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RISS 인기검색어
- 검색키워드
- 저자 : Satyanarayan Bhuyan (검색결과 3 건)
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Tripathy A.,Bhuyan Satyanarayan,Das S. N.,Choudhary R. N. P. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.2
A double perovskite ceramic electronic sample of Bi2MnFeO6 has been formulated and synthesized using an ordinary solid-state sintering route from the metal oxides of bismuth, manganese, and iron. The crystallographic structure, morphological, dielectric, electrical, and current–voltage parameters have been analyzed for the fabricated sample. Room temperature XRD (X-ray diffraction) investigation confirms the monoclinic phase. The microstructure obtained from scanning electron microscope reveals compact grain structures with little or no voids. The impedance as well as its electrical properties have been appraised through the impedance analyzer (LCR meter) for a wide range of temperatures and frequencies (30–230 °C and 1 kHz–1 MHz). The negative temperature coefficient of the material is derived from the impedance analysis. The non-ohmic behavior of the sample was confirmed by the current versus voltage (V–I) characteristic of the sample. Most of the significant physical and chemical properties linked with this compound may be critical in the development of future peer group electrical and electronic devices.
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Biswal Bijaylaxmi,Mishra Dilip Kumar,Mohapatra Jyoshnarani,Bhuyan Satyanarayan 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.5
The conventional high-temperature solid-state reaction technique is used to synthesize aluminosilicate ceramics of three different compositions (Al 0.70 Si 0.30 O, Al 0.73 Si 0.27 O, Al 0.75 Si 0.25 O). These aluminosilicate ceramics are systematically investigated by XRD, FTIR, SEM, dielectric, electrical, and UV–visible analysis. The polycrystalline ceramics are well synthesized at a sintering temperature of 1450 °C, confirmed from XRD studies. The IR interferogram reveals the presence of mullite (3Al 2 O 3 2SiO 2 )-type molecules in these aluminosilicate ceramics. The SEM images show the formation of homogeneous microstructures with appreciable density. The room temperature dielectric constant values for Al 0.70 Si 0.30 O, Al 0.73 Si 0.27 O, Al 0.75 Si 0.25 O ceramics are 1.5, 1.8, and 1.7 at 1 MHz frequency with dielectric loss values of 0.02, 0.04, and 0.06 respectively. The ac conductivity spectrum of these samples obeys the Arrhenius equation and the classical correlated barrier hopping model governs the conduction mechanism in these ceramics. Complex impedance analysis confirms the contribution of both grain and grain boundary towards transport processes in these ceramics. The UV–visible spectrum reveals that the synthesized ceramics, Al 0.70 Si 0.30 O, Al 0.73 Si 0.27 O, and Al 0.75 Si 0.25 O have a wide-band-gap of the order of 3.45 eV, 3.42 eV, and 3.39 eV respectively. These ceramics can be preferably used as electronic substrates, packaging material for high-frequency circuits, and infrared transmitting window materials.
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Contactless Stimulation of Multiple Piezoelectric Devices Using Electric Field
Tanaya Nayak,Biswaranjan Swain,Praveen P. Nayak,Satyanarayan Bhuyan 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.3
The contactless energy transmission scheme using parallel-plate capacitor like structure has been explored which provides a platform for energization of multiple piezoelectric (piezo) components. In the proposed method, ac electric fi eld lines produced by copper electrodes penetrate to the piezo components that are coaxially aligned and positioned in-between at certain distance away from each electrode. Consequently, the components are strongly excited at a point where the functioning electric field source frequency alike with the mechanical resonant frequency of the piezo components. The maximum output power corresponding to optimum load and resonant frequency acquired from the contactless energized multi piezo devices is better than that of power obtained from contactless energized single piezo component by this parallel-plate capacitor electric field generator. The testing results reveal the practicability of non contact stimulation/excitation of multi piezo components simultaneously through electric fi eld.
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