MATERIALS LETTERS
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2024
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IF 2.7
Xinlin Yang,Yun Shen,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
Ba(Cu 0.5 W 0.5 )O 3 (BCuW)-doped [(Ba 0.85 Ca 0.15 ) 1-x Dy x ](Zr 0.1 Ti 0.9 )O 3 (BCZT-xDy, x = 0.001, 0.03) ceramics were prepared by conventional ceramic processing via low-temperature sintering technique. Rather pure perovskite structure and densified morphology with irregular nearly spherical-shape grains are achieved in all ceramics due to liquid-phase sintering. All BCuW-doped BCZT-xDy ceramics present apparent dielectric frequency dispersion and relaxor ferroelectric characteristic due to ion substitution and adding BCuW. The ceramics prepared at optimized sintering temperatures have rather large strain and small strain hysteresis, showing prospect application in piezoelectric high-precision actuators.
研究领域:
材料科学
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陶瓷工程
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电子材料
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产品关联
DOI
高影响因子
Soft Matter
·
2024
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IF 2.9
Rongyan Hu,Xin Jiang,Yaxin Chen,Jinlong Wang,Yuhao Guo,Qiang Zheng,Yonggang Shangguan
The incorporation of reversible sacrificial bonds is an important strategy for enhancing the mechanical properties of elastomers. However, the research on the viscoelasticity of vulcanized rubber with a reversible sacrificial bond network lags seriously. In this paper, the effects of metal coordination bonds on the mechanical properties of butadiene–styrene–vinylpyridine rubber vulcanizates (VPR) were systematically investigated. The experimental results showed that lower temperature and higher strain rate under smaller strain were advantageous in reflecting the significant contribution of sacrificial bonding. Compared with the conventional rubber nanocomposites, the sacrificial bond enhanced the energy dissipation while also improving reversible hysteresis energy and its proportion, revealing the origin of better self-healing and damping properties. The high-temperature rearrangement of sacrificial bonds promoted not only the recovery of mechanical properties, but also the recovery of covalent networks. The evolution mechanism of the network structure and viscoelasticity research under different thermal–mechanical coupling conditions could help to control the rubber network structure, providing a promising method for the regulation of the nonlinear behavior of rubber composites.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 9
·期 5
·1822-1828
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IF 7.059
Mingcheng Wang,Hongwei Zhou,Xilang Jin,Hanbin Liu,Aijie Ma,Hanbing Yan,Lin Chen,Weixing Chen
Compliance and low strain hysteresis are of great importance for wearable devices and electronic skins, but it is still a challenge to obtain materials with high compliance, low strain hysteresis and sensing ability for electronic skins. In this work, we have achieved highly compliant and low strain hysteresis sensory electronic skins (SESs) utilizing solution processable hybrid hydrogels. The hybrid hydrogels are constructed by incorporating polyaniline (PANI) into poly(vinyl alcohol) (PVA). By regulating the contents of PVA and PANI, the elastic modulus of the PVA/PANI hybrid hydrogels can be tuned in the range of 15.7–154.4 kPa, which covers the elastic modulus of human soft tissue (≈30 kPa). The PVA/PANI hybrid hydrogels also achieve low strain hysteresis and exhibit outstanding recovery during the cyclic loading–unloading process. In such hydrogels, PANI works as the conductive component and contributes to the conductivity of the hybrid hydrogels (13.3 S m−1). Further investigations reveal that the compliant SESs possess high sensitivity (GF = 4.28), outstanding stability (>1000 cycles) and low response time (250 ms). Because of the fully physically cross-linked structure, the hydrogels in SESs are completely solution processable and can be regenerated. By introducing glycerol into the hybrid hydrogels, the flexibility of SESs can be kept at least for one week and the sensing ability is also well maintained. Finally, we demonstrate that SESs exhibit reliable sensing ability in monitoring representative human movements, such as joint bending and swallowing.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Leiyang Zhang,Ruiyi Jing,Hongliang Du,Yunyao Huang,Qingyuan Hu,Yuan Sun,Yunfei Chang,Denis Alikin,Xiaoyong Wei,Wenwu Cao,Vladimir Shur,Shujun Zhang,Dragan Damjanovic,Li Jin
The electrostrictive effect, which induces strain in ferroelectric ceramics, offers distinct advantages over its piezoelectric counterpart for high-precision actuator applications, including anhysteretic behavior even at high frequencies, rapid reaction times, and no requirement for poling. Historically, commercially available electrostrictive materials have been lead oxide-based. However, global restrictions on the use of lead in electronic components necessitate the exploration of lead-free electrostrictive ceramics with a high strain performance. Although various engineering strategies for producing materials with high strain have been proposed, they typically come at the expense of increased strain hysteresis. Here, we describe the extraordinary electrostrictive response of (Ba0.95Ca0.05)(Ti0.88Sn0.12)O3 (BCTS) ceramics with ultrahigh electrostrictive strain and negligible hysteresis achieved through texture engineering leveraging the anisotropic intrinsic lattice contribution. The BCTS ceramics exhibit a high unipolar strain of 0.175%, a substantial electrostrictive coefficient Q33 of 0.0715 m4 C–2, and an ultralow hysteresis of less than 0.8%. Notably, the Q33 value is three times greater than that of high-performance lead-based Pb(Mg1/3Nb2/3)O3 electrostrictive ceramics. Multiscale structural analyses demonstrate that the electrostrictive effect dominates the BCTS strain response. This research introduces a novel approach to texture engineering to enhance the electrostrictive effect, offering a promising paradigm for future advancements in this field.
研究领域:
材料科学
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陶瓷工程
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电陶瓷
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执行器技术
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产品关联
DOI
PubMed
高影响因子
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