MATERIALS CHEMISTRY AND PHYSICS
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2022
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IF 4.778
Xin Long,Pengkai Tang,Wei Chen,Linnan Bi,Xiongbang Wei,Sizhe Wang,Jiaxuan Liao
Lead zirconate titanate (PZT) aerogels are ideal piezoelectric materials for underwater acoustic transducers (UATs) due to their light structure, but their difficult preparation, poor mechanical properties and poor integrated electrical properties greatly limit their practical applications. In order to overcome these difficulties, we innovatively adopted a solvothermally combined sol-gel method to successfully achieve simple, rapid, and low-cost preparation of PZT aerogels, designed a 0–3 type PZT aerogel/PVDF composite coating to overcome the weak mechanical properties of PZT aerogels, and used SiO 2 aerogels and PZT ceramic powders to improve the ferroelectric and piezoelectric properties of the PZT aerogel/PVDF composite coating, respectively. After verifying that the PZT aerogel/PVDF composite coating modified by 4 wt% SiO 2 aerogels and 30 wt% PZT ceramic powders has the best integrated electrical properties, we prepared its 50-layer combination to further improve the comprehensive properties. The 50-layer composite coating has a moderate piezoelectric constant d 33 of 132.7 pC/N and a high piezoelectric constant d 31 of −33.6 pC/N, a low relative permittivity of 593.7 and a low dielectric loss of 0.85% at 40 Hz, a high Young's modulus of 616.2 MPa, and a density of 1.163 g/cm 3 similar to water, indicating that it has surpassed various high-performance Pb-containing piezoelectric ceramics in integrated electrical properties, mechanical properties and acoustic impedance matching with water, which is more in line with the needs of use in UATs. This research offers a new pathway to design a piezoelectric material for UATs with light structure and excellent comprehensive properties.
研究领域:
材料科学
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声学工程
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2023
·Vol. 52
·期 11
·7193-7207
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IF 2.1
Yuan ChongXiao,Zhang Chao,Yang Cheng,Wu Fuling,Xiao Shibing,Sun Huajun
Flexible wearable sensing devices are in great demand for self-powered systems. In this study, we fabricated fiber films of poly(vinylidene fluoride) (PVDF) matrix embedded with modified lead zirconate titanate nanoparticles (PZT NPs) using the electrospinning process. Each fiber film was cut into small pieces of 2 × 2 cm 2 , and pairs of pieces were pressed with a hot-pressing method. Modified PZT NPs with a high piezoelectric coefficient were embedded in PVDF fibers as a piezoelectric-reinforcing phase, which promoted the formation of the polar β phase in PVDF. The embedded PZT NPs affected the distribution of the polarized electric field and formed a local electric field between two PZT NPs, which promoted the polarization of PVDF, thereby enhancing the piezoelectric properties of PVDF/PZT NPs fiber films. The piezoelectric coefficient ( d 33 ) of the PVDF/PZT NPs fiber films embedding 4 wt.% PZT NPs showed the most significant enhancement, from 12 pC/N for neat PVDF to 21 pC/N, which is an approximately 75% improvement. The results of this work demonstrate the great potential application of piezoelectric composite fiber films in flexible wearable sensing devices.
研究领域:
材料科学
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纳米技术
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传感器
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可穿戴技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xiaofei Liu,Jian Wang,Zhonghui Shen,Hongjian Zhang,Baowen Li,Yong Zhang,Xin Zhang
Flexible organic/inorganic piezoelectric nanocomposites are highly demanded for flexible wearable electronic devices due to their excellent mechanical flexibility and high piezoelectric performance. However, the output performance of ceramic-polymer-based piezoelectric nanogenerators (PENGs) is restricted by the poor electrical conductivity of the organic matrix and the distinct discrepancy in mechanical strength between inorganic filler and organic matrix. Herein, we propose a flexible piezoelectric polymer nanocomposite based on CNTs@PZT nanofibers (NFs) network where the carbon nanotubes (CNTs) were introduced into the piezoelectric lead zirconate titanate (PZT) NFs to simultaneously improve the electrical conductivity and mechanical strength of nanocomposites. When subjected to a periodical bending deformation , the CNTs@PZT NFs network-based PENG with optimal addition of CNTs (0.6 wt%) generates a maximum electrical output up to ∼12.5 V and ∼80 nA cm −2 which is four times higher than that of PENGs without CNTs doping. An ultrahigh power density of 91.7 nW cm −2 is obtained with an external load resistance of 40 MΩ when pressed via a 10 N compressive force , and furthermore, the generated power could charge a capacitor and further light a commercial LED. This work may pave a new way for the development of high-output nanocomposite-type PENGs.
