scholarly journals Lead-Free LiNbO3 Thick Film MEMS Kinetic Cantilever Beam Sensor/Energy Harvester

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 559
Author(s):  
Gabriel Barrientos ◽  
Giacomo Clementi ◽  
Carlo Trigona ◽  
Merieme Ouhabaz ◽  
Ludovic Gauthier-Manuel ◽  
...  
Keyword(s):  
Electrical Energy ◽  
Open Circuit ◽  
Fabrication Process ◽  
Lead Free ◽  
Electromechanical Transduction ◽  
Mems Fabrication ◽  
Circuit Output ◽  
Theoretical Considerations ◽  
Modelling Simulation

In this paper, we present integrated lead-free energy converters based on a suitable MEMS fabrication process with an embedded layer of LiNbO3. The fabrication technology has been developed to realize micromachined self-generating transducers to convert kinetic energy into electrical energy. The process proposed presents several interesting features with the possibility of realizing smaller scale devices, integrated systems, miniaturized mechanical and electromechanical sensors, and transducers with an active layer used as the main conversion element. When the system is fabricated in the typical cantilever configuration, it can produce a peak-to-peak open-circuit output voltage of 0.208 V, due to flexural deformation, and a power density of 1.9 nW·mm−3·g−2 at resonance, with values of acceleration and frequency of 2.4 g and 4096 Hz, respectively. The electromechanical transduction capability is exploited for sensing and power generation/energy harvesting applications. Theoretical considerations, simulations, numerical analyses, and experiments are presented to show the proposed LiNbO3-based MEMS fabrication process suitability. This paper presents substantial contributions to the state-of-the-art, proposing an integral solution regarding the design, modelling, simulation, realization, and characterization of a novel transducer.

scholarly journals The Improvement of Performance through Minimizing Scallop Size in MEMS Based Micro Wind Turbine

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1261
Author(s):  
Young Chan Choi ◽  
June Soo Kim ◽  
Soon Yeol Kwon ◽  
Seong Ho Kong
Keyword(s):  
Wind Turbine ◽  
Permanent Magnets ◽  
Surface Profile ◽  
Open Circuit ◽  
Micro Electro Mechanical Systems ◽  
Deep Reactive Ion Etching ◽  
Mems Fabrication ◽  
Mems Technology ◽  
Etching Profile ◽  
Circuit Output

In this paper we report on the improvement of performance by minimizing scallop size through deep reactive-ion etching (DRIE) of rotors in micro-wind turbines based on micro-electro-mechanical systems (MEMS) technology. The surface profile of an MEMS rotor can be controlled by modifying the scallop size of the DRIE surface through changing the process recipe. The fabrication of a planar disk-type MEMS rotor through the MEMS fabrication process was carried out, and for the comparison of the improvements in the performance of each rotor, RPM testing and open circuit output voltage experiments of stators and permanent magnets were performed. We found that the smooth etching profile with a minimized scallop size formed using DRIE results in improved rotation properties in MEMS-based wind turbine rotors.

A Test IC for Wafer-Level Characterization of an IntraCMOS-MEMS Fabrication Process

2022 ◽  
Vol 20 (1) ◽  
pp. 108-116
Author(s):  
Monico Linares Aranda ◽  
Luis Hernandez Martinez ◽  
Javier De la Hidalga Wade
Keyword(s):  
Fabrication Process ◽  
Wafer Level ◽  
Mems Fabrication

Characterization of some Lead-Free Bronzes

2013 ◽  
Vol 50 (3) ◽  
pp. 177-195
Author(s):  
D. Živković ◽  
A. Mitovski ◽  
S. Novaković ◽  
Lj. Balanović ◽  
D. Marković ◽  
...  
Keyword(s):  
Lead Free

scholarly journals Spray‐coated lead‐free Cs 2 AgBiBr 6 double perovskite solar cells with high open‐circuit voltage

Solar RRL ◽  
2021 ◽  
Author(s):  
Nathan Daem ◽  
Jennifer Dewalque ◽  
Felix Lang ◽  
Anthony Maho ◽  
Gilles Spronck ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Double Perovskite ◽  
Open Circuit ◽  
Lead Free

