Barium Titanate Elastomer composite based capacitive stretch sensor

This work investigates the performance of a Barium-Titanate (BTO) elastomer composite interdigital capacitive based large strain sensor. The high strain interdigital capacitive sensor examined here is fabricated using a ceramic polymer composite substrate with different sizes of BTO's nanoparticles based on 100 nm or 200 nm BTO ceramic particles dispersed uniformly in an Ecoflex™ 00-30 silicone based elastomer. While BTO particles with a 100 nm particle size offers a higher relative permittivity and slightly higher change in capacitance with strain, it is demonstrated to be less reliable than those formed with 200 nm BTO nanoparticles.