,Liu Qing-qing,Fang Bi-jun,Chen Zhi-hui
Mg doped (Ba 0.98 Li 0.02 )TiO 3 energy storage ceramics with antiferroelectric-like double hysteresis loops were prepared using solid-state reaction method. XRD patterns indicated that tetragonal phase structure of the pure (Ba 0.98 Li 0.02 )TiO 3 ceramic was destroyed and the orthorhombic phase structure appeared with Mg doping. The ratio of orthorhombic/tetragonal phase increased with Mg content increasing, and the value of polarization was in direct proportion to the ratio of orthorhombic/tetragonal phase. The breakdown strength of (Ba 0.98 Li 0.02 )(Mg x Ti 1− x )O 3 ceramics was improved from 60.97 kV/cm at x = 0 to 103.66 kV/cm at x = 0.04. The optimum energy storage properties of (Ba 0.98 Li 0.02 )(Mg x Ti 1− x )O 3 ceramics were obtained with energy storage density of 0.76 J/cm 3 at 102.5 kV/cm when x = 0.04, which is nearly 2.3 times larger than the pure (Ba 0.98 Li 0.02 )TiO 3 ceramic, and the energy storage efficiency was improved from 64 to 87%.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Nan Ma,Ya Yang
Research of photovoltaic effect has been increased based on ferroelectric materials , generating a series of important discoveries. However, the conventional ferroelectric ceramics usually have low photocurrent values. How to increase the photocurrent of ceramics becomes an important issue to push forward the practical application of these devices. Here, we report the intrinsic properties about the temperature dependence of photocurrent and its relationship with the ferroelectric polarization. The photocurrent of BaTiO 3 ceramics strongly depends on the temperature, which can achieve an enhancement of 121.9～179.6% at low temperature (80–240 K) as compared with that at room temperature. The enhancement of photocurrent is associated with ferro-pyro-phototronic effect, evidencing by the enhanced ferroelectric polarization and the activation of shallow trap levels at low temperature, which can be used for detecting 405 nm light under low temperature. This research provides a potential approach to boost the photocurrent of ferroelectric ceramics and enable the development of a wide range of optoelectronic devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 4
·1261-1273
·
IF 8.8
Li Yang,Tang Ming-Yang,Zhang Zhong-Gang,Li Qi,Li Jing-Lei,Xu Zhuo,Liu Gang,Li Fei
BaTiO 3 ceramics are difficult to withstand high electric fields, so the energy storage density is relatively low, inhabiting their applications for miniaturized and lightweight power electronic devices. To address this issue, we added Sr 0.7 Bi 0.2 TiO 3 (SBT) into BaTiO 3 (BT) to destroy the long-range ferroelectric domains. Ca 2+ was introduced into BT-SBT in the form of CaTiO 3 (CT), which has the effect of inhibiting the movement of A-site defects to reduce dielectric loss and refining the grains to increase the breakdown field strength. In addition, we have increased the density and grain uniformity of ceramics by repeated rolling of the green samples through the viscous polymer processing (VPP), to further increase the breakdown electric field. The BT-SBT-CT ceramics exhibit the high recoverable energy storage density of 4.0 J·cm −3 under electric field of 480 kV·cm −1 . Its recoverable energy storage density varies by less than 8% in the temperature range of 30–150 °C, indicating good temperature stability of the energy storage performance. In this work, the energy storage performance of barium titanate-based ceramics was greatly improved by transforming ferroelectrics into relaxor ferroelectrics and VPP method, which can bring new inspiration for the research of energy storage ceramics. Graphical abstract
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 9
·6215-6223
·
IF 3.5
Ye Lu,Ji Zhang,Xinyi Zhao,Kedong Zhou,Lei He
Dielectric capacitors, which can achieve tremendous power density and ultrafast charge/discharge speed, are crucial components for high power equipment. Yet, the synchronous achievement in high recoverable energy density ( W rec ) and high efficiency ( η ) is a long-term difficulty for dielectric ceramics. Herein, the (0.85 − x )NaNbO 3 –0.15BaTiO 3 – x Bi(Mg 1/3 Ta 2/3 )O 3 (NN–BT– x BMT) relaxor ferroelectric ceramics were proposed and studied. The doping of BMT was conducive to promoting the microstructure and bandgap and improving the dielectric relaxation properties of NN–BT ceramics. Finally, the sample of x = 0.10 presented a high W rec of 5.9 J/cm 3 and a high η of 90% simultaneously. In addition, the sample also exhibited superb charge/discharge performances with large power density ( P D = 137 MW/cm 3 ) and fast charge/discharge speed ( t 0.9 = 39 ns). The above results reveal that the NaNbO 3 -based ceramics could serve as potential alternatives for advanced dielectric capacitors.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SCRIPTA MATERIALIA
·
2019
·
IF 4.539
Baisheng Ma,Yan Zhu,Kewei Wang,Zhenzhong Sun,Dianguang Liu,Gang Shao,Jinling Liu,Yiguang Wang
