scholarly journals Anchor loss dependence on electrode materials in contour mode resonators

2016 ◽  
Author(s):  
Andrea Lozzi ◽  
Luis Guillermo Villanueva ◽  
Ernest Ting-Ta Yen
Keyword(s):  
Electrode Materials ◽  
Contour Mode ◽  
Anchor Loss

scholarly journals The impact of electrode materials on 1/f noise in piezoelectric AlN contour mode resonators

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 055009 ◽  
Author(s):  
Hoe Joon Kim ◽  
Soon In Jung ◽  
Jeronimo Segovia-Fernandez ◽  
Gianluca Piazza
Keyword(s):  
Electrode Materials ◽  
Contour Mode ◽  
The Impact

scholarly journals Engineered acoustic mismatch for anchor loss control in contour mode resonators

2019 ◽  
Vol 114 (10) ◽  
pp. 103502 ◽  
Author(s):  
Andrea Lozzi ◽  
Annalisa De Pastina ◽  
Ernest Ting-Ta Yen ◽  
Luis Guillermo Villanueva
Keyword(s):  
Acoustic Mismatch ◽  
Loss Control ◽  
Contour Mode ◽  
Anchor Loss

Anchor Loss Calculation for Ring Shape Anchored Contour Mode Disk Resonators

2018 ◽  
Vol 23 (No 3, September 2018) ◽  
pp. 321-326
Author(s):  
Masoud Baghelani
Keyword(s):  
Quality Factor ◽  
Rf Mems ◽  
Loss Mechanism ◽  
Disk Resonators ◽  
Ring Shape ◽  
Mems Resonators ◽  
Acceptable Quality ◽  
Resonance Frequencies ◽  
Contour Mode ◽  
Anchor Loss

Miniaturization is the most sophisticated method for achieving UHF and SHF resonance frequencies in RF MEMS resonators. However, by reducing the dimensions of the resonators, the size of their supports become more comparable with the size of the resonator and anchor loss becomes the dominant loss mechanism, thereby suppressing the quality factor. This study considers, Ring Shape Anchored Contour Mode Disk Resonator and calculates anchor loss effects using both energy loss and acoustic impedance ratio methods. Results of analytical calculations are verified using finite element harmonic analysis. Simulation results show that RSACMDRs have an acceptable quality factor in comparison with the other state-of-the-art resonators.

A novel ligand with –NH2 and –COOH-decorated Co/Fe-based oxide for an efficient overall water splitting: dual modulation roles of active sites and local electronic structure

2020 ◽  
Vol 10 (18) ◽  
pp. 6266-6273
Author(s):  
Yalan Zhang ◽  
Zebin Yu ◽  
Ronghua Jiang ◽  
Jung Huang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Splitting ◽  
Energy Demand ◽  
Active Sites ◽  
Electrode Materials ◽  
Global Energy ◽  
Overall Water Splitting ◽  
Local Electronic Structure ◽  
Electrochemical Water Splitting

Excellent electrochemical water splitting with remarkable durability can provide a solution to satisfy the increasing global energy demand in which the electrode materials play an important role.

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

SYNTHESIS OF HYDROGEN IN ACOUSTOPLASMA DISCHARGE IN A LIQUID-PHASE STREAM

2019 ◽  
pp. 42-48 ◽  
Author(s):  
N. A. Bulychev
Keyword(s):  
Liquid Phase ◽  
Organic Compounds ◽  
Electrode Materials ◽  
Solid Phase ◽  
Plasma Discharge ◽  
Raw Material ◽  
Two Phase ◽  
Reduced Pressure ◽  
External Power Source ◽  
Phase Medium

In this paper, the plasma discharge in a high-pressure fluid stream in order to produce gaseous hydrogen was studied. Methods and equipment have been developed for the excitation of a plasma discharge in a stream of liquid medium. The fluid flow under excessive pressure is directed to a hydrodynamic emitter located at the reactor inlet where a supersonic two-phase vapor-liquid flow under reduced pressure is formed in the liquid due to the pressure drop and decrease in the flow enthalpy. Electrodes are located in the reactor where an electric field is created using an external power source (the strength of the field exceeds the breakdown threshold of this two-phase medium) leading to theinitiation of a low-temperature glow quasi-stationary plasma discharge.A theoretical estimation of the parameters of this type of discharge has been carried out. It is shown that the lowtemperature plasma initiated under the flow conditions of a liquid-phase medium in the discharge gap between the electrodes can effectively decompose the hydrogen-containing molecules of organic compounds in a liquid with the formation of gaseous products where the content of hydrogen is more than 90%. In the process simulation, theoretical calculations of the voltage and discharge current were also made which are in good agreement with the experimental data. The reaction unit used in the experiments was of a volume of 50 ml and reaction capacity appeared to be about 1.5 liters of hydrogen per minute when using a mixture of oxygen-containing organic compounds as a raw material. During their decomposition in plasma, solid-phase products are also formed in insignificant amounts: carbon nanoparticles and oxide nanoparticles of discharge electrode materials.

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