Crystals
·
2020
·Vol. 10
·期 8
·705
·
IF 2.404
Yunfeng Deng,Junjun Wang,Chunxiao Zhang,Hui Ma,Chungeng Bai,Danqing Liu,Fengmin Wu,Bin Yang
Structural, ferroelectric, dielectric, and piezoelectric properties of K0.5Na0.5NbO3-LiTaO3-xmol%MnO2lead-free piezoelectric ceramics with 0.0 ≤x≤ 0.3 were studied. The ceramic samples were synthesized through the conventional solid-state reaction method. The MnO2addition can reduce the sintering temperature of KNLNT ceramics. Compared with undoped KNLNT ceramic, the piezoelectric measurements showed that piezoelectric properties of K0.5Na0.5NbO3-LiTaO3-xMnO2were improved (d33= 251 pC/N) whenx= 0.1. In addition, KNLNT-xMnO2ceramics have largerPr(20.59~21.97 μC/cm2) and smallerEc(10.77~6.95 kV/cm), which indicates MnO2has excellent softening property, which improves the ferroelectric properties of KNLNT ceramics This work adds relevant information regarding of potassium sodium niobate K0.5Na0.5NbO3(KNN) when doped Li, Ta, Mn at the B-site.Keywords:KNLNT ceramics;MnO2doped;ferroelectricity;piezoelectricity
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
SENSORS
·
2019
·Vol. 19
·期 4
·830
·
IF 3.031
Jing Han,Dong Li,Chunmao Zhao,Xiaoyan Wang,Jie Li,Xinzhe Wu
A thin film of polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) has good flexibility and simple preparation process. More importantly, compared with PVDF, its piezoelectric β-phase can be easily formed without mechanical stretching. However, its piezoelectricity is relatively lower. Therefore, at present, PVDF-TrFE is always compounded with other kinds of piezoelectric materials to solve this problem. The effect of nano-ZnO doping amount on the sensing characteristics of the piezoelectric films was studied. PVDF-TrFE/nano-ZnO films with different nano-ZnO contents were prepared by spin coating process and packaged. The dispersion of nano-ZnO dopants and the crystallinity of β-phase in piezoelectric films with different nano-ZnO contents were observed by scanning electron microscopy and X-ray diffraction, and the piezoelectric strain constants and dielectric constants were measured, respectively. The effect of different nano-ZnO contents on the output performance of the piezoelectric sensor was obtained by a series of impact experiments. The results show that the piezoelectric strain constant and dielectric constant can be increased by doping nano-ZnO in PVDF-TrFE. Moreover, the doping amount of nano-ZnO in PVDF-TrFE is of great significance for improving the piezoelectric properties of PVDF-TrFE/nano-ZnO thin films. Among the prepared piezoelectric films, the output voltage of PVDF-TrFE/nano-ZnO piezoelectric sensor with 7.5% nano-ZnO doping amount is about 5.5 times that of pure PVDF-TrFE. Thus, the optimal range of the doping amount for nano-ZnO is about 4–10%.Keywords:piezoelectric;PVDF-TrFE;nano-ZnO;flexion sensor
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Yuan Bai,Gang Tang,Lei Xie,He Lian,Shihao Wang,Chaopeng Liu,Qiao Yu,Jianying Ji,Kailiang Ren,Xiaodan Cao,Cong Li,Lili Zhou,Yizhu Shan,Hongyu Meng,Zhou Li
Flexible films with optimal piezoelectric performance and water-triggered dissolution behavior are fabricated using the co-dissolution–evaporation method by mixing trimethylchloromethyl ammonium chloride (TMCM-Cl), CdCl 2 , and polyethylene oxide (PEO, a water-soluble polymer). The resultant TMCM trichlorocadmium (TMCM-CdCl 3 ) crystal/PEO film exhibited the highest piezoelectric coefficient (d 33 ) compared to the films employing other polymers because PEO lacks electrophilic or nucleophilic side-chain groups and therefore exhibits relatively weaker and fewer bonding interactions with the crystal components. Furthermore, upon slightly increasing the amount of one precursor of TMCM-CdCl 3 during co-dissolution, this component gained an advantage in the competition against PEO for bonding with the other precursor. This in turn improved the co-crystallization yield of TMCM-CdCl 3 and further enhanced d 33 to ≈71 pC/N, exceeding that of polyvinylidene fluoride (a commercial flexible piezoelectric) and most other molecular ferroelectric crystal-based flexible films. This study presents an important innovation and progress in the methodology and theory for maintaining a high piezoelectric performance during the preparation of flexible multi-component piezoelectric crystal films.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 21
·17258-17271
·
IF 2.779
