Design and Simulation of MEMS Based Piezoelectric Shear Actuated Beam

Abstract

Now-a-days, there has been growing demand for the development of micro scale devices, due to its less cost, space requirements, high dimensional stability and especially manufacturing time. This paper reports the modeling of MEMS based Piezoelectric shear actuated beam by using COMSOL Multiphysics software of version 4.2a.The dimensions of the model beam is of 100-mm long, 30-mm width, 10-mm thickness. In this paper, we analysed the deflection of beam under different voltages. In the first step, deflection of beam is analysed by changing the material of sandwiched beam. In the second step deflection of beam is explored by changing material of electrodes. In the third step, deflection of beam is analysed by changing both materials of sandwiched beam and electrodes. In the final step defection of beam is explored by changing both thickness and material of electrodes. Finally, the results of analysis allowed to conclude us to design a piezo electric shear actuated beam with different ranges and resolutions, under the condition of changing both thickness and material of electrodes gives the optimum deflection of 216nm under 30v excited input voltage.

Selective hydrogenation of phenol and related derivatives

“…69 The differences in catalytic activity and selectivity to cyclohexanone between Pt-Cr/C and Pt-V/C can be ascribed to the degree of metal-metal interaction between the platinum and the alloying element. 19,70 Keane and group members reported that Pd-Yb/SiO 2 , derived from the cyanide bridged lanthanide palladium complex {(DMF) 10 Yb 2 [Pd(CN) 4 ] 3 } ∞ , exhibits a higher phenol conversion and overall yield of cyclohexanone than Pd/SiO 2 . 34 The promotion effect of the Yb is ascribed to electron donation from the strongly electropositive Yb that activates the reactant.…”

“…The authors ascribed this to both the effect of the crystallite size and the promotion effect of alloy ensembles. 19 Chen et al proved a decrease in TOF with increasing the Pd loading over Pd/MgAl-CHT. 50 Velu et al observed that the TOF increases with decreasing the Pd loading and crystallite size of Pd/CeO 2 -MS. 77 Li found that the TOF increases remarkably with the increase of the atomic ratio of La/Pd from 0.05 to 5 over Pd/La x -Al 2 O 3 .…”

“…[13][14][15][16] Therefore, the one-step process, the selective hydrogenation of phenol to cyclohexanone, has a large number of advantages. It simplifies the reaction steps, improves the efficiency of the hydrogen utilization, reduces waste disposal, 3,[17][18][19] and avoids the difficult separation of phenol-cyclohexanol and phenolcyclohexanone azeotropes. 20,21…”

Proposal for an electrostrictive logic device with the epitaxial oxide heterostructure

“…Indeed, we find that there is almost the negligible difference in simulation results between the two cases; the use of strain-charge physics generates slightly higher stress values than the stress-charge counterpart, but the overall trend remains the same. In the simulation, the substrate layer (silicon) was fixed and all other layers were allowed to experience volume expansion or contraction depending on the polarity of the gate voltage bias applied 21 – 23 . Electric potential was applied to the top surface of the BTO layer and its bottom surface was grounded to assume a full voltage drop across the piezoelectric layer (the simulated potential graph across the BTO layer is available in the Supplementary Information).…”

Oxidative Coupling of 2‐Methyl‐1‐naphthol: A Comparison between Bismuth‐Promoted Pt, Pd and Ag Catalysts

“…Noble metals have many applications in catalytic hydrogenation and oxidation reactions . Often an additional component (promoter) is used to improve the catalyst characteristics and to meet the requirements for a given transformation . Promoters can improve the catalyst selectivity, activity and/or stability .…”