JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Jie Wu,Gaochao Zhao,Chengbing Pan,Peng Tong,Jie Yang,Xuebin Zhu,Lihua Yin,Wenhai Song,Yuping Sun
We report the structure, dielectric, ferroelectric and piezoelectric properties of Cr-Mn co-doped (1- y )BiFe 1- x Cr x O 3 - y BaTi 1- x Mn x O 3 (0≤ x ≤0.04, 0.2≤ y ≤0.27) ceramics. By varying both x and y , a series of samples near morphotropic phase boundaries exhibiting both high ferroelectric Curie temperature T C (∼580−643 °C) and relatively large piezoelectric constant d 33 are constructed. Especially, the sample with y = 0.24 and x = 0.02 is found to show coexistence of high depolarization temperature T d (∼551 °C) and relatively large d 33 ∼116 pC/N, superior to most of those of BiFeO 3 based high-temperature piezoceramics reported previously. The enhanced ferroelectric T C in the Cr-Mn modified samples can be ascribed to the combined effects of large lattice distortion and high tetragonal phase content. These results demonstrate that constructing morphotropic phase boundaries via considering simultaneously the role of lattice distortion might be effective route to realize high-temperature and high piezoelectricity in BiFeO 3 -based systems.
研究领域:
材料科学
·
电陶瓷
·
铁电材料
·
压电材料
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2023
·
IF 11
Chaochao Sun,Jiaqi Chen,Shuhao Yan,Damei Jiang,Xiangcheng Chu,Songmei Yuan
3D printing piezoelectric ceramic has provided solutions for personalized electronic devices due to the capability of fabricating intricate 3D structures. However, as the ceramic powder size decreases and solid content increases, 3D printing technology encounters limitations due to the high viscosity, long exposure times, and heavy scattering of the ceramic slurry . In this study, a new piezoelectric-pneumatic micro-jet (PPMJ) printing method with a wide viscosity range based on barium titanate (BTO) slurry is proposed. BTO slurry with 100 nm particle size is optimized for homogeneity and printability. The effects of dispersant types on slurry are studied and the optimal concentration of the dispersant is determined. Based on PPMJ printing, BTO slurry of 50 vol % with a viscosity of 383,135mPa·s can be printed with a 0.2 mm diameter printhead nozzle. After post-processing, the density can reach 5.7 ± 0.023 g/cm 3 and it is as same as dry pressing pellets, which is 95 ± 0.4 % of the empirical value. The printed ceramic exhibits excellent dielectric properties ( ε r = 572.7 ± 1.1 and tan δ = 0.0362 ± 0.0001 at 1KHz) and piezoelectric property ( d 33 = 133 ± 1.3 ). The results indicate that PPMJ is a promising 3D printing technology to fabricate piezoelectric materials with high solid content and complex geometries for the applications of ceramic components.
研究领域:
材料科学
·
陶瓷
·
增材制造
·
电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-12
·
IF 2.8
Tang Lanxin,Li Shuangchi,Wang Fang,Chen Yu
The binary perovskite-type compound (1 − x )BiFeO 3 – x BaTiO 3 (BF-BT) is considered as a promising high-temperature lead-free piezoelectric material due to its high Curie temperature ( T C > 400 °C) and better electromechanical properties. In this work, ternary lead-free piezoelectric ceramics with a chemical formula of (0.67 − x )BiFeO3–0.33BaTiO3– x Bi(Zn0.5Ti0.5)O 3 + 1 mol% MnO 2 (where x = 0–0.05) were prepared by the conventional solid-state reaction route. The effects of Bi(Zn 0.5 Ti 0.5 )O 3 introduction on the phase structures and microstructures, piezoelectric and dielectric properties, as well as impedance characteristics of BF-BT ceramics were investigated in detail. Firstly, all the samples synthesized exhibit a pure perovskite structure with the coexistence of rhombohedral ( R ) and tetragonal ( T ) phases, and the T phase content increases with increase in x . A small amount of Bi(Zn 0.5 Ti 0.5 )O 3 ( x ≤ 0.03) that were incorporated into the perovskite lattice of BF-BT can promote the grain growth of ceramics. Secondly, all samples were found with a notable relaxed phase transition behavior, T C of the system decreases with increase in x . The AC impedance spectra of the samples