Zhou Chuang,Cai Wei,Yang Xue,Zhang Qianwei,Chen Dakai,Wang Yaohan,Huang Rui,Du Mingchao,Gao Rongli,Chen Gang,Deng Xiaoling,Wang Zhenhua,Lei Xiang,Fu Chunlin
(K,Na)NbO 3 − x at.% Tm 2 O 3 (KNNT x ) piezoelectric ceramics with submicron grain size were successfully prepared by solid-state method combined with microwave sintering. With the increase of content of Tm 3+ , KNNT x ceramics gradually transformed from orthorhombic (O) phase to the coexistence of O and tetragonal (T) phase at room temperature, and the phase transition temperature of O–T phase shifted to low temperature region. The leakage behaviors, dielectric, ferroelectric, and piezoelectric properties of KNNT x ceramics depend on the structure evolution, cationic vacancy and grain refinement caused by Tm 3+ doping, and the relevant mechanisms have been illustrated. The substitution of Tm 3+ at A sites increases the critical driving force for the rapid growth of grains and obviously refine the grain of KNNT x ceramics, resulting in its deteriorated ferroelectricity and enhanced piezoelectricity. Especially the piezoelectric constant of KNNT x ceramics increased from 109.8 to 163.6 pC/N. These findings are of great significance for developing excellent lead-free piezoelectric materials.
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
·
2020
·Vol. 31
·期 12
·9352-9365
·
IF 2.22
Li Cai-Xia,Yang Bin,Zhang Shan-Tao,Hong Yue-Nan,Liu Dan-Qing,Zhang Rui,Shuo Gu,Cao Wen-Wu
Lead-free Ba 0.70 Ca 0.30 TiO 3 + x mol% MnO 2 (abbreviated as BCTM x , x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 1.0 and 1.2) piezoelectric ceramics were synthesized by the solid-state reaction method. The effects of MnO 2 additives on the phase transition, microstructure, dielectric, ferroelectric, strain behaviors and piezoelectric properties are investigated. BCTM x ceramics ( x = 0–1.2) exhibit diphasic tetragonal and orthorhombic phases. The tetragonal phase is gradually suppressed by increasing x . As x increases from 0 to 1.2, the Curie temperature ( T C ) decreases monotonically from 128 to 45 °C, while the grain size, dielectric and ferroelectric properties increase and reach the maximum near x = 0.6. On the other hand, the piezoelectric coefficient ( d 33 ) and the electromechanical coupling coefficient ( k p %) decrease simultaneously, whereas the mechanical quality factor ( Q m ), bipolar and unipolar strain increase and reach the maximum values of 684, 0.28% and 0.24%, respectively, near x = 0.6. The optimum electrical performance with \(\varepsilon_{r}\) = 1323, tan \(\delta\) = 0.08, T C = 66 °C, P max = 12.2 μC/cm 2 , P r = 6.9 μC/cm 2 , E C = 13.3 kV/cm, d 33 = 116 pC/N, k p % = 0.22%, Q m = 684 and the normalized strain \(d_{33}^{*}\) = S max / E max as high as 480 pm/V were observed for x = 0.6. The high strain and Q m suggested that the MnO 2 -modified Ba 0.70 Ca 0.30 TiO 3 ceramics are promising candidate for high power applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xuan Zhang,Cheng Han,Xingneng Wei,Xingang Liu,Chuhong Zhang
Three-dimensional (3D) poly(vinylidene fluoride) (PVDF)-based piezoelectric energy harvesters (PEHs) offer exceptional electromechanical conversion capabilities due to their flexible structures and customizable designs. However, how to design and construct such structures with enhanced strain for a higher piezoelectric output remains a complex challenge. This study presents a novel approach by combining the versatility of 3D printing with solvent exchange to create a unique 3D porous bamboo-structured PVDF/MXene PEH, allowing for a tailored hollow structure by adjusting the temperature and solvent concentration. This flexible design and construction of the macro- and micro-3D structures enables a synergistic amplification of stress–strain, hence a significant enhancement of the overall electromechanical conversion efficiency of the PEH. Additionally, the incorporation of MXene, with its abundant functional groups, achieves a high β-crystal content (92.6%) in the PVDF-based PEH. This coupling effect contributes to a piezoelectric output of 47 V and maximum sensitivity of 0.727 V/kPa, surpassing most PVDF-based sensors reported to date. Notably, the 3D PEH demonstrates its potential as a self-powered pressure sensor for monitoring human motions across varying amplitudes. This work unveils a universal strategy for harnessing 3D PEHs with high electromechanical conversion efficiency, paving the way for various applications in the fields of smart sensing and energy harvesting.
