Search results for: R.N.P. Choudhary

Items from 1 to 20 out of 189 results

article

Resistive, capacitive and conducting properties of Bi0.5Na0.5TiO3-BaTiO3 solid solution

Sushrisangita Sahoo, Sugato Hajra, Manojit De, R.N.P. Choudhary

Ceramics International > 2018 > 44 > 5 > 4719-4726

In the present paper, the effect of addition of a small amount (8wt%) of barium titanate (BT) on electrical properties of bismuth sodium titanate (BNT) forming a solid solution of a composition (0.92)(Bi_0.5Na_0.5TiO₃)+(0.08)(BaTiO₃) (BNT-BT-8) has mainly been reported. The solid solution of BNT-BT-8 was prepared by a cost effective and standard mixed-oxide method. Preliminary structural analysis using...

article

Dielectric and impedance properties of Bi(Zn2/3V1/3)O3 electronic material

S. Halder, K. Parida, S.N. Das, S.K. Pradhan, more

Physics Letters A > 2018 > 382 > 10 > 716-722

A polycrystalline vanadium doped lead free dielectric material of Bi(Zn_2/3V_1/3)O₃ (BZV) has been prepared using a standard high-temperature solid state reaction technique. Its temperature and frequency dependent capacitive, conductive and resistive characteristics are outlined though experimental investigation. The formation of single phase compound of BZV material with orthorhombic crystal symmetry...

article

Dielectric and impedance spectroscopy of Bi(Ca0.5Ti0.5)O3 ceramic

Varsa Purohit, Rajib Padhee, R.N.P. Choudhary

Ceramics International > 2018 > 44 > 4 > 3993-3999

Bismuth calcium titanate (BiCa_0.5Ti_0.5O₃) ceramic, fabricated by a ceramic processing technique, has been characterized using a variety of experimental techniques. Analysis of basic crystal structure using X-ray diffraction data exhibits the orthorhombic system. Measurements and detailed analysis of some electrical parameters (i.e.,dielectric constant, loss tangent (energy loss), electrical impedance...

article

Structural and electrical properties of Bi3TiVO9 ferroelectric ceramics

Prabhasini Gupta, Rajib Padhee, P.K. Mahapatra, R.N.P. Choudhary, more

Journal of Alloys and Compounds > 2018 > 731 > C > 1171-1180

Bi₃TiVO₉ (BTV), a member of Aurivillius family, has been fabricated by a mixed-oxide route at high temperature. Room temperature structural analysis using X-ray diffraction data confirms the crystallization of ceramic in the orthorhombic crystal structure. Surface morphological analysis using field-emission scanning electron microscopic (FESEM) images and elemental study with energy dispersive X-ray...

article

Electrical and mechanical behavior of PMN-PT/CNT based polymer composite film for energy harvesting

Satyabati Das, Asutya Kumar Biswal, Kalpana Parida, R.N.P. Choudhary, more

Applied Surface Science > 2018 > 428 > C > 356-363

The pyrochlore-free 30-PMN-PT/CNT/PVDF based piezoelectric flexible composite film has been synthesized for potential application in piezoelectric energy harvesting. Electrical characterization reveals that the maximum output voltage and current generated by the 30vol.% PMN-PT/CNT/PVDF composite is ∼4V and 30nA respectively, comparable with the available literature. Further, impedance analysis has...

article

Electrical and multiferroic characteristics of PVDF-MnFe2O4 nanocomposites

C. Behera, R.N.P. Choudhary

Journal of Alloys and Compounds > 2017 > 727 > C > 851-862

Thin films of PVDF-MnFe₂O₄ nano-multiferroic composites (in 0–3 connectivity) of varying compositions have been prepared through a solution-casting route. X-ray diffraction and scanning electron microscopy techniques have been used to study basic crystal structure and micrograph respectively of the composites. Structural investigation confirms the presence of polymeric electro-active β-phase in PVDF...

article

Electrical, optical and magneto-electric characteristics of BiBaFeCeO6 electronic system

Kalpana Parida, Sujit Kumar Dehury, R.N.P. Choudhary

Materials Science and Engineering: B > 2017 > 225 > C > 173-181

Double perovskite multiferroic compound BiBaFeCO₆ was synthesized by a high-temperature solid-state reaction method. We mainly report X-rays structural and dielectric properties of polycrystalline BiBaFeCO₆. The micrograph of the sample, recorded at room temperature, exhibits the homogeneous distribution of grains on the surface of the sample. Analysis of optical spectrum obtained using UV spectroscopy...

article

Structural, electrical and magnetic properties of (Cd, Ti) modified BiFeO3

Nitin Kumar, Alok Shukla, R.N.P. Choudhary

Physics Letters A > 2017 > 381 > 33 > 2721-2730

Bismuth ferrite (BiFeO₃), one of the most prominent members of multiferroics, has multiple promising characteristics useful for multifunctional applications. Multi-doped (Cd, Ti) complex bismuth ferrite [i.e., Bi(Cd_1/4Ti_1/4Fe_1/2)O₃] ceramic was synthesized through a mixed-oxide route. X-ray structural analysis of the prepared material provides its basic crystal data of a single-phase orthorhombic...

