Sulaiman Hajeesaeh and Supasarote Muensit

pp. 413 - 418

Abstract

This work extended the range of material properties by fabricating the BaTiO₃
 /PVDF composite. In order to obtain the 0-3 composite without the interconnectivity of the ceramic powders, a low volume fraction of 0.3 of barium titanate (BaTiO₃) was filled in a matrix of polyvinylidene fluoride (PVDF) and the mixture was homogeneously stirred. The composite was shaped into a sheet form by a tape casting method. The microstructure of the composite was observed using scanning electron microscopy (SEM) which revealed
that the connectivity of the composite was mainly 0-3. Subsequently, theoretical models and equations were applied to the composite for comparisons with measurements. The density and heat capacity of the composites were experimentally obtained to be 3.21103 kg/m³ and 3021.7 J/kg °C, respectively. The composite was corona poled before the test of dielectric response. Its 1 kHz-dielectric constant and dielectric loss at room temperature were 11.5 and 0.21, respectively. The good dielectric combined with the flexibility of the
material implies that the composite is attractive for electronic applications where a light, environmentally friendly, ease to fabricate and low-cost device is required.

Keywords

• BaTiO₃
• PVDF
• piezoelectric
• dielectric
• composite