研究领域:
材料科学
·
能源技术
·
智能传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 7
·9032-9043
·
IF 2.478
Liu Yunyi,Pan Yongqi,Bai Xudong,Wang Jinchuan,He Caiwang,Xu Zunping,Chen Yi
A conventional ceramic preparation method was used to fabricate the newly designed ternary (K,Na)NbO 3 -based lead-free ceramics, which have the general formula of (0.97- x )K 0.40 Na 0.60 Nb 0.95 Sb 0.05 O 3 –0.03Bi 0.5 K 0.5 HfO 3 – x SrZrO 3 . An X-ray diffraction analysis, together with dielectric-temperature measurements, was performed for determining their phase structures. The crystal structure was found to transition from a rhombohedral-orthogonal phase coexistence to a three-phase coexistence of rhombohedral-orthogonal-tetragonal phases with the increase in SrZrO 3 concentration, and then to a rhombohedral-tetragonal phase coexistence, and finally to a single rhombohedral phase. Near the three-phase coexistence zone, the ceramics exhibit an obviously enhanced electrical activity, with an electromechanical coupling coefficient k p = 0.364 and a piezoelectric constant d 33 = 280 pC/N. Through a microstructure analysis, a slightly excessive amount of SrZrO 3 was found to result in an inhibition for the grain growth of the studied ceramics. These results show that incorporating SrZrO 3 into ternary (K,Na)NbO 3 -based ceramics is still an effective means of constructing phase boundaries and improving the electromechanical properties.
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 THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Lang Bian,Xudong Qi,Kai Li,Jinhui Fan,Zhanmiao Li,Enwei Sun,Bin Yang,Shuxiang Dong,Wenwu Cao
Ternary 0.552Pb(Ni 1/3 Nb 2/3 )O 3 -xPbZrO 3 -(0.448-x)PbTiO 3 (PNN-PZ-PT) ceramics near the triple point compositions were fabricated by an improved two-step sintering method. The triple point composition 0.552PNN-0.135PZ-0.313PT ceramic has outstanding piezoelectric performance with piezoelectric coefficient d 33 = 1200 pC/N. Its easy fabrication and low cost make this piezoelectric material an excellent candidate for high sensitivity sensors and ultrasonic transducers. The evolution of domain structures for ceramics with composition near the triple point provides deeper insight into the mechanism of ultrahigh piezoelectric properties of PNN-PZ-PT ceramics.
