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.