Abstract
PVDF has been reinforced with different amount of CaCu3Ti4-5x/4NbxO12 with x=0.05 powder prepared by solid state ceramic method. Composites were prepared by melt extrusion method. Phase composition was studied using powder X-ray diffraction (XRD). Microstructural, dielectric, and mechanical properties have also been studied. These composites have Young’s modulus more than that of pure PVDF. Two dielectric relaxations, one at low frequency and the other at high frequency, have been observed in these composites. Dielectric relaxation at low frequencies is of Maxwell-Wagner type while the one observed at high frequency is due to hopping of electrons among different valent states of transition metal ions. Nature of dielectric relaxation has been analysed using H-N function.
Highlights
Nowadays, polymer-ceramic composites have gained a lot of interest as potential candidates for many applications such as embedded capacitors, microelectronic packaging, and charge storage devices
Pure polyvinylidene fluoride (PVDF) crystallizes in α phase with characteristic 2θ peaks at 17.7∘, 18.7∘, and 19.9∘, corresponding to (110), (020), and (111) crystal planes, respectively [22]
Average crystallite size determined for P-50NbC composite from broadening of X-ray diffraction peak corresponding to 2θ value of (220) plane using Scherrer’s formula has been found to decrease to 47 nm from 59 nm for pure Nb doped CaCu3Ti4O12 (NbCCTO)
Summary
Polymer-ceramic composites have gained a lot of interest as potential candidates for many applications such as embedded capacitors, microelectronic packaging, and charge storage devices. A dielectric constant of value 150–260 was obtained for the composite layers based on the thickness ratio of copolymer layers to composite layers and dielectric constant of Journal of Composites copolymer [17] Since many such composite systems containing different polymers and CCTO have been studied using different particles size of ceramic phase. Many such composite systems containing different polymers and CCTO have been studied using different particles size of ceramic phase Among these polymers, ferroelectric PVDF has been widely used as a matrix material due to its pyroelectric, piezoelectric properties and thermoplastic behaviour. CCTO and CaCu3Ti4−5x/4NbxO12 with x = 0.05 have been synthesised by solid state technique This ceramic was dispersed in the PVDF matrix to develop high ε composites. Earlier studies on these high ε polymer-ceramic composites lacked study of their mechanical properties
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
