Piezoelectricity - Organic and Inorganic Materials and Applications最新文献

Piezoelectric Materials for Medical Applications 医用压电材料

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.76963

Melodie Chen-Glasser, Panpan Li, Jeongjae Ryu, Seungbum Hong

引用次数: 16

Piezoelectric Vibration Energy Harvester Using Polyvinylidene Difluoride Film Formed by Bar-Coating Method and Its Spray- Coating Method on a Three Dimensional Surface 采用棒状涂膜法和喷涂法在三维表面上形成聚偏二氟乙烯薄膜的压电振动能量采集器

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.79192

Hiroki Takise, Masato Suzuki, Tomokazu Takahashi, S. Aoyagi

{"title":"Piezoelectric Vibration Energy Harvester Using Polyvinylidene Difluoride Film Formed by Bar-Coating Method and Its Spray- Coating Method on a Three Dimensional Surface","authors":"Hiroki Takise, Masato Suzuki, Tomokazu Takahashi, S. Aoyagi","doi":"10.5772/INTECHOPEN.79192","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.79192","url":null,"abstract":"the Abstract A cantilever-type vibration energy harvester (VEH) made of polyvinylidene difluoride (PVDF) was fabricated and characterized. PVDF is one of the polymer piezoelectric materials, which is more flexible than ceramic-based piezoelectric materials such as lead zirconate titanate (PZT). The fabrication process of VEH is as follows: a PVDF film was coated on a phosphor bronze plate by bar-coating method, followed by polarization by corona discharge method. Aluminum top electrode was deposited on the PVDF film by sputtering. One end of the plate was clamped by a fixture to form a cantilever, the length of which is 25 mm. Output power P at the resonance frequency (=55 Hz) was measured as a function of load resistance R with the acceleration set at 17 m/s 2 . Maximum output reached 4.3 μW at R = 2.1 MΩ. This result is not inferior compared with other reported VEHs using ceramic piezoelectric material. Spray coating was carried out to form PVDF film on a 3D surface. This method is suitable for fabricating a uniform thin film on a three-dimensional (3D) surface, even if it is complicatedly curved. In this study, PVDF film was formed on a 3D helical compressing spring, and the deposition on it was suc cessfully achieved.","PeriodicalId":302162,"journal":{"name":"Piezoelectricity - Organic and Inorganic Materials and Applications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131027548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Thin Piezoelectric Films in Diamond-Based Acoustoelectronic Devices 压电薄膜在金刚石基声电子器件中的应用

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.76715

B. Sorokin, G. Kvashnin, A. S. Novoselov, S. Burkov, A. B. Shipilov, N. Luparev, Victor V.Aksenenkov, V. Blank

{"title":"Application of Thin Piezoelectric Films in Diamond-Based Acoustoelectronic Devices","authors":"B. Sorokin, G. Kvashnin, A. S. Novoselov, S. Burkov, A. B. Shipilov, N. Luparev, Victor V.Aksenenkov, V. Blank","doi":"10.5772/INTECHOPEN.76715","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.76715","url":null,"abstract":"The theory of external loading influence on acoustic parameters of piezoelectric fivelayered structure as “Al/(001) AlN/Mo/(001) diamond/Me” has been developed. Oscillations in diamond-based high-overtone bulk acoustic resonators (HBARs) have been investigated in terms of 3D FEM simulation. Peculiarities of technology of aluminum-scandium nitride (ASN) films have been discussed. Composition Al0.8Sc0.2N was obtained to create the diamond-based HBAR and SAWresonator. Application of ASN films has resulted in a drastic increasing an electromechanical coupling up to 2.5 times in comparison with aluminum nitride. Development of ASN technology in a way of producing a number of compositions with the better piezoelectric properties has a clear prospective. SAWresonator based on “Al IDT/(001) AlN/(001) diamond” structure has been investigated in the band 400–1500 MHz. The highest-quality factor Q ≈ 1050 was observed for the Sezawa mode at 1412 MHz. Method of measuring HBAR’s parameters within 4–400 K at 0.5–5 GHz has been developed. Results on temperature dependence of diamond’s Qfactor at relatively low frequencies were quite different in comparison with the ones at the frequencies up to 5 GHz. Difference could be explained in terms of changing mechanism of acoustic attenuation from Akhiezer’s type to the Landau-Rumer’s one at higher frequencies in diamond.","PeriodicalId":302162,"journal":{"name":"Piezoelectricity - Organic and Inorganic Materials and Applications","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115024359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Nanocellulose as a Piezoelectric Material 纳米纤维素作为压电材料

