CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hsin Wang,Hua Hao,Dongxu Li,Huihuang Xu,Qinghu Guo,Minghe Cao,Zhonghua Yao,Hanxing Liu
Lead-free thin film capacitors with high energy density and efficiency are promising candidates for pulse power systems in advanced electronic industries due to their low cost, lightweight, and integration development. In this study, 0.6Bi 0.5 Na 0.5 TiO 3 -0.4Sr 0.7 Bi 0.2 TiO 3 + x mol Mn (BNT-SBT- x Mn) thin films are fabricated on Pt/Ti/SiO 2 /Si substrates via sol-gel method. The BNT-SBT- x Mn films with perovskite phase possess uniform grain size, well density, and low roughness. The introduction of Mn ions compensates for valence unbalances of A-site vacancy of BNT-based films and forms defective dipoles. Their synergism hinders the transmission of carriers, reduces the leakage current density, and improves polarization and breakdown behavior. Therefore, the BNT-SBT-2% Mn film achieves a high recoverable energy density of 85.35 J/cm 3 together with an enhanced energy efficiency of 73.17% under an electric field of 3114 kV/cm. Meanwhile, the BNT-SBT-2% Mn film displays a good frequency (10 Hz-2k Hz), temperature (20–200 °C), and fatigue (1-10 5 cycles) stability in electrical energy storage properties, suggesting that it would be a promising candidate for the advanced power systems.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 28
·11713-11719
·
IF 3.5
Haoran Yu,Jian Guo,Jiajia Wang,Ji Zhang,Shan-Tao Zhang
As the two typical basic binary solid solutions of the relaxor-PbTiO3 family, Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) has been widely investigated, whereas Pb(Ni1/3Nb2/3)O3-PbTiO3 (PNN-PT) has not. Here, 1.5 mol% Sm-doped (1 − x)Pb(Ni1/3Nb2/3)O3–xPbTiO3, (1 − x)PNN–xPT:0.015Sm with x = 0.33–0.39, ceramics have been prepared and the chemical composition-induced evolution of crystal structure, domain, and electrical properties investigated systematically. With increasing PT content, evolution of the rhombohedral–tetragonal structure was observed. A rhombohedral–tetragonal morphotropic phase boundary occurred around x = 0.36–0.37, which showed a peak piezoelectric property with piezoelectric constant d33 = 531 pC N−1 and planar electromechanical coupling factor kp = 0.37 at room temperature. At the same time, the x = 0.36 composition showed improved ferroelectric behavior with remanent polarization Pr = 13.4 μC cm−2 and coercive field Ec = 3.2 kV cm−1. Interestingly, different from its PMN-PT counterpart, there is no temperature-driven phase transition between room temperature and the Curie temperature for (1 − x)PNN–xPT:0.015Sm. These parameters indicated that the PNN-PT system is worthy of more attention and is a promising platform for further development of high-performance piezo/ferroelectric materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Shiyi Zhang,Dongyan Zhang,Yangxi Yan,Maolin Zhang,Zhimin Li,Pangpang Wang,Ri-ichi Murakami
Relaxor ferroelectrics are complex materials with properties that are remarkably different from traditional ferroelectrics, and they have the ability to probe frequency-dependent dielectric susceptibility. However, the empirical laws developed for traditional ferroelectrics also apply to relaxor ferroelectrics. Here we report an abnormally improved dielectricity of the La-doped relaxor ferroelectric 0.4PNN-0.6PHT, which does not linearly vary with the piezoelectric coefficient, as it is expected. A mesoscale mechanism is proposed to explain the origin of the improved dielectric response of 0.4PNN-0.6PHT, in which the alignment of polar nano regions facilitates the polarization response to the external field. This mechanism demonstrates the critical role of polarization fluctuation for the macroscopic properties of 0.4PNN-0.6PHT.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 6
·1-14
·
IF 1.784
Chen Gang,Fan Tao,Yang Hongqi,Fu Chunlin,Gao Rongli,Deng Xiaolin,Wang Zhenhua,Fan Peigeng,Cai Wei