研究领域:
材料科学
·
电陶瓷
·
压电材料
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Huajun Sun,Saihong Duan,Xiaofang Liu,Dawei Wang,Huiting Sui
Lead-free Ba 0.98 Ca 0.02 Zr 0.02 Ti 0.98 O 3 -xmol% MnO 2 (BCZT-xMn) (x = 0.1, 0.2, 0.3, 0.4, 0.5) ceramics were prepared by conventional solid-state reaction method and the effects of MnO 2 doping content and sintering temperature on microstructure and electrical properties of BCZT ceramics were studied. The ceramics samples with all MnO 2 doping contents exhibit pure perovskite structure and similar Curie temperature of approximately 120 °C. Among all, the sample with 0.3 mol. % MnO 2 doping content sintered at 1400 °C exhibits improved ferroelectricity with a relatively high remnant polarization ( P r ) and low coercive electric field ( E c ) of 15.7 μC/cm 2 and 180 V/mm, respectively, which can be attributed to the fact that an appropriate doping content of MnO 2 does favor to the grain growth, with the favorable effect on domain motion. Accordingly, excellent piezoelectric property with piezoelectric coefficient ( d 33 ) of 308 pC/N can be obtained. Besides, the sample shows a relatively low dielectric loss (tanδ) of 1.04%. As a result, the BCZT-xMn ceramic exhibits the potential to be used in memory and transformer applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bowei Xun,Aizhen Song,Jingru Yu,Yang Yin,Jing-Feng Li,Bo-Ping Zhang
BiFeO3-BaTiO3 is a promising high-temperature piezoelectric ceramic that possesses both good electromechanical properties and a Curie temperature (TC). Here, the piezoelectric charge constants (d33) and strain coefficients (d*33) of (1 – x)BiFeO3-xBaTiO3 (BF-xBT; 0.20 ≤ x ≤ 0.50) lead-free piezoelectrics were investigated at room temperature. The results showed a maximum d33 of 225 pC/N in the BF-0.30BT ceramic and a maximum d*33 of 405 pm/V in the BF-0.35BT ceramic, with TCs of 503 and 415 °C, respectively. To better understand the performance enhancement mechanisms, a phase diagram was established using the results of XRD, piezoresponse force microscopy, TEM, and electrical property measurements. The superb d33 of the BF-0.30BT ceramic arose because of its location in the optimum point in the morphotropic phase boundary, low oxygen vacancy (VO··) concentration, and domain heterogeneity. The superior d*33 of the BF-0.35BT ceramic was attributed to a weak relaxor behavior between coexisting macrodomains and polar nanoregions. The presented strategy provides guidelines for designing high-temperature BF-BT ceramics for different applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
ACTA MATERIALIA
·
2022
·
IF 9.209
Shengdong Sun,Ye Liu,Yueyun Zhang,Lu Wang,Chuanrui Huo,Shiqing Deng,Hui Liu,Yang Ren,Jie Wu,He Qi,Jun Chen
Owing to the mutual restriction between piezoelectric coefficient ( d 33 ) and Curie temperature ( T c ), the discovery of high-temperature piezoceramics with large d 33 is highly desirable but challenging. Here, BiFeO 3 -BaTiO 3 -PbTiO 3 (BF-BT-PT) ternary system is redesigned by combining the low lattice distortion of BF-BT perovskites and rhombohedral-tetragonal coexistence of BF-PT phase boundary. As a result, excellent comprehensive piezoelectric properties with a large d 33 of ∼380 pC/N and a high T c of ∼483 °C are obtained in a tetragonal composition close to the triple point. Interestingly, even though a c / a ratio as large as 1.04 can be detected in the virgin sample, hierarchical domains that macrodomains composed of nanosized stripe domains can be found. The tetragonal phase could partly transform into a monoclinic phase under electric field according to in-situ high-energy synchrotron X-ray diffraction measurement , constructing a field-induced morphotropic phase boundary. The large lattice distortion and unstable phase structure simultaneously contribute to the high T c, and large d 33 for the studied BF-BT-PT ceramics, respectively, showing great potential for high-temperature sensors and transducers.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 7
·2085
·
IF 3.5
Rui Li,Juqi Wang,Aolin Li,Quanbin Ma,Shi Feng,Bo Ran,Lingling Zhang
Flexible wearable electronic devices have found widespread applications in health monitoring and human–machine interaction. Piezoelectric sensors, capable of converting mechanical stress into electrical signals, serve as critical components in these systems. In this study, we enhanced the piezoelectric performance of PVDF-based composite materials through MoS2incorporation. Experimental results demonstrated that MoS2addition effectively increased the β-phase content in PVDF, achieving a maximum value of 70.0% at an optimal MoS2concentration of 0.75 wt%. Density functional theory (DFT) calculations revealed that while β-phase PVDF possesses slightly higher energy than other phases, it exhibits stronger adsorption interactions and enhanced charge transfer with MoS2, thereby promoting β-phase formation. The fabricated MoS2/PVDF composite nanofiber film maintained stable voltage output under repeated mechanical stress through 2000 operational cycles. When implemented as a body-mounted sensor, the composite material demonstrated exceptional responsiveness to human motions, confirming its practical potential for wearable electronics applications.
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
危险品化学品经营许可证（带存储）