Synthesis and Mechanical Characterization of Magnetic Hybrid Materials with PVB as Polymeric Matrix for Micro-Actuation Applications

2014 ◽  
Vol 1708 ◽  
Author(s):  
Beatriz López-Walle ◽  
Jesús Romo-Rico ◽  
Jesús Puente-Córdova ◽  
Martín Reyes-Melo
Keyword(s):  
Magnetic Field ◽  
Electric Power ◽  
Hybrid Materials ◽  
Mechanical Characterization ◽  
Polyvinyl Butyral ◽  
Variable Magnetic Field ◽  
Potential Applications ◽  
Micro Actuators ◽  
Maximal Displacement

ABSTRACTThis work presents two multifunctional magnetic hybrid materials with potential applications as micro-actuators. The first one consists of iron oxide (Fe2O3) nanoparticles embedded in polyvinyl butyral (PVB). For the second one, Fe2O3 nanoparticles, coated with carboxymethyl cellulose (CMC), were embedded in PVB. The main objective is to describe their synthesis and morphological and magnetic characterizations, and to evaluate their displacement against a variable magnetic field. The maximal displacement is obtained by the (Fe2O3-CMC)/PVB beam-shaped structure (28.37 x 2.6 x 0.183 mm3) with 843 μm; the maximal electric power being 1.14 W. The levels of displacement induced in both hybrid materials as a response of the external magnetic field, besides the low electric power required, let us conclude that the studied materials could be considered as good candidates to micro-actuators applications.

scholarly journals Development of an undulator with a variable magnetic field profile

2021 ◽  
Vol 28 (2) ◽  
pp. 404-409
Author(s):  
Takashi Tanaka ◽  
Yuichiro Kida ◽  
Ryota Kinjo ◽  
Tadashi Togashi ◽  
Hiromitsu Tomizawa ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Force ◽  
Mechanical Load ◽  
Magnetic Measurement ◽  
Variable Magnetic Field ◽  
Linear Actuator ◽  
Free Electron Lasers ◽  
Magnetic Field Profile ◽  
New Concepts

An undulator generating a magnetic field whose longitudinal profile is arbitrarily varied has been developed, which is one of the key components in a number of proposed new concepts in free-electron lasers. The undulator is composed of magnet modules, each of which corresponds to a single undulator period, and is driven by a linear actuator to change the magnetic gap independently. To relax the requirement on the actuator, the mechanical load on each module due to magnetic force acting from opponent and adjacent modules is reduced by means of two kinds of spring systems. The performance of the constructed undulator has been successfully demonstrated by magnetic measurement and characterization of synchrotron radiation.

scholarly journals Development and Morphological Characterization of Novel Polyimide/Metal nano Hybrid Materials

2019 ◽  
Vol 57 (2) ◽  
pp. 94-103
Author(s):  
Iuliana Stoica ◽  
Ion Sava ◽  
Georgiana Bulai ◽  
George Stoian ◽  
Mitachi Strat ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Hybrid Materials ◽  
Surface Characteristics ◽  
Morphological Characterization ◽  
Aromatic Diamine ◽  
Force Microscopy ◽  
Atomic Force ◽  
Thermal Imidization ◽  
Potential Applications

Two different polyimide structures were synthesized by two-step polycondensation reaction in solution, in the first step using equimolar amounts of one of two aromatic diamine (DDM or MMDA) and one dianhydride (6HDA) in N,N-dimethylacetamide (DMAc) to obtain the poly(amic acids), followed in the second step by thermal imidization. In order to obtain novel polyimide/metal nano hybrid materials, conductive Ni/Cu nanoparticles were embedded on polyimide substrates, using laser ablation technique. The morphology of the resulted thin metal layers was investigated using atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The results highlighted different surface characteristics of the auto-organized metallic/polymer nanoparticles, depending on the chemical structure of the polyimide substrate, the parameters of the laser ablation setup, the deposition time, the type of the metallic target. The obtained features of these polyimide/metal nano hybrid materials can be employed as an indicator of the possibility of using them for potential applications as conductive circuits or substrates for adhesion control.

Characterization of multiple carriers in GaN using variable magnetic-field hall measurements

2004 ◽  
Vol 33 (5) ◽  
pp. 412-417 ◽  
Author(s):  
C. H. Swartz ◽  
R. P. Tompkins ◽  
T. H. Myers ◽  
D. C. Look ◽  
J. R. Sizelove
Keyword(s):  
Magnetic Field ◽  
Variable Magnetic Field ◽  
Hall Measurements

Characterization of a new variable magnetic field linear plasma device

2021 ◽  
Vol 28 (12) ◽  
pp. 123514
Author(s):  
F. Filleul ◽  
A. Caldarelli ◽  
C. Charles ◽  
R. W. Boswell ◽  
N. Rattenbury ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Variable Magnetic Field ◽  
Plasma Device ◽  
Linear Plasma
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