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.77025

S. Tuukkanen, S. Rajala

引用次数: 11

Piezoelectric Melt-Spun Textile Fibers: Technological Overview 压电熔纺纺织纤维:技术综述

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.78389

D. Matsouka, S. Vassiliadis

{"title":"Piezoelectric Melt-Spun Textile Fibers: Technological Overview","authors":"D. Matsouka, S. Vassiliadis","doi":"10.5772/INTECHOPEN.78389","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.78389","url":null,"abstract":"Piezoelectricity was first described by the Curie brothers in the late 1800s. The first mate - rials investigated were natural materials such as bone and wood and single crystals such as quartz. Then in 1946 it was discovered that BaTiO 3 ceramic can be made piezoelectric through a poling process. This was followed by the discovery of lead zirconate titanate solid solutions (PZT) in 1954 of very strong lead effects which is still widely used in piezoelectric applications. In 1969, Kawai discovered large piezoelectricity in elongated and poled films of polyvinylidene fluoride (PVDF) opening the way for research into piezoelectric polymers. Piezoelectric polymers exhibit low density and excellent sensi tivity and are mechanically tough and respond better to fatigue situations. Since 2010, research has focused on the production of melt-spun piezoelectric textile fibers, with the aim of integrating sensing/energy-harvesting capabilities into smart textile structures. In this chapter, a technological overview of the state-of-the-art research into piezoelectric, melt-spun, textile fibers will be presented. The methods used for the characterization of the fibers will also be discussed with special concentration on the electric response of the fibers after mechanical stimulation.","PeriodicalId":302162,"journal":{"name":"Piezoelectricity - Organic and Inorganic Materials and Applications","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130971237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hydrodynamic Loading on Vibrating Piezoelectric Microresonators 振动压电微谐振器的水动力载荷

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.77731

H. Qiu, H. Seidel

引用次数: 4

Piezoelectric Sensors Used for Daily Life Monitoring 用于日常生活监测的压电传感器

Piezoelectricity - Organic and Inorganic Materials and Applications Pub Date : 2018-08-29 DOI: 10.5772/INTECHOPEN.77724

H. Madokoro

{"title":"Piezoelectric Sensors Used for Daily Life Monitoring","authors":"H. Madokoro","doi":"10.5772/INTECHOPEN.77724","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.77724","url":null,"abstract":"This chapter presents an unrestrained and predictive sensor system to analyze human behavior patterns, especially in a case that occurs when a patient leaves a bed. Our developed prototype system comprises three sensors: a pad sensor, a pillow sensor, and a bolt sensor. A triaxial accelerometer is used for the pillow sensor, and piezoelectric elements are used for the pad sensors and the bolt sensor that were installed under a bed mat and a bed handrail, respectively. The noteworthy features of these sensors are their easy installation, low cost, high reliability, and toughness. We developed a machine-learning-based method to recognize bed-leaving behavior patterns obtained from sensor signals. Our prototype system was evaluated by the examination with 10 subjects in an environment representing a clinical site. The experimentally obtained result revealed that the mean recognition accuracy for seven behavior patterns was 75.5%. Particularly, the recognition accuracies for longitudinal sitting, terminal sitting, and left the bed were 83.3, 98.3, and 95.0%, respectively. However, falsely recognized patterns remained inside of respective behavior categories of sleeping and sitting. Our prototype system is applicable and used for an actual environment as a novel sensor system without restraint for patients.","PeriodicalId":302162,"journal":{"name":"Piezoelectricity - Organic and Inorganic Materials and Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132020445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2