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Metals
Special Issues
Piezoelectric Materials and Applications
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Piezoelectric Materials and Applications

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 October 2017) | Viewed by 13388

Special Issue Editor

Prof. Dr. Jung-Hyuk Koh

E-Mail Website
Guest Editor
Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, Korea
Interests: CO2 laser annealing; RTA; TCO; ZnO-based

Special Issue Information

Dear Colleagues,

In this Special Issue, we hope that various kinds of lead or lead-free piezoelectric materials, and their recent applications, will be introduced. In addition, composited materials, such as PVDF, will be welcomed and introduced for future applications.

Recent research on energy harvestings, based on piezoelectric materials and their structures, will be favorable applications for future, self-powered device applications. Therefore, we sincerely hope to have open space for piezoelectric research by preparing recent research on these ‘piezoelectric materials and applications’ issues.

Prof. Jung-Hyuk Koh
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • lead based piezoelectric materials
  • lead-free piezoelectric materials
  • composite materials
  • energy harvesters
  • sensors and actuators
  • functional applications

Published Papers (2 papers)

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Research

10241 KiB  
Article
A Novel Hybrid Actuator Driven Magnetically in the Bi-Cell PEM Fuel Cell Stack
by Hsiaokang Ma, Yuanlung Hsu and Poching Hsu
Metals 2017, 7(11), 453; https://doi.org/10.3390/met7110453 - 26 Oct 2017
Cited by 2 | Viewed by 5694
Abstract
This study develops an air breathing pump driven by a piezoelectric actuator for a proton exchange membrane fuel cell (PEMFC) stack. Permanent magnets are combined with a piezoelectric actuator to drive three air breathing pumps using magnetic force. This design enables the pump [...] Read more.
This study develops an air breathing pump driven by a piezoelectric actuator for a proton exchange membrane fuel cell (PEMFC) stack. Permanent magnets are combined with a piezoelectric actuator to drive three air breathing pumps using magnetic force. This design enables the pump to provide a sufficient amount of air simultaneously to six cathode flow field plates in a stack of three “bi-cell PZTmag–PEMFCs”. When both the PZTmag and the PDMSmag had a magnet with a 6-mm diameter and 1-mm thickness, a maximum amplitude of 87 μm was generated at 0.03 W of power under operating conditions of 70 Hz and 40 V. In computational fluid dynamics (CFD), when the nozzle and the diffuser of an air breathing pump have an aspect ratio of 13.13, air flow distributes uniformly inside the pump, thus allowing for uniform transmission of oxygen to the membrane electrode assembly. This aspect ratio was applied to the bi-cell PZTmag–PEMFC stack and yielded a maximum net power flux of 0.1925 W·cm−2, 20% higher than that reported in a previous study (Ma, 2013), with 68% and 76% less volume and weight, respectively. Full article
(This article belongs to the Special Issue Piezoelectric Materials and Applications)
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3390 KiB  
Article
Pyroelectrically Induced Pyro-Electro-Chemical Catalytic Activity of BaTiO3 Nanofibers under Room-Temperature Cold–Hot Cycle Excitations
by Yuntao Xia, Yanmin Jia, Weiqi Qian, Xiaoli Xu, Zheng Wu, Zichen Han, Yuanting Hong, Huilin You, Muhammad Ismail, Ge Bai and Liwei Wang
Metals 2017, 7(4), 122; https://doi.org/10.3390/met7040122 - 01 Apr 2017
Cited by 70 | Viewed by 7112
Abstract
A pyro-electro-chemical catalytic dye decomposition using lead-free BaTiO3 nanofibers was realized under room-temperature cold–hot cycle excitation (30–47 °C) with a high Rhodamine B (RhB) decomposition efficiency ~99%, which should be ascribed to the product of pyro-electric effect and electrochemical redox reaction. Furthermore, [...] Read more.
A pyro-electro-chemical catalytic dye decomposition using lead-free BaTiO3 nanofibers was realized under room-temperature cold–hot cycle excitation (30–47 °C) with a high Rhodamine B (RhB) decomposition efficiency ~99%, which should be ascribed to the product of pyro-electric effect and electrochemical redox reaction. Furthermore, the existence of intermediate product of hydroxyl radical in pyro-electro-chemical catalytic process was also observed. There is no significant decrease in pyro-electro-chemical catalysis activity after being recycled five times. The pyro-electrically induced pyro-electro-chemical catalysis provides a high-efficient, reusable and environmentally friendly technology to remove organic pollutants from water. Full article
(This article belongs to the Special Issue Piezoelectric Materials and Applications)
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