New nano-composite metal–polymer materials: dielectric behaviour

Effect of BaTiO3 size on dielectric property of BaTiO3/PVDF composites

“…Although the composites employing conductive fillers have made promising progress in the dielectric property [1][2][3][4][5], ceramic/polymer composites are still attractive to researchers because of simple and convenient process, cheap cost and excellent property, such as low dielectric loss, low conductivity and leakage current. In these studies [6][7][8][9][10][11], different systems have been demonstrated in order to obtain the desirable dielectric materials.…”

Metal‐Containing Polymers: Cryochemical Synthesis, Structure, and Physicochemical Properties

“…Films of pure PPX and of PPX composites resulting from cryochemical solidstate synthesis were studied by the dielectric spectroscopy method [70]. Dielectric spectroscopy has proven very useful for studying the structure and dynamics of polymer materials, as well as the transport mechanism of charge carriers.…”

“…% there is an essential probability for electron transfer from one particle to another and thus such particles become involved in the percolation process. Analysis of dielectric relaxation parameters of this process allowed us to determine the fractal properties of the percolation cluster [70]. The dielectric response for this process in the time domain can be described by the Kohlrausch-Williams-Watts (KWW) expression where Y is the dipole correlation function, t is the average relaxation time, and n is the stretched parameter, 0 < n £ 1.…”

“…The dielectric response for this process in the time domain can be described by the Kohlrausch-Williams-Watts (KWW) expression where Y is the dipole correlation function, t is the average relaxation time, and n is the stretched parameter, 0 < n £ 1. It was shown [73] that in complex fractal systems, for the relaxation caused by the charge transfer along the ramified path, the stretched parameter n could be related to the fractal dimension D f of the percolation cluster, For the sample PPX + Cu the calculated fractal dimension D f is equal to 2.609 [70]. It should be noted that the above-mentioned size distribution of metal nanoparticles leads to the mutual charging of such particles in the percolation cluster.…”

Novel Ag–BaTiO3/PVDF three-component nanocomposites with high energy density and the influence of nano-Ag on the dielectric properties

“…Among main types (0-3, 1-3, 2-2) of composites, the 0-3 type composites have been widely studied in recent years for their good dielectric, mechanic, and intelligent properties [6,7]. Such researches were mainly focused on two-component composites: polymers or copolymers such as PVDF, polyurethane, P(VDF-TrEF) were the matrixes [1,7]; inorganic particles such as metals or ceramics were the fillers [1,8]. But high energy density dielectrics reported before were mainly based on copolymers [9,10] which were highly cost; or filled with organic materials which contained lead (not environmental friendly) [10].…”