http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Magnetoresistor sensor with magnetorheological elastomers
Ioan Bica 한국공업화학회 2011 Journal of Industrial and Engineering Chemistry Vol.17 No.1
The paper presents the manner of achieving and testing a magnetoresistor sensor with magnetorheological elastomers. It is shown that the voltage at the output terminals of themagnetorheological sensor device is considerably influenced by the intensity of the transverse magnetic field, for control voltages kept constant. The experimental results obtained are presented and discussed.
Ioan Bica 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5
This paper deals with the process of achievement of anisotropic magnetorheological elastomers (MREs),based on silicone rubber and iron nanoparticles. Plane capacitors are manufactured with MREs. The capacity C of the plane capacitors is measured as function of the intensity H of the magnetic field. By using the approximation of the dipolar magnetic moment and the ideal elastic body model, respectively, the tensions and deformations field and respectively the elasticity module of MREs function of H have been determined, for magnetic field values of up to 1000 kA/m. The obtained results are presented and discussed.
Ioan Bica 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.1
Two sets, each of five samples, of magnetorheological elastomers (MREs) based on silicone rubber and carbonyl iron were prepared. One set of samples was obtained by polymerization of the silicone rubber with additives in the absence of the magnetic field, while the other by polymerization of the silicone rubber with additives in the presence of the magnetic field (840 kA/m). The samples from each set differ by volume concentration of the magnetic phase. By means of an experimental setup described in the paper, the electrical resistance R of the samples was measured as a function of the force F applied on the surface of the samples, for fixed values of the transverse magnetic field strength H. From the as-measured dependence R = R(F)H, the dependence s = s(p)H of the electric conductivity s on the applied pressure p was determined. The experimental results are discussed in view of possible applications like magnetomechanical sensors working in hostile media.
Magnetostrictive and viscoelastic characteristics of polyurethane-based magnetorheological elastomer
Ioan Bica,Eugen M. Anitas,Larisa Marina Elisabeth Averis,권승혁,최형진 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.73 No.-
We fabricated magnetorheological (MR) elastomers using polyurethane and carbonyl iron based MRsuspensions. Using dipolar approximation and linear elasticity theory for small deformations, wedetermined their components of deformations and tensions, showing that their elasticity state dependsnot only on magneticfield intensity but also on volume fraction. MR characteristics of elastomers’dynamic properties and creep-recovery values were also measured using a rotational rheometerequipped with a magneticfield supplier. Experimental results from both plane capacitors and viscoelastictests showed similarities between static and dynamic elasticity states regarding their dependence onmagneticfield intensity and volume fraction of magnetizable phase.
Electroconductive Magnetorheological Suspensions: Production and Physical Processes
Ioan Bica 한국공업화학회 2009 Journal of Industrial and Engineering Chemistry Vol.15 No.2
Production of magnetorheological suspensions based on silicon oil, stearic acid and iron nanocarbonil (CI) microparticles is achieved by the method of mechanical mixing. Magnetorheological suspensions with concentrations (in massic percentages) of 20%, 60% and 80% are produced, used in manufacturing magnetoresistors. It is shown in the paper that the magnetoresistors resistance is considerably influenced by the magnetic field intensity. By resistance measurements, characteristic magnitudes, which participate in the electric conductivity phenomenon in magnetorheological suspensions in magnetic field, are determined. 2009 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Influence of the magnetic field on the electric conductivity of magnetorheological elastomers
Ioan Bica 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.3
In this paper one shows that magnetoresistors can be manufactured by processing silicone rubber, iron microparticles and graphite powders. Themagnetic field dependence of the current flowing through the magnetoresistor, say I = I(H)U, is measured for constant voltages. Functions established in this manner have been discussed both during and after polymerization. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Production of iron nanotubes in plasma
Ioan Bica 한국공업화학회 2008 Journal of Industrial and Engineering Chemistry Vol.14 No.2
The paper presents the experimental installation, the procedure of obtainment and some mechanisms of iron nanotubes formation in plasma. The inner and outer diameters of nanotubes produced in this manner are located within regions like 0.1–0.45 nm and 2.2–14 nm, respectively. The length takes values between 5 and 12 nm.We emphasize that a quantized description of diameters formation is conceivable. To this aim a diameter quantum like diq~1.2 nm can be proposed. The experimental results obtained are discussed.
Ioan Bica,Eugen M. Anitas,Madalin Bunoiu,Boris Vatzulik,Iulius Juganaru 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Graphene nanoparticles are used to produce a hybrid electro-conductive magnetorheological elastomer(MRE-hybrid). We fabricate a magnetoresistive sensor based on the obtained MRE-hybrid. We measurethe electrical resistance of the MRE-hybrid in a transverse magnetic field of intensity 0 ≤ H (kA/m) ≤ 65,and separately, the electrical resistance under the influence of a compression pressure p ≤ 14.4 kPa. From the obtained results we determine the variation of electrical conductivity with H, and respectivelywith p.We develop a theoretical model which explains the effects of H and p on electrical conductivity ofMRE-hybrid. The obtained results are presented and discussed.