(1 − x )BaTiO 3 – x BiAlO 3 relaxor ferroelectric ceramics were prepared by the conventional sintering (CS) and the microwave sintering (MWS) methods, respectively. The microstructure, the dielectric properties, the relaxation characteristic, the ferroelectric and the energy storage properties were investigated in detail. The results show that a single perovskite phase exists in ceramic samples sintered by CS and MWS. The addition of BiAlO 3 into BaTiO 3 and the MWS method result in the reduction of the grain size and the porosity of BaTiO 3 ceramic. This leads to the enhanced diffuse transition and frequency dispersion. The dielectric constant and loss decrease with increasing the BiAlO 3 content, and the temperature and the frequency stabilities are enhanced by introducing BiAlO 3 into BaTiO 3 . The remnant polarization ( P r ) increases initially and then decreases with the increase of BiAlO 3 content, the maximum values of P r (9.5 μC/cm 2 for CS and 7.27 μC/cm 2 for MWS) are obtained at x = 0.02. The addition of BiAlO 3 can elevate the variation of polarization Δ P ( P max − P r ), its maximum values (12.56 μC/cm 2 for CS ceramic and 12.2 μC/cm 2 for MWS ceramic) are acquired at x = 0.04, 0.08, respectively. The energy storage properties indicate that the energy storage density ( W rec ) increases, while the energy storage efficiency ( η ) firstly decreases and then increases with the increase of x .
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 ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jia Liu,Cuiying Ma,Xing Zhao,Ke Ren,Ruiying Zhang,Furong Shang,Huiling Du,Yiguang Wang
High-entropy (1− x )Bi 0.5 Na 0.5 K 0.5 Ba 0.5 Ca 0.5 TiO 3 - x BaTiO 3 (BNKBCT-BT, x = 0.02, 0.06, 0.10, 0.14 and 0.20) ceramics are successfully prepared via the solid-state reaction method. The XRD and Raman analyses reveal that all samples exhibit a pseudo-cubic phase structure. With increasing x , the a is gradually increased, resulting in the expansion of unit cell volume. A strong frequency dispersion appeared around T m , demonstrating that the as-prepared ceramics is a relaxor ferroelectric . Owing to the increase in the degree of lattice disorder, as well as relaxation and thermal evolution of PUs, the as-prepared ceramics exhibit a broad relaxor behavior. The Δ P is effectively increased by doping BT, which is conducive to achieving excellent energy storage properties. Moreover, W rec of all samples is more than 1.31 J/cm 3 and, at x = 0.20, W rec reaches the maximum value of 2.24 J/cm 3 at 140 kV/cm. These results indicate that high-entropy (1− x )BNKBCT- x BT ceramics are promising materials for energy storage applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 16
·21164-21177
·
IF 2.478
Liu Jikang,Ding Yuqing,Li Chongyang,Bai Wangfeng,Zheng Peng,Zhang Jingji,Zhai Jiwei
Although high-applied electric field can usually generate high energy storage performance (ESP) for most dielectric materials, the presence of high risk at high electric field and large cost of insulation technology are the main obstacles that critically restrict the actual applications of dielectric ceramics in the energy storage area. Herein, simultaneously realizing high energy storage density ( W rec )/efficiency ( η ) and charge–discharge performance under low working electric fields is proposed in relaxor ferroelectrics via combining the non-ergodic and ergodic relaxor state (NR-ER) and dominated ER features. Based on this idea, a high W rec (2.03 J/cm 3 ) and favorable η (72%), together with excellent frequency dependence (0.5–100 Hz), moderate temperature stability (20–140 °C, and satisfactory fatigue endurance (10 0 –10 5 cycles), can be simultaneously achieved in 0.3[0.955(Bi 0.5 Na 0.5 )TiO 3 –0.045Ba(Al 0.5 Ta 0.5 )O 3 ]–0.7Sr 0.3 (Bi 0.7 Na 0.67 Li 0.03 ) 0.5 TiO 3 (BNT–BAT–0.7SBNLT) ceramic at a low electric field of 200 kV/cm. Moreover, the indicated ceramics also possess great charge–discharge performance at 140 kV/cm, featured by a large power density P D of 46.2 MW/cm 3 , discharge energy density W d of 0.62 J/cm 3 , fast charge-discharge rate t 0.9 of 210 ns, and excellent cycling reliability. Thus, the designed BNT–BAT–0.7SBNLT ceramic possesses superior comprehensive ESP under low electric field, which has broad prospects in practical high-power ceramic capacitors applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2022