Synthesis, structural and dielectric characterization of lead free x[(Ba0.7Ca0.3)TiO3]–(1 − x)[Ba(Zr0.2Ti0.8)O3] composite

2016 ◽  
Vol 27 (7) ◽  
pp. 7204-7210 ◽  
Author(s):  
S. M. Mane ◽  
P. M. Tirmali ◽  
D. J. Salunkhe ◽  
P. B. Joshi ◽  
C. B. Kolekar ◽  
...  
Keyword(s):  
Lead Free ◽  
Dielectric Characterization

scholarly journals Specific Electrical Energy Consumption and CO2 Emissions Assessment of Agrifood Industries in the Central Region of Portugal

2014 ◽  
Vol 675-677 ◽  
pp. 1880-1886 ◽  
Author(s):  
Pedro D. Silva ◽  
Pedro Dinis Gaspar ◽  
J. Nunes ◽  
L.P.A Andrade
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Food Safety ◽  
Central Region ◽  
Electrical Energy ◽  
Electrical Energy Consumption ◽  
Reference Levels ◽  
Energy Characteristics ◽  
Result Analysis

This paper provides a characterization of the electrical energy consumption of agrifood industries located in the central region of Portugal that use refrigeration systems to ensure the food safety. The study is based on the result analysis of survey data and energy characteristics of the participating companies belonging to the following agrifood sectors: meat, dairy, horticultural, distribution and wine. Through the quantification of energy consumption of companies is possible to determine the amount of greenhouse gases (GHGs) emissions indexed to its manufacturing process. Comparing the energy and GHGs emissions indexes of companies of a sector and between sectors is possible to create reference levels. With the results of this work is possible to rating the companies in relation to reference levels of energy and GHGs emissions and thus promote the rational use of energy by the application of practice measures for the improvement of the energy efficiency and the reduction of GHGs emissions.

Application of Electrochemical Techniques to Characterization of the Corrosion Behaviors of GW63 Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 571-574
Author(s):  
Xing Wu Guo ◽  
Jian Wei Chang ◽  
Shang Ming He ◽  
Peng Huai Fu ◽  
Wen Jiang Ding
Keyword(s):  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Cyclic Polarization ◽  
Time Curve ◽  
Completely Monotonic ◽  
Treatment Conditions ◽  
Impedance Variation ◽  
Corrosion Behaviors

The corrosion behavior of GW63 (Mg-6wt.%Gd-3wt.%Y-0.4wt.%Zr) alloys in 5% NaCl aqueous solution has been investigated by PARSTAT 2273 instrument. The Open Circuit Potential (ECORR) vs. time curve, cyclic polarization (Pitting Scans) curve and Electrochemical Impedance Spectroscopy (EIS) was measured for the GW63 alloys in as-cast and T6 heat treatment conditions. The EIS results indicated that the tendency of impedance variation for as-cast condition was monotonic decreasing, however, the tendency of variation for T6 condition was not completely monotonic but the total tendency was decreasing. The values of impedance of GW63 alloy at 0.1 Hz are about 103 ohm-cm2 for as-cast and T6 condition.

Piezoelectric T-Beam Microactuators

2008 ◽  
Author(s):  
Hareesh K. R. Kommepalli ◽  
Andrew D. Hirsh ◽  
Christopher D. Rahn ◽  
Srinivas A. Tadigadapa
Keyword(s):  
Cross Section ◽  
Fabrication Process ◽  
Mems Fabrication ◽  
Out Of Plane ◽  
Cantilevered Beam ◽  
Piezoelectric Mems ◽  
The Cross ◽  
T Beam ◽  
Cross Section Geometry

This paper introduces a novel T-beam actuator fabricated by a piezoelectric MEMS fabrication process. ICP-RIE etching from the front and back of a bulk PZT chip is used to produce stair stepped structures through the thickness with complex inplane shapes. Masked electrode deposition creates active and passive regions in the PZT structure. With a T-shaped crosssection, and bottom and top flange and web electrodes, a cantilevered beam can bend in-plane and out-of-plane with bimorph actuation in both directions. One of these T-beam actuators is fabricated and experimentally tested. An experimentally validated model predicts that the cross-section geometry can be optimized to produce higher displacement and blocking force.

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