Investigation and production of usability of nano PVDF matrix – piezo ceramic composites as acceleration – vibration sensors

The main objective is to explore how different ceramic additives, temperature, and concentration affect PVDF's piezoelectric properties and to produce piezo composites with high β-phase content. PVDF composites with strontium titanate (SrTiO₃) and nickel ferrite (NiFe₂O₄) additives were produced using various concentration and temperature parameters. During the experiments, PVDF-DMF concentrations were set at 1:10, 1:25, and 1:50 ratios, and temperatures of 0°C, 25°C, and 50°C were used while removing DMF with pure water. Additives were incorporated into each sample at 20%, 40%, and 60% by weight relative to PVDF. The samples were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Results indicated that low temperatures and high PVDF concentrations significantly enhanced β-phase content, with no α-phase peaks detected in samples produced at 0°C. A 20% nickel ferrite additive was found to promote β-phase formation and enhance piezoelectric properties, while no significant effect of strontium titanate on β-phase content was observed. The study concludes that PVDF composites with high β-phase content are a suitable foundation for sensor applications and provides insights for determining optimal parameters in producing PVDF-based piezoelectric materials.)