were fitted and analyzed according to the R-CPE equivalent circuit model, the electric impedance of the ceramics at high temperatures was mainly contributed by grain boundaries. Moreover, the dielectric relaxation activation energy of the samples firstly decreases and then increases with increase in x . Finally, the composition with x = 0.02 shows the optimized electrical properties among these samples, including T C = 454 °C, d 33 = 117 pC/N, k p = 23%, tan δ = 0.11, which are mainly benefited from the bismuth content compensation and the substitution of (Zn 0.5 Ti 0.5 ) 3+ for Fe 3+ at B-site reducing the valence change of Fe 3+ in BF-BT.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Weiwei Yang,Peng Li,Feng Li,Xing Liu,Bo Shen,Jiwei Zhai
In this study, 0.5 wt% MnO 2 doped (0.99- x )(K 0.5 Na 0.5 )(Nb 0.965 Sb 0.035 )O 3 –0.01CaZrO 3 - x (Bi 0.5 K 0.5 )(Hf 0.98 Ti 0.02 )O 3 [abbreviated as (0.99- x )KNNS-0.01CZ- x BKHT, x = 0.01, 0.02, 0.03, 0.04, 0.05, 0.06] lead-free piezoelectric ceramics were fabricated by traditional solid-state reaction method. The microstructure, phase transformation, electromechanical properties and the thermal stability of the ceramics were systematically studied. Resulting from the R-T phase coexisting, a large piezoelectric coefficient ( d 33 ~ 425 pC/N), planar electromechanical coupling factor ( k p ~ 49%) were achieved in the ceramics with x = 0.04. Furthermore, the specimens with x = 0.04 also exhibit excellent temperature stability for d 33 which was manifested by the less than 10% variation of d 33 values when the annealing temperature increase from 25 °C to 100 °C. The good comprehensive properties indicate that MnO 2 doped (0.99- x )KNNS-0.01CZ- x BKHT ceramics are promising candidates for practical application to eliminate the Pb-based piezoelectric ceramics from the market.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 23
·6092-6117
·
IF 5
Shadi Asgari,Ghodsi Mohammadi Ziarani,Alireza Badiei,Siavash Iravani
The emergence of piezocatalysts has led to advancements in catalyst design through the development of new technologies. Electron/hole piezocatalysis, a novel form of catalysis, utilizes piezoelectric materials that are stimulated by mechanical energy. This stimulation generates electrons and holes, which prove highly effective in promoting inefficient reactions, designing new reactions, and facilitating challenging chemical reactions and transformations. This review provides a concise historical account of electron/hole catalysis and the concept of piezoelectricity. Additionally, it explores various types of piezocatalysts, including piezoceramics (both lead-free and lead-based), piezopolymers, and piezocomposites. Notably, lead-free piezoceramics such as barium titanate and zinc oxide, as well as piezopolymers like polyvinylidene fluoride in β-phase and polyacrylonitrile in planar zigzag conformation, have gained significant recognition. The piezoelectric coefficient of polymers can be enhanced by adjusting the processing parameters and employing techniques such as blending, filler addition, stretching, and composite formation with piezo/non-piezo additives. Furthermore, piezoelectricity has been observed in unique materials such as ionic liquids, metal–organic frameworks, graphitic carbon nitride, black phosphorus, and MXenes. This review also presents recent research findings on the utilization of piezoelectric materials in various applications, including water splitting, water remediation, organic synthesis, and polymerization/crosslinking.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 11
·4044
·
IF 3.4
Runyu Mao,Deyi Zheng,Qiyun Wu,Yuying Wang,Chang Liu