·
IF 0
Xudong Qi,Kai Li,Lang Bian,Enwei Sun,Limei Zheng,Rui Zhang
Relaxor-based ternary Pb( In 1 / 2 Nb 1 / 2 )O 3 –Pb( Mg 1 / 3 Nb 2 / 3 )O 3 –PbTiO 3 (PIN–PMN–PT) single crystals and ceramics are promising candidates for high-performance electromechanical conversion devices. It is known that the domain structure and dielectric diffusion–relaxation characteristics are crucial to the excellent performances of relaxor ferroelectrics. In this work, we prepared the PIN–PMN–PT ceramics with various PIN/PMN proportions and systematically investigated their domain structure and dielectric diffusion–relaxation properties. The effect of PIN/PMN proportion on the domain size and dielectric diffusion–relaxation characteristics was also studied. The investigations showed that PIN–PMN–PT ceramics presented multi-type domain patterns comprising irregular island domains and regular lamellar domains. Moreover, the dependent relations of PIN/PMN proportions on the dielectric diffusion and domain size indicated that the PIN composition has a stronger lattice distortion than PMN composition; increasing the PIN proportion can enhance the dielectric diffusion and decrease the domain size. Our results could deepen the understanding of structure–property relationships of multicomponent relaxor ferroelectrics and guide the design and exploration of new high-performance ferroelectric materials.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
Crystals
·
2024
·Vol. 14
·期 1
·91
·
IF 2.4
Fan Zhang,Hua Hao,Minghe Cao,Zhonghua Yao,Shuai Fu,Hanxing Liu
Piezoelectric ceramics with excellent piezoelectric properties and a high Curie temperature are important for numerous electromechanical devices in a broad range of temperature environments. In this work, the relaxor ferroelectric Pb(Yb1/2Nb1/2)O3end member was selected to be introduced into a BiScO3-PbTiO3high-temperature piezoelectric ceramic to reduce the dielectric loss and improve the piezoelectric properties while slightly reducing the Curie temperature. The phase structure and dielectric, ferroelectric and piezoelectric properties of 0.025Pb(Yb1/2Nb1/2)O3-(0.975−x)BiScO3-xPbTiO3(0.60 ≤x≤ 0.63) ceramics were systematically analyzed, and the best electrical properties were observed in the morphotropic phase boundary regionx= 0.61 withd33= 370 pC/N,kp= 44%,Pr= 33.9 μC/cm2. Importantly, no significant depolarization was observed in thex= 0.61 ceramic from room temperature to 290 °C, demonstrating its good thermal stability and potential applications in a wide range of temperature environments.
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 17
·1-10
·
IF 2.8
Gong Qinglin,Hu Ming
Bi(Mg 0.5 Hf 0.5 )O 3 (BMH) has been frequently exploited to engineer the material’s phase structure, micromorphology, dielectric, piezoelectric, and energy storage performance of BaTiO 3 (BT)-based ceramics for the optimization of multifunctional dielectrics. Herein, combined with the Ba(Ti 0.8 Sn 0.2 )O 3 relaxor, (1 – x )Ba(Ti 0.8 Sn 0.2 )O 3 – x Bi(Mg 0.5 Hf 0.5 )O 3 (BTS- x BMH) ceramic samples were prepared through a solid-state reaction process. The micromorphology, dielectric properties, ferroelectric properties, and energy storage performance of BTS- x BMH ceramics were engineered by increasing BMH content. The addition of BMH can refine the grain size, increase the relaxation degree, raise the breakdown strength, and facilitate the production of the polar nanoregions in the BTS- x BMH ceramics. Compared to pure BTS, the energy efficiency of BTS-BMH is remarkably enhanced, which originates from the disruption of the ferroelectric long-range order owing to the BMH modification. At the maximum applied field of 100 kV/cm, the largest energy density of W rec = 0.3 J/cm 3 was realized at the composition of x = 0.05. The highest energy efficiency of η = 99% was acquired for x = 0.15 at 110 kV/cm. Moreover, the energy efficiency for x = 0.15 displays good temperature stability. These findings can guide the further optimization design of environmentally friendly BT-based ceramic capacitors for energy storage applications.
