2019 Volume 60 Issue 10 Pages 2132-2136
A novel composite consisting of silica nanoparticles (SiO2) and a typical organic ferroelectric of diisopropylammonium bromide (C6H16NBr, DIPAB) was prepared at different composition mass ratios. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques were utilized for characterization of the composite. Experiments for testing ferroelectricity was conducted from room temperature to 165°C under a weak electric field (5 V·cm−1) at a low frequency of 1 kHz. The results revealed a reduction of phase transition temperature with increasing SiO2 content. The Landau theories developed for bonded and isolated ferroelectric particles were used to explain the obtained anomalies.