article

Enhanced dielectric and ferroelectric properties of PVDF-BiFeO3 composites in 0–3 connectivity

Swagatika Dash, R.N.P. Choudhary, M.N. Goswami

Journal of Alloys and Compounds > 2017 > 715 > C > 29-36

Some composites fabricated with PVDF (Poly-Vinyl-difluoride) and BFO (BiFeO₃) in 0–3 connectivity have been fabricated by a solution-casting method. The existence of all three polymorphic phases (α-, β- and γ-) of PVDF in the composites is confirmed by analysing x-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectra. The intensity of the XRD peaks of the crystalline phase of the BFO...

article

Structural, dielectric and impedance characteristics of (Sm0.5Li0.5)(Fe0.5V0.5)O3 multiferroics

Susmita Nath, Subrat Kumar Barik, R.N.P. Choudhary, Sujit Kumar Barik

Physics Letters A > 2017 > 381 > 27 > 2174-2180

A single phase multiferroic magnetoelectric compound, (Sm_0.5Li_0.5)(Fe_0.5V_0.5)O₃, is found at room temperature. This sample is fabricated using solid state reaction route. Analysis of the structural properties of the sample by X-ray diffraction method confirmed the fabrication of the desired compound with orthorhombic unit cell structure. Morphological property of the sample is recorded by field emission...

article

Multiferroic properties of Indian natural ilmenite

Truptimayee Acharya, R.N.P. Choudhary

Physics Letters A > 2017 > 381 > 11 > 1047-1053

In this communication, the main results and analysis of extensive studies of electric and magnetic characteristics (relative dielectric constant, tangent loss, electric polarization, electric transport, impedance, magnetic polarization and magneto-electric coupling coefficient) of Indian natural ilmenite (NI) have been presented. Preliminary structural analysis was studied by Rietveld refinement of...

article

Structural, electrical and magneto-electric characteristics of BiMgFeCeO6 ceramics

Kalpana Parida, Sujit Kumar Dehury, R.N.P. Choudhary

Physics Letters A > 2016 > 380 > 48 > 4083-4091

The polycrystalline sample of double perovskite BiMgFeCeO₆ was prepared by a standard ceramics processing technique (high-temperature solid-state reaction). Preliminary structural analysis using X-ray diffraction data has exhibited the formation of the material in orthorhombic system. Detailed studies of electrical properties (permittivity (dielectric constant), tangent loss, electrical modulus, conductivity...

article

Structural, electrical and magnetic properties of Bi(Ni0.45Ti0.45Fe0.10)O3

Nitin Kumar, Alok Shukla, C. Behera, R.N.P. Choudhary

Journal of Alloys and Compounds > 2016 > 688 > PA > 858-869

Nowadays, much attention is paid on the development of pure as well as mixed metal oxides to be used for multifunctional devices. In this paper, synthesis and extensive studies of electric and magnetic characteristics of bismuth ferrite (BiFeO₃ (BFO) modified bismuth nickel titanate Bi(Ni_0.5Ti_0.5)O₃ (BNT) have been reported. A complex polycrystalline multiferroic of these lead-free compounds (BNT...

article

Effect of sintering temperature on dielectric, electrical and magneto-electric characteristics of chemico-thermally synthesized (Ba0.9Gd0.1)(Ti0.9Fe0.1)O3

Sushrisangita Sahoo, P.K. Mahapatra, R.N.P. Choudhary

Ceramics International > 2016 > 42 > 14 > 15955- 15967

The polycrystalline samples of gadolinium ortho-ferrite (GdFeO₃) modified barium titanate (BaTiO₃) ceramics have been prepared by a chemico-thermal route. The effect of sintering temperature on electrical (dielectric, impedance and conductivity) and magnetic characteristics of the material has been observed. The sintering temperature does not affect the crystal structure. With the increase in sintering...

article

Dielectric and electrical characteristics of La0.5Na0.5Ga0.5V0.5O3

Truptimayee Acharya, R.N.P. Choudhary

Physics Letters A > 2016 > 380 > 31-32 > 2437-2444

La_0.5Na_0.5Ga_0.5V_0.5O₃ (LNGVO) ceramic was prepared using a high-temperature solid-state reaction method. The structural phase, microstructure, dielectric, ferroelectric and optical properties of the material were systematically investigated. The preliminary structural analysis using x-ray diffraction (XRD) data shows the formation of the material in an orthorhombic crystal structure at room temperature...

article

Structural, dielectric and impedance characteristics of CoTiO3

Truptimayee Acharya, R.N.P. Choudhary

Materials Chemistry and Physics > 2016 > 177 > C > 131-139

The present work reports the synthesis and characterization of the ilmenite-type rhombohedral structured CoTiO₃ ceramic. The polycrystalline powder of CoTiO₃ was prepared by the mixed-oxide technique. X-ray structural analysis of the compound confirmed the formation of a single-phase compound. The study of microstructure by scanning electron microscopy shows that the compound has well defined grains...

