Journal of Materiomics
·
2024
·
IF 8.4
Yingzhi Meng,Silin Tang,Zhaojie Wang,Xiang Niu,Hongfang Zhang,Dingyuan Wang,Yisong Bai,Biaolin Peng,Sheng-Guo Lu,Qingqing Ke,Laijun Liu
The electrocaloric effect (ECE) offers a pathway to environmentally sustainable and easily miniaturized refrigeration technology, positioning it as a front-runner for the next generation of solid-state cooling solutions. This research unveils a remarkable ECE in a finely tuned (Ba 0.86 Ca 0.14 ) 0.98 La 0.02 Ti 0.92 Sn 0.08 O 3 ceramic, exhibiting a temperature shift (Δ T ) of 1.6 K across more than 85% of the maximum Δ T (Δ T max ) and spanning an exceptionally wide operational range of 92 K. Our investigation on dielectric responses and ferroelectric polarization-electric field ( P–E ) loops suggests that the broad operational scope results from the fragmentation of extended ferroelectric domains into smaller domains and polar nano-regions (PNRs) supported by PFM analysis. Furthermore, the introduction of La enhances spontaneous polarization by significantly extending the maximum electric field that can be applied, facilitating high-performance ECE at ambient temperature. This study positions BaTiO 3 -based lead-free ceramic as a sustainable alternative for addressing the cooling demands of modern electronic components, marking a significant stride toward next-generation solid-state refrigeration.
研究领域:
材料科学
·
固态制冷技术
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS LETTERS
·
2019
·Vol. 115
·期 5
·
IF 3.521
Wang Jinxin,Jiang Guicheng,Huang Weicheng,Liu Danqing,Yang Bin,Cao Wenwu
Materials with an electrocaloric effect (ECE) have been extensively studied for their cooling applications. Most ECE films are oriented and are difficult to integrate into industrial production processes. Here, an ECE ( ΔS = 4.48 J K −1 kg −1 and ΔT = 6.4 °C at ΔE = 390 kV cm −1 ) is obtained in an unoriented PbZr 0.95 Ti 0.05 O 3 (PZT) film fabricated on an FTO substrate using an improved sol-gel method. To improve the ECE, Si-doped PZT films with 1–4 mol. % of Si are deposited. X-ray diffraction and X-ray photoelectron spectroscopy results confirm that Si was doped into the PZT lattice. The orthorhombic and tetragonal antiferroelectric phases coexist in the PZT/0.01 Si film. A large ECE ( ΔS = 5.89 J K −1 kg −1 and ΔT = 8.5 °C at ΔE = 390 kV cm −1 ) is acquired in the PZT/0.01 Si film, which was measured by an indirect method. This work demonstrates that ECE of unoriented PZT antiferroelectric films on FTO substrates can be improved by a certain amount of Si doping.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2018
·
IF 3.794
Biao Lu,Yingbang Yao,Xiaodong Jian,Tao Tao,Bo Liang,Q.M. Zhang,Sheng-Guo Lu
The electrocaloric effect (ECE) in gadolinium and tin ions doped lead lanthanum zirconate titanate ceramics was investigated. Five samples with different compositions and hence different relaxor behaviors and polarization properties were prepared via a conventional solid-state reaction process. The ECE was measured directly by a high resolution thermometer from 293 K to 423 K. The results show that the ECE is mainly determined by the number of polarization states and polar-correlation strength . Furthermore, the results reveal that the temperature variation of ECE around Curie temperature is associated with the generation rate, activation energy , size and freezing temperature of polar nanoregions. As a result, Sn doped PLZT composition exhibits the best ECE, i.e. , a peak ΔT > 2 K obtained at 5 MV/m, and ΔT > 1.78 K achieved in the whole temperature range measured at the same field, which are very attractive for high performance ECE devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2018
·
IF 0
Jiang Li,Dan-Dan Li,Biao Lu,Ying-Bang Yao,Tao Tao,Bo Liang,Wen-Hui Lu,Ge-Li Luo,Sheng-Guo Lu
The electrocaloric effect (ECE) in lead-free BaSn x Ti 1 − x O 3 (BSnT, x = 0 . 0 5 , 0.10 and 0.15) ceramics were investigated using a direct ECE measurement. Results indicate that the maximum ECE occurs near the Curie temperature and it slightly shifts towards high temperatures. The directly measured ECE is larger than that calculated using the Maxwell relation and P-E loops. A maximum electrocaloric efficiency Δ T ∕ Δ E = 0 . 4 9 × 1 0 − 6 KmV − 1 was procured for the composition with x = 0 . 1 5 at T = 2 9 9 . 2 K. And it also shows a broad peak in the temperature range of 250–320 K.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Chongchong Yang,Dandan Zhu,Chengyuan Sun,Buyun Chen,Yinghao Li,Indra Neel Pulidindi,Zhen Zheng,Xinling Wang