The (Ba0.85Ca0.15) (Ti0.90Zr0.10)O3+xY3++xNb5+(abbreviated as BCZT-x(Nb + Y),x= 0 mol%, 0.05 mol%, 0.1 mol%, 0.2 mol%, 0.3 mol%) lead-free piezoceramics samples were prepared by a traditional solid-state sintering method. And the effects of Yttrium and Niobium elements (Y3+and Nb5+) co-doping on the defect, phase and structure, microstructure, and comprehensive electrical properties have been investigated. Research results show that the Y and Nb elements co-doping can dramatically enhance piezoelectric properties. It is worth noting that XPS defect chemistry analysis, XRD phase analysis and TEM results together show that a new phase of double perovskite structure Barium Yttrium Niobium Oxide (Ba2YNbO6) is formed in the ceramic, and the XRD Rietveld refinement and TEM results show the coexistence of the R-O-T phase. Both these two reasons together lead to significant performance improvements of piezoelectric constant (d33) and planar electro-mechanical coupling coefficient (kp). The functional relation between temperature and dielectric constant testing results present that the Curie temperature increases slightly, which shows the same law as the change of piezoelectric properties. The ceramic sample reaches an optimal performance atx= 0.1% of BCZT-x(Nb + Y), whered33= 667 pC/N,kp= 0.58,εr= 5656, tanδ= 0.022,Pr= 12.8 μC/cm2,EC= 2.17 kV/cm,TC=92 °C, respectively. Therefore, they can be used as potential alternative materials to lead based piezoelectric ceramics.Keywords:BCZT piezoelectric ceramics;double perovskite structure;phase structure;piezoelectric properties
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jinxi Feng,Tiantian Zhang,Wen Yan,Jingxiang Sun,Shuanghong Tian,Zhili He,Ya Xiong
A new piezo-catalytic reactor (PCR) was constructed. It was used to investigate the piezocatalytic degradation of pollutants and simultaneous response of current. It was found that PCR with SnO 2 / t -BaTiO 3 /ITO film anode possessed a more favourable piezocatalytic degradation and piezo-current response than PCR with only ITO or t -BaTiO 3 /ITO film anode, individually. For HCOOH, the degradation rate, short circuit current (I sc ) and open-circuit voltage (V oc ) reached 77.8 mg·L -1 ·h −1 , 5.12 µA, and 0.65 V, respectively, under its optimal condition. Its anodic process predominantly involved the piezocatalytic oxidations of H 2 O to •OH and HCOOH to CO 2 , while the cathodic process was mainly related to the reduction of O 2 to •O 2 – or H 2 O 2 and reduction of H + ion to H 2 . Although these processes were depended on the energy band structure of t -BaTiO 3 and redox potential of cathodic reactions, they were all initiated by the piezoelectric effect of t -BaTiO 3 , which drove the separation of intrinsic free carries to generate oxidative holes and reductive electrons. These investigation results and findings not only deepened the understanding of its piezo-current response, but also possibly extended the application of piezocatalysis to fuel cell.
研究领域:
环境科学
·
材料科学
·
催化
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Di Pan,Yiping Guo,Kai Zhang,Huanan Duan,Yujie Chen,Hua Li,Hezhou Liu
In this work, (K 0.48 Na 0.52 )NbO 3 −0.05Ca x (Bi 0.5 Na 0.5 ) 1− x ZrO 3 lead-free piezoelectric ceramics were prepared by a conventional solid-state sintering method. The effects of Ca content on their phase structure, microstructures, and piezoelectric properties were systematically studied. With the increasing of Ca content, the rhombohedral-orthorhombic phase temperature gradually increases and Curie temperature of the ceramics without a conspicuous change. In addition, appropriate Ca ( x ≤ 0.2) content promotes the grain growth, which leads to a denser microstructure. Rhombohedral-orthorhombic and orthorhombic-tetragonal phase coexistence has been obtained in the composition range of 0.15 ≤ x ≤ 0.3. The ceramics with x = 0.2 possess enhanced piezoelectric properties of d 33 ∼308 pC/N and k p ∼49.0%, together with a high Curie temperature of T C ∼328 °C. Therefore, the material system of this work is a promising candidate for piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2023
·
IF 3.1
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Peifeng Li,Huanfu Zhou,Dawei Wang
