Preparation, composition, phase transition and electrical conductivity of two novel ferroelectric composites from Rochelle salt filled with pristine and oxidized MWCNT

Abstract

A comparative study on dielectric properties was conducted for two series of ferroelectric composites prepared from Rochelle salt (RS) filled with a conductive filler of multiwalled carbon nanotubes in pristine (MWCNT) or oxidized (OMWCNT) forms. FTIR technique was utilized to evaluate characterization of functional groups in the composites. The obtained results indicated that the oxidization of MWCNT resulted in the significant increase in phase transition temperature of RS, while reduced dielectric loss and conductivity of composite samples in comparison with the use of pristine MWCNT. Besides, the influence of OMWCNT and MWCNT content on properties of RS was also considered.

Keywords:

• Multiwalled carbon nanotubes; oxidization
• Rochelle salt; phase transition
• ferroelectrics