Metal-polymer PVDF/nickel composites and evaluation of their dielectric and thermal properties

Lebedev, S.M.; Gefle, O.S.; Tkachenko, S.N.

doi:10.1016/j.elstat.2009.11.007

Cited by 41 publications

(22 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous investigations have been conducted on different polymer-metal composites in order to understand their physical properties. 8,9 The addition of fillers into a polymer matrix may modify its properties by causing interphase interactions or the formation of an interface at the boundary between the polymer matrix and filler particles. 10,11 Therefore, stabilization or improvement of the mechanical, electrical, and thermal properties of dielectrics can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of PVDF thin films doped with 3 wt.% of RCl3 (R = Gd or Er)

2014

View full text Add to dashboard Cite

The dielectric permittivity (ɛ′), electric modulus (M″), and ac conductivity (σac) of pure polyvinylidene fluoride (PVDF) and PVDF containing 3 wt.% RCl3 (R = Er or Gd) were measured. The incorporation of 3 wt.% of ErCl3 or GdCl3 within the PVDF matrix is found significantly to increase its ɛ′ and σac. All investigated samples show different relaxation processes within the studied temperature and frequency ranges. The first process is αa-relaxation, which occurs around the glass transition temperature, Tg. The second process is αc-relaxation, which is associated with the molecular motions in the crystalline region of the main polymer chain. Third is the ρ-relaxation which observed for pure PVDF at low temperatures and high frequencies. The frequency dependence of σac shows that the conduction mechanism for pure PVDF and PVDF containing 3 wt.% of RCl3 is correlated barrier hopping (CBH). The binding energy of the carriers was calculated based on the CBH model. Finally, the results obtained in this work are discussed and compared with those for 3 wt.% LaCl3-doped PVDF and similar materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric properties of PVDF thin films doped with 3 wt.% of RCl3 (R = Gd or Er)

2014

View full text Add to dashboard Cite

show abstract

“…Therefore a small rate of material destruction at the tree growth stage can be observed for materials with high specific heat capacity and low heat conductivity. It can be achieved due to modification of the main properties of base polymers by micro-or nano-sized fillers changing thermal, mechanical and electrical properties of polymeric materials [17][18][19].…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

Treeing resistance parameters of polymeric dielectrics

Gefle

Lebedev

2012

2012 7th International Forum on Strategic Technology (IFOST)

View full text Add to dashboard Cite

Treeing resistance parameters for polystyrene, polymethyl methacrylate, and polycarbonate are presented in this paper. It has been shown that for polymers with residual mechanical strain the greatest treeing resistance is observed for samples with higher tensile yield strength. To decrease the treeing growth rate or increase the breakdown time of polymeric dielectrics, the thermal diffusivity of base polymers should be reduced.

show abstract

“…The originality of this work is to investigate the spin-coated layer composed of the PVDF matrix surrounding the 10 wt % Ni particles. Such dispersion was heavily loaded beyond the maximum 2 wt % investigated by Lebedev et al [6] . An interspatial reduction between the two phases by the spin coating of composites can then be investigated whether it affects destructively or constructively on the measured dielectric and magnetic properties.…”

Section: Introductionmentioning

confidence: 98%

“…Xu et al compared the effect of Ni, zinc, tungsten and carbon black fi llers in PVDF and found that Ni gave rise to the highest dielectric constant [5] . To tailor PVDF/Ni composites for applications, infl uences of temperature [6,12] and Ni loading around the percolation threshold [5, 10 -12] on their properties have been investigated. The percolation threshold is normally used in defi ning the regions where the material properties are considerably different.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and magnetic properties of polyvinylidene fluoride polymer composites highly loaded with nickel

Sirisathitkul

Jantaratana

Muensit³

2012

Science and Engineering of Composite Materials

View full text Add to dashboard Cite

In this work, electroactive polyvinylidene fl uoride (PVDF) was a matrix for dispersing 10 wt % ferromagnetic nickel (Ni) particles. The composites were formed into its shape by using a spin coater with varying spinning speeds from 750 to 3750 rpm to obtain the thicknesses between 68 μ m and 40 μ m on printed circuit board substrates. Magnetic hysteresis loops of the composites were dependent on the spinning speed because the spin regulated the dispersion and size distribution of Ni particles in the PVDF matrix. Owing to the Ni agglomeration, the composites prepared by 750, 1500 and 2250 rpm spinning clearly displayed soft ferromagnetic properties but the capacitance was decreased with the decrease in spinning speed. In every sample, the capacitance was reduced with the increase in frequency from 1 kHz to 100 kHz and remained minimal up to 1 MHz. These changes in capacitance can be explained by the polarization of surface charges of Ni clusters of varying sizes from different spinning speeds. The dissipation factor was, by contrast, sensitive to the frequency and the dispersion of Ni only at frequencies higher than 60 kHz.

show abstract

Metal-polymer PVDF/nickel composites and evaluation of their dielectric and thermal properties

Cited by 41 publications

References 9 publications

Dielectric properties of PVDF thin films doped with 3 wt.% of RCl3 (R = Gd or Er)

Dielectric properties of PVDF thin films doped with 3 wt.% of RCl3 (R = Gd or Er)

Treeing resistance parameters of polymeric dielectrics

Dielectric and magnetic properties of polyvinylidene fluoride polymer composites highly loaded with nickel

Contact Info

Product

Resources

About