Flash sintering method was adopted to sinter SiO 2 -coated BaTiO 3 ceramics to lower sintering temperature and shorten sintering time. The microstructure and dielectric property of BaTiO 3 with different amount of SiO 2 coating were studied. Samples can be flash sintered at furnace temperatures lower than conventional sintering temperature. Though the onset flash sintering temperature increased obviously with increasing SiO 2 content, the estimated sample temperatures were found close to each other. Samples with improved density was achieved with higher SiO 2 content, but their dielectric constant decreased. Flash sintered samples with 1.5 wt% SiO 2 addition possess a fair dielectric constant with improved density.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoxiao Zhou,Xiaoyan Peng,Haoyu Xu,Yijin Hao,Hezhang Li,Bo-ping Zhang
BiFeO 3 -BaTiO 3 (BF-BT) ceramics are an excellent choice for high-temperature lead-free piezoelectric ceramic due to their high Curie temperature and good piezoelectric properties , but the volatilization of Bi leads to the formation of A-site cationic vacancies and oxygen vacancies , culminating in heightened leakage currents and detrimental effects on piezoelectric properties. In this study, a chemical composition of 0.70Bi (1+ x ) Fe 0·97 Al 0·03 O 3 -0.30BaTiO 3 ceramics, abbreviated as B 1+ x FA-BT, where 0 ≤ x ≤ 0.05, were synthesized, with special attention on the effects of Bi compensation and poling process on their insulation and piezoelectric properties. Due to the coexistence of R - PC phases and low leakage current, B 1+ x FA-BT ceramics exhibit excellent piezoelectric properties and high Curie temperature, among which the B 1.02 FA-BT ceramic boasts optimal overall properties: d 33 = 196 pC N −1 , T C = 480 °C, k p = 34%, θ max = 49.5° and Q m = 32, under optimal poling parameters E p = 50 kV cm −1 and T p = 100 °C. The poling process is directly linked to the reorientation of domains, the redistribution of positive/negative space charge and the aggregation or injection of holes, which is achieved by tuning the poling field and temperature in a ceramic with optimal integrated piezoelectric properties. The poling process of BF-BT ceramics is significantly influenced by their leakage characteristics, which can have a significant impact on their overall performance. Optimizing electrical poling conditions and minimizing leakage current is crucial to achieving favorable piezoelectric properties in BF-BT ceramics with R - PC coexisting structures.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyu Chen,Ruiqi He,Jiacheng Guo,Lu Ye,Xi Chen,Changning Ran,Xinrui Yan,Jianjun Zhang,Sude Ma
(1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ( x = 0.00, 0.06, 0.12, 0.20,molar ratio) ceramics were prepared by solid sintering method. The effects of Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 (BMZT) doping on microstructure, dielectric, ferroelectric and energy storage properties of BaTiO 3 (BTO) were studied. With BMZT addition, the sintering temperature gradually decreases, the grain size reaches a minimum at x = 0.12 and the phase structure changes from tetragonal to cubic. And dielectric properties changed from temperature-dependent to temperature-insensitive. Additionally, higher cubic phase content induced slim polarization and electric field (P-E) loop and low remnant polarization (P r ). Therefore, 0.88 BaTiO 3 - 0.12 Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics achieved recoverable energy storage density (W rec ) of 702.7 mJ/cm 3 and high energy efficiency of 87.3 % under electric field of 93 kV/cm. It exhibited optimum properties, including a minimum grain size (0.620 μm), superior dielectric properties (ε r = 1811.3, tanδ = 0.0552 at 1150 °C), a high maximum polarization strength (14.3 μC/cm 2 ), and the maximum dielectric breakdown strength (93 kV/cm), as identified in the present study. It simultaneously maintains high energy storage density and efficiency over a wide electric field range and large temperature range (room temperature - 90 °C). Thus (1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics are a promising material for energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Chenjie Fu,Nan Chen,Guoping Du
Effects of Ni 2+ doping at A and B sites of BaTiO 3 ceramics on the crystal structures, microstructures, chemical bonding characteristics and dielectric and ferroelectric properties were studied. Both the A-site doped Ba 1−x Ni x TiO 3 and B-site doped BaTi 1−x Ni x O 3 ceramics ( x = 0, 0.01, 0.03, 0.05, 0.08 and 0.10) were prepared using the solid state reaction method at 1300 °C. For Ni 2+ doping at A sites, no change in the crystal structure of Ba 1−x Ni x TiO 3 was observed. The Ba 1−x Ni x TiO 3 ceramics remained to be of tetragonal structure, but their tetragonality consistently decreased with x . For Ni 2+ doping at B sites, a change in the crystal structure from tetragonal to hexagonal was observed for the BaTi 1−x Ni x O 3 ceramics. The hexagonal structure started to appear when x = 0.03, and BaTi 1−x Ni x O 3 ceramics completely transformed from tetragonal to hexagonal structure when x =0.08. Ni 2+ doping introduced more oxygen vacancies to Ba 1−x Ni x TiO 3 and BaTi 1−x Ni x O 3 , and the latter had higher concentration of oxygen vacancies. It was found that Ni 2+ doping, either at A or B sites, strongly decreased their dielectric and ferroelectric properties. The Ba 1−x Ni x TiO 3 ceramics remained to be ferroelectric for x up to 0.10, although it was weak, while the BaTi 1−x Ni x O 3 ceramics became paraelectric when x = 0.03. The Ba 1−x Ni x TiO 3 ceramics exhibited higher dielectric constant than the BaTi 1−x Ni x O 3 .