A more facile and more efficient self-healing strategy for carbon fiber/thermoset resin interphase was established based on electrothermal effect of carbon fiber (CF) driving the reversible transformation of covalent bonds . Diels-Alder cycloaddition adduct was introduced into the CF/epoxy (EP) interphase region to endow the interphase with thermoreversible covalent bonds through the oxidative co-polymerization and chemical surface grafting, which was nondestructive but more efficient. The modified carbon fiber was characterized via SEM , AFM, XPS and TGA. The CF/EP interphase temperature range in CF reinforced polymer composites (CFRPs) was adjusted through controlling the electric current applied to CFs according to the thermo-sensitivity of CF. The effect of electrothermal effect on the matrix resin around CFs was measured by micro-FTIR. The interfacial shear strength (IFSS) measurement verified that the electrothermal effect promoted the reversible transformation of the Diels-Alder cycloaddition adducts connecting the modified CFs with matrix resin, resulting in the self-healing behavior of the damaged interphase. This self-healing strategy not only can improve the interfacial adhesion of CFRPs without damages to the CF surface caused by the traditional oxidation modification methods, but also can reduce the possible heating aging and deformation of composites caused by convective thermal repairing methods. This strategy is a more efficient process.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2024
·
IF 4.3
Yuanting Deng,Feng Du,Zongbao Chen,Pengyu Lv,Zuozhu Yin,Ming He,Mingshan Xue,Hongyuan Li
Superhydrophobic surfaces offer notable advantages, including markedly low water affinity and reduced ice adhesion strength. Nevertheless, their practical utility is impeded by their limited durability and vulnerability to failure in cold and humid environments. In this study, a novel approach for devising an electro-photothermal superhydrophobic (EPS) nanocomposite coating is presented. The findings indicate that the EPS nanocomposite coating exhibits both physical and chemical self-cleaning attributes, showcasing a synergistic interplay of superhydrophobicity, electrothermal, and photothermal characteristics. The superhydrophobic coating delays icing about four times longer than the original coating. At ambient temperatures of −20 °C, the coating stacked with an electro- and photo-thermal performance de-icing layer reduces the de-icing time by about 5 times more than the purely photo-thermal performance de-icing time, and reduces the de-icing time by about 4 times more than the purely electro-thermal de-icing time. Furthermore, the EPS surface demonstrates the capability to sustain temperatures above 0 °C through the photothermal effect on sunny days, utilizing both the electrothermal and photothermal effects on cloudy days, and relying on the electrothermal effect during cold nights. The research introduces a novel method for fabricating functional materials, pertinent to practical anti-icing and de-icing applications.
研究领域:
材料科学
·
表面工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Tonghui Lu,Xianglin Li,Mengying Lu,Wenhao Lv,Wenzhuo Liu,Xuanchen Dong,Zhe Liu,Shangzhen Xie,Song Lv
Anti-icing and de-icing are vital for infrastructure maintenance. While carbon-based materials with photothermal or electrothermal effects have advanced, they face challenges like environmental dependence, poor resistance, high energy consumption, and complex manufacturing. Here, we developed a scalable, hybrid metamaterial driven by photothermal/electrothermal for all-weather anti-icing/de-icing. Its nanostructured surface delays icing by 360 s at −30°C, breaking records across a wide temperature range. The porous structure enhances light absorption, achieving a delayed icing time of 2500 s at −20°C under one sunlight. The graphene film’s high conductivity allows rapid de-icing with 1.6W power. After 720 h of outdoor exposure, the metamaterial retained a contact angle above 150°, confirming durability. More critically, we have demonstrated that the metamaterial can be manufactured on a large scale, which is essential for improving the economics of the anti-icing/de-icing sector.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xiao-Dong Jian,Biao Lu,Dan-Dan Li,Ying-Bang Yao,Tao Tao,Bo Liang,Jin-Hong Guo,Yi-Jiang Zeng,Jia-Le Chen,Sheng-Guo Lu
Barium zirconate titanate (BZT) (Ba(ZrxTi1–x)O3) ceramics with Zr4+ contents of x = 5, 10, 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. The microstructures, morphologies, and electric properties were characterized using X-ray diffraction, scanning electron microscopy, and impedance analysis methods, respectively. The dielectric analyses indicate that the BZT bulk ceramics show characteristics of phase transition from a normal ferroelectric to a relaxor ferroelectric with the increasing Zr4+ ionic content. The electrocaloric effect adiabatic temperature change decreases with the increasing Zr4+ content. The highest adiabatic temperature change obtained is 2.4 K for BZT ceramics with a 5 mol % of Zr4+ ionic content.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Sheng-Guo Lu,Xiongwei Lin,Jiang Li,Dandan Li,Yingbang Yao,Tao Tao,Bo Liang
The electrocaloric effect (ECE) in lead-free (Ba 1−x Sr x )(Sn 0.05 Ti 0.95 )O 3 (BSSnT) (x = 0.05, 0.10, 0.15, 0.20) ceramics were investigated around room temperature using direct and indirect approaches. Results indicate that the maximum ECE occurs near the Curie temperature and slightly shifts towards high temperatures with the increasing applied electric field. The directly measured ECE is larger than that calculated using the Maxwell relation. The maximum electrocaloric strength ΔT/ΔE = 0.52 × 10 −6 K m/V was obtained at T = 36 °C, with an adiabatic ΔT of 1.05 °C at 2 MV m −1 . An analytic formula of electrocaloric strength (dT/dE) was deduced, via which the maximum dT/dE was estimated. The factors affecting the electrocaloric strength were discussed, and the experimental results were compared with those derived from the formula.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yidan Zhang,Zhiguang Guo
