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Title: Poly(vinylidene fluoride)/ CaCu{sub 3}Ti{sub 4}O{sub 12} and La doped CaCu{sub 3}Ti{sub 4}O{sub 12} composites with improved dielectric and mechanical properties

Highlights: • High ϵ′ PVDF/CCTO and La doped CCTO composites prepared by Extrusion. • With addition of ceramic, there is substantial increase in the ϵ′ of matrix PVDF. • Composites exhibit double relaxation behavior. - Abstract: Melt extrusion process has been used to prepare high relative permittivity, ϵ' PVDF–CCTO and PVDF–LaCCTO composites. Phase composition has been studied using powder X-ray diffraction (XRD). Microstructural, dielectric and mechanical properties have also been studied. Young's modulus of PVDF increases with the ceramic reinforcement. Dielectric measurements are made in the frequency range 10{sup −2}–10{sup 6} Hz using two probe Novocontrol impedance analyser (ZG4) from room temp to 120 °C to study the dielectric relaxation. There is a substantial increase in ϵ' of the matrix PVDF on addition of LaCCTO.
Authors:
 [1] ; ;  [2] ;  [1] ;  [1]
  1. Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221 005 (India)
  2. School of Material Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221 005 (India)
Publication Date:
OSTI Identifier:
22475959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM COMPOUNDS; CERAMICS; COMPOSITE MATERIALS; COPPER COMPOUNDS; DIELECTRIC MATERIALS; DOPED MATERIALS; FLUORINATED ALIPHATIC HYDROCARBONS; LANTHANUM ADDITIONS; MICROSTRUCTURE; PERMITTIVITY; POLYVINYLS; RELAXATION; THIN FILMS; TITANATES; X-RAY DIFFRACTION