article

Composition control of magnetoelectric relaxor behavior in multiferroic BaZr0.4Ti0.6O3/CoFe2O4 composites

M.P.K. Sahoo, Zhang Yajun, Jie Wang, R.N.P. Choudhary

Journal of Alloys and Compounds > 2016 > 657 > C > 12-20

The (BaZr_0.4Ti_0.6O₃)_1 − x/(CoFe₂O₄)_x (abbreviated as BZT_1 − x/CFO_x; x = 0.10, 0.15, 0.20 and 0.25) polycrystalline composites are synthesized by a high-temperature solid state reaction technique. The effect of CFO composition on magnetoelectric-relaxor characteristics of the composites is thoroughly investigated. Detailed structural analysis of the composites by Rietveld refinement technique and first...

article

Dielectric relaxation of conductive carbon black reinforced ethylene‐octene copolymer vulcanizates

Suchilipsa Das, P. Ganga Raju Achary, Nimai C. Nayak, R.N.P. Choudhary

Polymer Composites > 37 > 2 > 342 - 352

The dielectric relaxation behavior of different conducting carbon black‐filled ethylene‐octene copolymer (EOC) vulcanizates prepared by melt‐mixing method has been studied as a function of frequency (100 Hz–5 MHz) over a wide range of temperatures (25–100°C). The effect of filler loading and frequency on AC conductivity, dielectric permittivity, impedance, and dielectric loss tangent (tanδ) has been...

article

Structural transformation and multiferroic properties of Ba–Mn co-doped BiFeO3

Jyoshna Rout, R.N.P. Choudhary

Physics Letters A > 2016 > 380 > 1-2 > 288-292

Pure BiFeO₃ and Bi1−xBaxFe1−xMnxO3 (x=0.10,0.20) fine ceramics were synthesized using mechano-synthesis route. The influence of co-doping (Ba–Mn) on structural and multiferroic properties of BiFeO₃ has been studied in different experimental conditions. X-ray diffraction patterns, Rietveld structural refinement of XRD patterns and Fourier transform infrared (FTIR) spectra reveal the structural transition...

article

Size dependent electrical and magnetic properties of mechanically-activated MnFe2O4 nanoferrite

C. Behera, R.N.P. Choudhary, Piyush R. Das

Ceramics International > 2015 > 41 > 10 Part A > 13042- 13054

The manganese nanoferrite (MnFe₂O₄) with an average particle diameter of 15nm was synthesized by mechanical activation followed by low-temperature thermal treatment. The milling energy induced during activation of precursors for the synthesis of MnFe₂O₄ nano-powders has been calculated using the basic principles of the collision model. X-ray structural analysis using Rietveld refinement confirmed...

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Search results for: R.N.P. Choudhary

Resistive, capacitive and conducting properties of Bi0.5Na0.5TiO3-BaTiO3 solid solution

Dielectric and impedance properties of Bi(Zn2/3V1/3)O3 electronic material

Dielectric and impedance spectroscopy of Bi(Ca0.5Ti0.5)O3 ceramic

Structural and electrical properties of Bi3TiVO9 ferroelectric ceramics

Electrical and mechanical behavior of PMN-PT/CNT based polymer composite film for energy harvesting

Electrical and multiferroic characteristics of PVDF-MnFe2O4 nanocomposites

Electrical, optical and magneto-electric characteristics of BiBaFeCeO6 electronic system

Structural, electrical and magnetic properties of (Cd, Ti) modified BiFeO3

Enhanced dielectric and ferroelectric properties of PVDF-BiFeO3 composites in 0–3 connectivity

Structural, dielectric and impedance characteristics of (Sm0.5Li0.5)(Fe0.5V0.5)O3 multiferroics

Multiferroic properties of Indian natural ilmenite

Structural, electrical and magneto-electric characteristics of BiMgFeCeO6 ceramics

Structural, electrical and magnetic properties of Bi(Ni0.45Ti0.45Fe0.10)O3

Effect of sintering temperature on dielectric, electrical and magneto-electric characteristics of chemico-thermally synthesized (Ba0.9Gd0.1)(Ti0.9Fe0.1)O3

Dielectric and electrical characteristics of La0.5Na0.5Ga0.5V0.5O3

Structural, dielectric and impedance characteristics of CoTiO3

Composition control of magnetoelectric relaxor behavior in multiferroic BaZr0.4Ti0.6O3/CoFe2O4 composites

Dielectric relaxation of conductive carbon black reinforced ethylene‐octene copolymer vulcanizates

Structural transformation and multiferroic properties of Ba–Mn co-doped BiFeO3

Size dependent electrical and magnetic properties of mechanically-activated MnFe2O4 nanoferrite

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