气候变化领域集成服务门户(CCPortal): Flexible and active self-powered pressure, shear sensors based on freeze casting ceramic-polymer composites

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DOI	10.1039/c8ee01551a
	Flexible and active self-powered pressure, shear sensors based on freeze casting ceramic-polymer composites
	Xie M.; Zhang Y.; Kraśny M.J.; Bowen C.; Khanbareh H.; Gathercole N.
发表日期	2018
ISSN	17545692
起始页码	2919
结束页码	2927
卷号	11 期号:10
英文摘要	Self-powered flexible electronics are of particular interest and important for next generation electronics due to their light weight, flexible and self-sustainable properties. Many self-powered sensors made from piezoelectric composite materials are either inflexible or possess low piezoelectricity. In this work, we demonstrate self-powered flexible and highly active pressure and shear sensors based on freeze casting ceramic-polymer structures. A lamellar lead zirconate titanate (PZT) structure is initially developed via freeze-casting and the piezoelectric composites are formed by impregnating a polydimethylsiloxane (PDMS) matrix into the aligned pore channels. The structured PZT-PDMS composites exhibited a high effective longitudinal piezoelectric coefficient (d33∗) of 750 pC N-1, which is higher than that of the monolithic ceramic due to the combination of bending and flexural effects. The use of freeze casting enables the manufacture of complex and arbitrary shaped 3D piezoelectric architectures, along with the unique advantages of low-cost and ease of fabrication. A 14 × 14 mm2 PZT-PDMS pressure sensor was able to bend to a small radius of 8 mm and maintain a high d33. Furthermore, the manufactured self-powered sensors are demonstrated in a range of applications, such as acceleration, strain and touch sensors that use the d33, d31 and d15 coefficients to detect longitudinal, transverse and shear loads. This work expands on the potential applications of freeze casting and provides new opportunities for the manufacture of future electronic sensors. © 2018 The Royal Society of Chemistry.
英文关键词	Ceramic materials; Composite materials; Crystallography; Ferroelectric ceramics; Lead zirconate titanate; Manufacture; Microchannels; Piezoelectric materials; Piezoelectricity; Polydimethylsiloxane; Silicones; Ceramic-polymer composites; Electronic sensors; Monolithic ceramics; Piezoelectric coefficient; Piezoelectric composite; Piezoelectric composite materials; Polydimethylsiloxane PDMS; Self-sustainable; Flexible electronics; ceramics; composite; electronic equipment; piezoelectricity; polymer; sensor
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190096
作者单位	Department of Mechanical Engineering, University of BathBA2 7AY, United Kingdom; State Key Laboratory of Powder Metallurgy, Central South University410083, China
推荐引用方式 GB/T 7714	Xie M.,Zhang Y.,Kraśny M.J.,et al. Flexible and active self-powered pressure, shear sensors based on freeze casting ceramic-polymer composites[J],2018,11(10).
APA	Xie M.,Zhang Y.,Kraśny M.J.,Bowen C.,Khanbareh H.,&Gathercole N..(2018).Flexible and active self-powered pressure, shear sensors based on freeze casting ceramic-polymer composites.Energy & Environmental Science,11(10).
MLA	Xie M.,et al."Flexible and active self-powered pressure, shear sensors based on freeze casting ceramic-polymer composites".Energy & Environmental Science 11.10(2018).