Dielectric behaviour and functionality of polymer matrix - ceramic BaTiO3 composites

By A. Patsidis, Georgios Psarras. 2008

147 citations recorded by the source corpus.

Dielectric properties of polymer matrix - ceramic BaTiO3 composites were examined by means of Broadband Dielectric Spectroscopy (BDS) in the frequency range of 10 -1 -10 7 Hz and over the temperature range of 30-160°C, vary- ing the content of ferroelectric particles. Experimental results provide evidence that the recorded relaxation phenomena include contributions from both the polymeric matrix and the presence of the reinforcing phase. Obtained results are analysed via the electric modulus formalism. Polymer matrix exhibits two distinct relaxation processes attributed, with ascending relaxation rate, to glass/rubber transition, and local motions of polar side groups. Interfacial polarization or Maxwell-Wagner-Sillars process is present in the low frequency range and at high temperatures. Finally, in the vicinity of the characteristic Curie temperature (TC) an abrupt variation of the real part of dielectric permittivity with temperature is recorded. This peak is probably related to the ferroelectric to paraelectric phase transition of the employed ceramic inclu- sions.

Subfields: Biomedical Engineering, Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/0a149c5b937535eb7777d20ecf519883c121dfb9

Citations in the corpus

• Dielectric properties of Poly(vinylidene fluoride)/ CaCu3Ti4O12 nanocrystal composite thick films (2010, unknown): “7391 nm, and Z = 2), has been used as a filler and studied to explore the possibility of obtaining high dielectric permittivity composites for potential capacitor applications [14–21].”