BiFeO 3 –BaTiO 3 is a promising lead-free piezoelectric ceramic, exhibiting high Curie temperature and superior electrochemical characteristics. In this work, ( 1 − x ) BiFeO 3 – x BaTiO 3 (BF– x BT, x = 0 . 2 6 , 0.28, 0.30, 0.32, 0.34, 0.36) ceramics were fabricated using the conventional solid-state reaction method through precise composition control. Multiple characterization techniques, including X-ray powder diffraction (XRD), scanning electron microscope (SEM), and electrical property testing systems, were applied to systematically examine the crystallographic structure, microstructure, as well as the dielectric, ferroelectric and piezoelectric properties of the BF– x BT ceramics. The XRD results confirm that all compositions exhibit a typical perovskite structure, transitioning from a single rhombohedral phase to a rhombohedral–cubic phase mixture as the BT content increases. SEM shows apparent core–shell microstructures in the ceramics. Notably, the results demonstrated that the BF–0.30BT ceramic exhibits the maximum piezoelectric constant ( d 3 3 ) ∼ 2 1 7 pC/N, while the BF–0.34BT ceramic displays the maximum converse piezoelectric constant ( d 3 3 ∗ ) ∼ 3 2 3 pm/V, which highlights the suitability of BF–BT ceramics for high-performance piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Zhengran Chen,Ruihong Liang,Chi Zhang,Zhiyong Zhou,Yuchen Li,Zhenming Liu,Xianlin Dong
High piezoelectric properties and superior thermal stability are both important indicators of piezoelectric ceramics serving at high temperature. However, since these properties are usually mutually exclusive, high performance and superior thermal stability are hard to achieve simultaneously. Here we report that a high piezoelectricity ( d 33 ∼ 562 pC/N) and superior thermal stability (the variation is within 7% from 20 to 330 °C) were both achieved in 0.4 mol% ZnO-doped 0.02Pb(Sb 1/2 Nb 1/2 )-0.51PbZrO 3 –0.47PbTiO 3 by high-temperature poling. Compared with traditional poling method, high-temperature poling method forms a small-sized and highly oriented domain structure, which can effectively improve the piezoelectric and dielectric properties of piezoelectric ceramics. At the same time, the enhanced pinning effect of defect ions and stabilized domain structure due to high-temperature poling also contribute to the superior temperature stability of the piezoelectric and dielectric properties. This work provides an effective method for designing piezoelectric materials with high performance and good temperature stability for high temperature sensor 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
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 8
·4280-4291
·
IF 11.9
Ya Liu,Wangshu Tong,Wanting Song,Tingting Cao,Yulun Liu,Lingchao Wang,Zhihao Wang,Yihe Zhang
Piezocatalysis can be used to harvest widely existing and renewable mechanical vibrations in the environment to convert mechanical energy into chemical energy, which is employed in various important applications, and typically, the polyvinylidene fluoride (PVDF)/graphene composite piezocatalyst is used because of its recyclability, flexibility, and easy preparation. However, its poor piezocatalytic performance, primarily attributed to the wrapped graphene in the PVDF matrix that prevents the generated charges from fully accessing pollutants, remains a challenge. Herein, we use phase conversion and the “self-assembly strategy” to prepare a sandwich film called PVDF-hexafluoropropylene@reduced graphene oxide (PVDF-HFP@rGO) with PVDF-HFP as the interlayer and rGO as the outer layer to fully expose rGO. Under magnetic stirring at 600 rpm, the degradation efficiency of PVDF-HFP@rGO toward methylene blue reaches ∼98% within 60 min, higher than those of the traditional composite film (∼75%) and pure PVDF-HFP film (∼8.0%). The charge supply by rGO, piezoelectric field provision by PVDF-HFP, and advantage of the sandwich structure are verified through contrast experiments under different conditions such as changing rGO band structures, varying PVDF-HFP interlayer thicknesses, and using different layer structures, respectively. Therefore, the enhanced piezocatalytic performance of the sandwich structure provides new insights into the structural design of high-performance PVDF/graphene composite piezocatalysts.
研究领域:
材料科学
·
环境科学
·
化学
✓ 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）