Multifunctional wearable textiles can simulate human perception and convert it into visual data, which has advanced application prospects. As an important branch, thermal management wearable textiles have been widely concerned in the aspects of thermal insulation, flame retardant, photothermal anti-icing, electrothermal deicing and even water evaporation. Here, inspired by the bearing structure, we simply soaked the PET textile in Ag@MXene hybrid solution several times to form a Ag@MXene conductive network with Ag NPs as the connection point on the textile fiber, and finally carry out hydrophobic modification. Based on plasma effect, the synergistic action of Ag NPs and MXene enhances the photothermal response of the material. In addition, the addition of Ag NPs effectively reduces the stacking between MXene layers and forms a Ag@MXene conductive network with Ag NPs as the connection point on the textile fibers. The stable temperature range of PDMS/Ag@MXene PET textile is 70–80 °C under one solar illumination intensity, and the stable temperature of PDMS/Ag@MXene PET textile can reach 117 °C at a constant voltage of 3 V. Based on the excellent thermal effect, this textile achieves photothermal anti-icing, electric thermal de-icing, keeping warm and removing sweat. The textile has a water evaporation efficiency of about 0.58 g h −1 , which can achieve excellent anti-sweat function. Finally, the textile also achieved rapid flame retardant within 7 s. PDMS/Ag@MXene PET textile processes excellent photothermal and electrothermal conversion ability, acid/water stability and flame retardant ability, and has promising application prospects in thermal management textiles such as deicing and anti-icing, fire prevention, warmth and water evaporation.
研究领域:
材料科学
·
纺织工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Kunquan Li,Jiamin Xiang,Jiale Zhou,Xiaojing Su,Huali Xie,Shaoze Lin,Zihao Xiao,Weijun Huang,Chongrui Zhao,Huiru Chen,Wenjian Wu
Superhydrophobic material has great potential applications in the field of anti-icing due to its special wettability . However, the poor wear resistance of the material has restricted its practical applications. Based on this, a simple two-step spray method was used to prepare a self-healing and robust superhydrophobic coating with excellent photothermal/electrothermal effect for anti-icing using epoxy modified ethylene octene copolymer (POEG) resin as the substrate layer and the fluorinated carbon black as the top coating. Results showed that the obtained composite coating showed multi-level rough structure and possessed excellent superhydrophobicity toward water droplets with different pH. Meanwhile, the composite coating could resist abrasion and kept superhydropbobicity even 250 cycles abrasion test with a water contact angle higher than 150 o . When the surface was subjected to the intense abrasion, the rough structure and the superhydrophobic property of the surface were destroyed. However, it could be restored by the abrasion of the rougher surface. In addition, the scratches on the surface could be completely repaired by the heat treatment, indicating the good self-healing performance of the composite coating. Due to the existence of the carbon black particles, the superhydrophobic coating had good photothermal/electrothermal effects, which endowed the surface with excellent anti-icing performance of removing the icing under the conditions of electrothermal and light. This paper provides a simple and convenient way to prepare functional self-healing superhydrophobic coating, and a new idea for the preparation of anti-icing coating.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 11
·1777-1788
·
IF 11.534
Niu Xiang,Jian Xiaodong,Gong Weiping,Liang Wei,Gong Xuetian,Zhang Guangzu,Jiang Shenglin,Yu Kun,Zhao Xiaobo,Yao Yingbang,Tao Tao,Liang Bo,Lu Sheng-Guo
Solid-state cooling technology based on electrocaloric effect (ECE) has been advanced as an alternative to replace the vapour-compression approach to overcome the releasing of the global warming gases. However, the development in high ECE materials is still a challenge. In this work, polarization merging strategy was proposed to achieve a large ECE in x Ba(Sn 0.07 Ti 0.93 )O 3 -( 1 − x )Ba(Hf 0.1 Ti 0.9 )O 3 ferroelectric ceramics, where x = 0, 0.2, 0.4, 0.6, 0.8, and 1. Ba(Sn 0.07 Ti 0.93 )O 3 with an orthorhombic phase and Ba(Hf 0.1 Ti 0.9 )O 3 with a rhombohedral phase at room temperature were prepared beforehand as precursors, and phase-coexisted x BSnT-(1− x )BHfT ceramics were formed via a solid-state reaction approach. Phase coexisting structures were confirmed using the X-ray diffraction. The merged polarization was confirmed by the dielectric and ferroelectric properties. Optimal ECEs were obtained for 0.2BSnT-0.8BHfT ceramics, i.e., adiabatic temperature change Δ T = 2.16±0.08 K at 80 °C and 5 MV/m, and Δ T = 3.35±0.09 K at 80 °C and 7 MV/m.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）