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 3
·1688-1699
·
IF 1.8
Xiangtai Guo,Yu Sun,Liangliang Liu,Zilong Yu,Juan Liu
BiFeO 3 -BaTiO 3 -based ceramics are promising multiferroic materials for a wide range of applications. In this paper, the effects of different ionic valence state((Ga 0.5 Ta 0.5 ) 4+ , Ta 5+ ) doping on the structure and properties of 0.73BiFeO 3 -0.27BaTi 1- y (Ga 1- x Ta x ) y O 3 ceramics were investigated. X-ray diffraction analysis showed that all samples were determined by rhombohedral R3c phase and tetragonal P4mm phase. A frequency-independent dielectric anomaly with obvious thermal hysteresis was detected in all samples, indicating the first-order ferroelectric phase transition, and the Curie temperatures were all above 600°C. The ferroelectric analysis found that the doping of donor element Ta reduced the coercive field, with a slight decrease of remanent polarization, which can be attributed to the soft effect of Ta element. Meanwhile, the magnetic properties were enhanced for all samples, with a maximum in 15T ( x = 1, y = .015) sample, where M r = .13 emu/g. According to relevant analysis, high-valence element substitution can enhance the magnetic properties and reduce the coercive field of BiFeO 3 , while low-valence element substitution can reduce dielectric loss. This result points out a way for us to choose appropriate doping elements to improve the performance of BiFeO 3 ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-12
·
IF 2.8
Xie Le-Tian,Zhou Xiao-Xiao,Tang Yu-Cheng,Yin Yang,Hao Yijin,Pei Jun,Zhang Bo-Ping
With the increasing demand for portable electronics, power electronics and other devices, energy storage materials with high power density and large energy storage density are becoming more and more important. BiFeO 3 -BaTiO 3 lead-free ferroelectric ceramics are deemed as a potential lead-free energy storage material due to their high spontaneous polarization and high Curie temperature. However, high remanent polarization has become a serious obstacle to its practical application. In this work, 0.67Bi (1- x ) Sm x FeO 3 -0.33BaTiO 3 (BS x F-BT, 0 ≤ x ≤ 0.10) was prepared by the conventional solid phase sintering method. The phase transforms from rhombohedral to pseudocubic, and the dielectric and electrical data reveal that relaxor ferroelectrics are favorable for achieving the small size polar nanoregions and enhanced relaxation behavior. Due to enhanced relaxation behavior by doping Sm 3+ , the recoverable energy storage density ( W rec ) reaches 1.99 J/cm 3 , and the energy storage efficiency ( η ) is 57% at a low electric field (190 kV/cm), which is higher than the undoped ceramic ( W rec = 0.272 J/cm 3 and η = 26%). This work also puts forward the concept of Ergodic relaxor ferroelectrics and Non-ergodic relaxor ferroelectrics to explain the improvement of energy storage performance.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhiqiang Li,Shiguang Yan,Jiake Xia,Fei Cao,Xuefeng Chen,YunXiong Song,Yonghong Chen,Zhi-Sheng Lin,Genshui Wang
With the increasing demand for the miniaturization, high capacitance and high reliability of the Multilayer Ceramic Capacitor (MLCC), the thickness of single dielectric layer is less than 1 μm and the original partical size of the powder has reached the scale less than 300 nm. In this paper, BaTiO 3 powder of various partical sizes (150–500 nm) was modified with Dy and Ho through a chemical coating method. The dense and uniform ceramics in accordance with EIA X7R-type temperature stability were sintered under low oxygen partial pressure and good dielectric properties of dielectric constant >2000 and dielectric loss <1% were obtained. The grain size effect on the dielectric properties under various dc-bias field were systematically investigated. It is found that the fine-grain ceramic exhibits a lower absolute change of the dielectric constant and a higher dc-bias stability. Furthermore, the modified 150 nm BaTiO 3 powders was made into 1210-type MLCCs, and the dielectric behavior of the MLCCs with different dc-fields and ac-fields were study over −55 °C–125 °C. It is found that the ac electric field had a greater influence on the dielectric properties at room temperature and below, and the dielectric constant variation under a dc-bias field was also greatly advanced for the modified fine-grain MLCCs. The results provide a reference for the design of the next generation of BME-MLCCs.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）