Poly(vinylidene fluoride)/ CaCu3Ti4O12 and La doped CaCu3Ti4O12 composites with improved dielectric and mechanical properties

La doped barium titanate/polyimide nanocomposites: A study of the effect of La doping and investigation on thermal, mechanical and high dielectric properties

“…The difference in the conductivity of PI matrix and BTL ceramic filler was responsible for the interfacial polarization. It can be increased by rising the interfacial area in the nanocomposite film, which in turn increases the dielectric constant value . The variation of dielectric constant can also be explained by the formation of ceramic (BTL) network in the polyimide matrix.…”

A novel method to synthesize CaCu3Ti4O12 with acetylacetonate precursor

“…However, investigating the origin of the giant dielectric constant and decreasing the dielectric loss effectively still require great efforts. At present, many works have been done to reveal the relationship between CCTO ceramic and dielectric properties [5][6][7][8]. It is also very important to study the relationship between dielectric properties and CCTO crystal structure.…”

Composite Ferroelectric Coatings Based on a Heat-Resistant Polybenzoxazole Polymer Matrix

“…The shift of the phase transition region toward higher temperatures in the composite structure, as well as the sufficient rigidity of the poly(benzoxazole) matrix, provide high temperature and frequency stability of the dielectric constant of the studied composites.Coatings 2020, 10, 286 2 of 15 not a simple combination of those of the initial components; the composites may also acquire some additional functionalities that are provided by the processes occurring at the polymer/filler interface or at the interface between film coating and a substrate.The most promising directions include preparation of composites with enhanced dielectric permittivity, relatively low dielectric losses, and high thermal stability of dielectric parameters.The search for new polymer-based film composites with ferroelectric fillers and study of their properties remains an actual trend due to widening range of practical applications of these materials in various engineering areas (radioelectronics, optoelectronics, acoustic electronics, non-linear optics [1][2][3][4]). The mainly used ferroelectric fillers are nanodispersed BaTiO 3 [5][6][7][8][9][10][11][12][13][14] and nanodispersed powders of solid solutions of lead titanate zirconate (PZT) ferroelectric ceramics [13,[15][16][17].Properties of a polymer-based nanocomposite strongly depend not only on compositions of a filler and a matrix material, but also on the concentration of introduced filler, size of nanodispersed filler grains [12,18], degree of possible aggregation of nanodispersed filler, the nature of interactions occurring at the polymer matrix/filler interface [8,[19][20][21][22][23], and degree of homogeneous distribution of a filler inside a matrix. Due to all these factors, it is possible to control properties of the prepared composites by varying some above-mentioned parameters.In the development of film capacitors, including built-in capacitors for integrated circuits [16,[24][25]…”

“…However, there is a contradiction between striving for increase in ε (due to rise in filler amount) and the corresponding increase in losses in a dielectric composite. For instance, a number of studies of ferroelectric/polymer composites containing BaTiO 3 as a ferroelectric component [5,18,[27][28][29][30][31] demonstrated that the achieved values of dielectric permittivity ε in these composites range from 40 to 200 (depending on preparation technique and ferroelectric filler concentration). The values of filler load did not exceed 30 vol.%.…”

“…The mainly used ferroelectric fillers are nanodispersed BaTiO 3 [5][6][7][8][9][10][11][12][13][14] and nanodispersed powders of solid solutions of lead titanate zirconate (PZT) ferroelectric ceramics [13,[15][16][17].…”