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
Yiwen Niu,Fan Zhang,Zhiqiang Zhang,Xue Zhang,Zhan Jie Wang
Perovskite high-entropy ceramics (HECs) are favorable for energy storage performance due to the novel high-entropy effects. However, highly disordered states of HECs with equal molar ratio at the same site greatly reduce polarization intensity, yielding unsatisfactory energy storage properties. Herein, non-equiatomic [((Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 ) 0.65 (Sr 0.5 Ca 0.5 ) 0.35 ](Ti 0.95 Me 0.05 )O 3 (Me = Zr (Zr 0.5 Hf 0.5 ), (Zr 1/3 Hf 1/3 Sn 1/3 ), abbreviated as BNBSCT-Zr, BNBSCT-ZrHf, BNBSCT-ZrHfSn), HECs have been designed and prepared by a hydrothermal method. As-prepared HECs exhibit high maximum polarization, which are related to the morphotropic phase boundary (MPB) induced by the (Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 composition. In addition, the A-site doping of Sr and Ca and B-site doping of Zr, (Zr 0.5 Hf 0.5 ), and (Zr 1/3 Hf 1/3 Sn 1/3 ) rooted in high configuration entropy improves the degree of dielectric relaxation, decreases the grain size, increases the resistivity, and enlarges the band gap, resulting in a higher breakdown electric field. As a result, BNBSCT-ZrHfSn ceramics exhibit the significant energy storage properties with a high W rec (6.44 J/cm 3 ) and η (73.8 %) under a large E b (477 kV/cm), as well as good temperature, frequency, and fatigue stability. The results show that the "entropy engineering + MPB" strategy provided in this study can remarkablely develop the energy storage properties of dielectric ceramics.
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
·
2021
·
IF 4.527
Enpei Cai,Qibin Liu,Huaizhang Gu
(Ga 0.5 Li 0.5 )ZrO 3 doped lead-free piezoceramics (Ba 0.93 Ca 0.07 )(Sn 0.08 Ti 0.92 )O 3 {which was abbreviated as (1- x )BCST- x GLZ} were fabricated via traditional solid-state method. Microstructures and electrical properties of all samples were studied in detail using XRD , SEM, TEM, piezoelectric response, dielectric temperature spectrum, and ferroelectric hysteresis loop. Based on the experimental results, all the as-prepared samples possessed pure ABO 3 perovskite structure. Single tetragonal (T) phase was obtained at x = 0 and 0.5 mol %, but the coexistence of orthorhombic-tetragonal (O-T) phase constructing MPB was obtained at 0.1 ≤ x ≤ 0.4 mol %. There was an initial increase in the grain size, which subsequently decreased. However, there was an initial reduction in the point defects ( i.e. , vacancies and pores, etc. ), which then increased. The specimen possessed nanoscale lamellar domains and monocrystal structure at 0.2 mol %. All samples acquired good electrical property, especially for the sample at 0.2 mol %. It was confirmed that all specimens were relaxor ferroelectrics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 17
·14273-14282
·
IF 3.289
Longwen Wu,Xiaohui Wang,Longtu Li
Lead-free (1 − x)BaTiO3–xBi(Zn2/3Nb1/3)O3 (x = 0.05–0.20) materials were fabricated via solid-state reactions. A pure perovskite pseudocubic structure is obtained for all compositions. Dielectric measurements reveal an intensified diffusion and relaxor-like characteristics from 5 mol% to 20 mol% Bi(Zn2/3Nb1/3)O3. Weakly coupled relaxor behavior is concluded from the exceptionally high activation energies of ∼0.20–0.22 eV from the Vogel–Fulcher model for x ≥ 0.10, which possibly results in the extremely low dielectric nonlinearity and extra slim polarization–electric field loops. An optimal discharged energy density of 0.79 J cm−3 with a high energy efficiency of 93.5% is achieved at 131 kV cm−1 for x = 0.15, which proves that the BaTiO3–Bi(Zn2/3Nb1/3)O3 material is a promising candidate for high energy storage applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）