研究领域:
材料科学
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纳米科技
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能源材料
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柔性电子学
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功能材料
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DOI
高影响因子
Materials Today Communications
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2025
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IF 4.5
Junyan Lin,Lele Chen,Chubin Li,Zuyun Chen,Jiapei Yang,Yuqi Zeng,Yuanxin Jiang,Yu Zhang,Weiwei Xing,Jiye Zhang,Jian-Guo Chen,Kai Guo
Grain boundaries or phase boundaries, which play a pivotal role in decoupling electrical and thermal transport, are frequently engineered to regulate thermoelectric performance. Although extensive research has been conducted on their composition, density, coherency, and width, relatively limited attention has been paid to the strategic utilization of local electric fields at these interfaces for manipulating charge carrier and phonon transport. By incorporating piezoelectric material Pb(Zr 0.50 Ti 0.44 Fe 0.06 )O 3 into thermoelectric material Ge 0.94 Sb 0.06 Te, a local electric field is generated that effectively impedes the transport of low-energy holes. This innovative approach results in a noteworthy enhancement of the Seebeck coefficients in the composites without compromising electrical conductivity. Consequently, an improvement in zT values can be achieved for the sample Ge 0.94 Sb 0.06 Te+ 0.3 wt% Pb(Zr 0.50 Ti 0.44 Fe 0.06 )O 3 , showing a 15 % increase compared to the sample without Pb(Zr 0.50 Ti 0.44 Fe 0.06 )O 3 . Simulation results further corroborate the practical significance of this approach, predicting an impressive conversion efficiency of 10.7 % for a single-leg thermoelectric device, thereby underscoring its considerable potential for power generation applications.
研究领域:
材料科学
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热电材料
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固体物理
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纳米技术
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能量转换
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产品关联
DOI
高影响因子
Microsystems & Nanoengineering
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2025
·Vol. 11
·期 1
·1-14
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IF 9.9
Liang Shan,Liu Shiwei,Long Zhihe,Li Xiaojiao,Han Qian,Wei Xianhao,Xing Lili,Xue Xinyu,Chen Meihua
Atopic dermatitis is a chronic inflammatory skin condition that typically manifests in infancy and is characterized by dry, irritated skin. Here, we propose a self-powered hydration-monitoring and drug-delivery skin patch for closed-loop treatment of atopic dermatitis. The patch is composed of piezoelectric generator, hydration sensing unit, microneedle treatment module and flexible circuit. The piezoelectric PZT generator can achieve self-powering by harvesting mechanical energy from patient activities, allowing for long-term work of the system without external power sources. The hydration sensing unit can rapidly and accurately detect changes in skin hydration by estimating the thermal conductivity. Upon detecting abnormal skin hydration levels for 65 s, the treatment module is automatically activated, heating hyaluronic acid-based microneedles (~42 °C) to release dexamethasone sodium phosphate (DEX), thereby providing timely targeted therapy and moisturization to the affected area within minutes. Therapeutic results in mice model of atopic dermatitis demonstrate that our patch can effectively treat this skin disease, improving the epidermal thickness, IL-4, spleen size and mass. The system achieves closed-loop detection and treatment of atopic dermatitis without external intervention, offering a novel approach to managing skin disease and expanding the scope of self-powered biomedical engineering systems. A self-powered hydration-monitoring and drug-delivery skin patch is designed for closed-loop treatment of atopic dermatitis. The patch composes of piezoelectric generator, hydration sensing unit, microneedle treatment module, and flexible circuit. This integrated system achieves closed-loop detection and treatment of atopic dermatitis without external intervention, offering a novel approach to managing skin disease and expanding the scope of self-powered biomedical engineering systems
研究领域:
生物医学工程
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皮肤病学
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智能药物递送系统
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柔性电子学
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能量收集
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 1
·1-9
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IF 2.8
Song Peiqi,Zhu Zhe,Yao Zhonghua,Hao Hua,Cao Minghe,Liu Hanxing
Piezoelectric materials are widely used in the direction of sensors. PZT-based ceramics are very suitable for precision sensors. However, due to the low Curie temperature, the application temperature range of the material is relatively narrow. Here we show a high-performance material 0.6PZT–0.4PNN. In this case, a morphotropic phase boundary (MPB) region was artificially designed in the 0.6Pb(Zr x Ti 1 −x )O 3 –0.4Pb(Ni 1/3 Nb 2/3 )O 3 ( x = 0.35–0.41) ceramics to develop high-performance piezoelectric compositions which could cofire with low-cost Ag/Pd inner electrode by 0.2wt% Li 2 CO 3 addition. The ceramic composition at x = 0.39 near MPB possess exceptional properties with high piezoelectric coefficient d 33 ∼ 611 pC/N, planar electromechanical coupling coefficient k p ∼ 53.5%, low mechanical quality factor Q m ∼ 64.5 piezoelectric strain of 0.17%, and suitable Curie temperature T c ∼ 191 °C, respectively. The fact that d 33 was detected close to T c , and no noticeable change below 6.6% in cycling stability was observed at 20 kV/cm means a robust temperature-independence and fatigue reliability of the piezoelectric ceramics. Thus, this research provides a novel high-piezoelectricity configuration with elemental regulation, comparable to the commercial PZTs.
研究领域:
材料科学
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陶瓷
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固体物理
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传感器技术
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电子陶瓷
✓ 已验证
DOI
高影响因子
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