Dielectric Spectroscopy Analyses of SrBi4Ti4O15 Films Obtained from Soft Chemical Solution

Simões, Alexandre Zirpoli; Riccardi, C. S.

doi:10.1155/2009/928545

Cited by 5 publications

(6 citation statements)

References 32 publications

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“…Fillers are added to polymeric materials in order to enhance physical and mechanical properties [4][5][6][7]. Over the past few years, there have been few numbers of researches on the effect of fillers on di-electric properties of polymers [8][9][10]. The shift from ceramic electrical insulating materials (e.g., porcelain and glass) and from oil-paper insulations to polymeric materials has been the major change in the field of high voltage insulation technology [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Materials Selection, Synthesis, and Dielectrical Properties of PVC Nanocomposites

Mobarak

Bassyouni

Almutawa

2013

Advances in Materials Science and Engineering

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Materials selection process for electrical insulation application was carried out using Cambridge Engineering Selector (CES) program. Melt mixing technique was applied to prepare polyvinyl-chloride- (PVC-) nanofumed silica and nanomontmorillonite clay composites. Surface analysis and particles dispersibility were examined using scanning electron microscope. Dielectrical properties were assessed using Hipot tester. An experimental work for dielectric loss of the nanocomposite materials has been investigated in a frequency range of 10 Hz–50 kHz. The initial results using CES program showed that microparticles of silica and clay can improve electrical insulation properties and modulus of elasticity of PVC. Nano-montmorillonite clay composites were synthesized and characterized. Experimental analyses displayed that trapping properties of matrix are highly modified by the presence of nanofillers. The nanofumed silica and nanoclay particles were dispersed homogenously in PVC up to 10% wt/wt. Dielectric loss tangent constant of PVC-nanoclay composites was decreased successfully from 0.57 to 0.5 at 100 Hz using fillers loading from 1% to 10% wt/wt, respectively. Nano-fumed silica showed a significant influence on the electrical resistivity of PVC by enhancing it up to 1 × 1011 Ohm·m.

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Section: Introductionmentioning

confidence: 99%

Materials Selection, Synthesis, and Dielectrical Properties of PVC Nanocomposites

Mobarak

Bassyouni

Almutawa

2013

Advances in Materials Science and Engineering

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“…Over the past few years, there have been few numbers of researches on the effect of fillers on dielectric properties of polymers [3][4][5].The nanotechnology applied to dielectric has certainly become an interesting topic, because the large advantage of this type of structures by the improvement in electrical characteristics were suggested [6].The addition of nanofillers into polymer matrix brings about not only the distribution of electrical field inside the materials, but also new structural behavior due to the interface interaction [7]. The nature of filler plays an important role in the polymer material stability for power cables, transformers, insulators because they are subjected to permanent multi stress action [8].…”

Section: Introductionmentioning

confidence: 99%

Some Studies on Poly (vinyl chloride)/Layered Silicate Nanocomposites: Electrical, Antibacterial and Oxygen Barrier Properties

Sadek¹,

Abd‐El‐Messieh²,

Khalil³

et al. 2014

IOSRJAC

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The influence of 1.31PS organoclay content relative to PGV grade on the properties of PVC compounds was analyzed. Dielectric properties (i.e. permittivity ' & dielectric loss ") of the PVC nanocomposites were investigated in the frequency range 10 2-10 5 Hz at room temperature  25 o C. In addition to the dielectric properties the experimental data of conductivity term  were also detected. The initial results show that nanoparticles of 1.31PS clay can improve electrical insulation properties of PVC by lowering "(at 2.5 phr) and  (at 4 phr). The nano 1.31PS shows a significant influence on the electrical resistivity of PVC by enhancing it up to 1.4 x 10-11 ohm.cm. Biodegradation percentage (BD%) and optical density (OD) of tested samples have been screened in testes against both Gram-positive bacteria such as Micrococcus luteus RM1 and Gram-negative bacteria such as Pseudomonas aeruginosa HR1.The particle size and morphology of PVC/1.31PS was found to play a significant role in indicating the antimicrobial efficiency. The results indicate a remarkable and significant resistance of PVC/1.31PS (2.5phr) to both kinds of microorganism, as compared with PVC containing 1.31PS (10phr). The oxygen permeability was measured at 23 o C and 50% relative humidity. With increasing 1.31PS content up to 6 phr the oxygen permeability of the PVC matrix is reduced based on the tortuous path formation.

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“…Various techniques have been used for the preparation of SBT. Some of the well-known methods are: pulsed laser deposition [3], polymeric precursor method [2], solid state reaction [4],ball milling [5], high-energy milling [6,7], soft chemical method [8] and sol-gel [9] synthesis. The major problems associated with these methods are either the process duration or the difficulties in achieving the desired product phase composition.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric Properties of Strontium Bismuth Titanate (SrBi4Ti4O15) Synthesized Using Solution Combustion Technique

Shrivastava

Subohi

Malik

2013

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The ferroelectric properties of layer-structured Strontium Bismuth Titanate (SBT) have been investigated in this study. SBT was prepared using solution combustion technique with glycine as a fuel. Single-phase formation of the layer-structured compound of SBT with orthorhombic structure was achieved after calcinations at 800 °C, and was confirmed by x-ray diffraction studies. Scanning electron micrograph shows that the grains exhibit a plate like morphology and possesses ne particle size. The as prepared sample exhibits ferroelectric properties with remnant polarization of 2Pr = 1.84 μC/cm2at coercive field 2Ec= 2.61 kV/cm and displays low dielectric loss. Its ferroelectric transition temperature (Tc) is found to be 450 °C.

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Dielectric Spectroscopy Analyses of SrBi₄Ti₄O₁₅ Films Obtained from Soft Chemical Solution

Cited by 5 publications

References 32 publications

Materials Selection, Synthesis, and Dielectrical Properties of PVC Nanocomposites

Materials Selection, Synthesis, and Dielectrical Properties of PVC Nanocomposites

Some Studies on Poly (vinyl chloride)/Layered Silicate Nanocomposites: Electrical, Antibacterial and Oxygen Barrier Properties

Ferroelectric Properties of Strontium Bismuth Titanate (SrBi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub>) Synthesized Using Solution Combustion Technique

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