Beyond the traditional polarization response in electrets: Some amazing properties of the ferrorelaxor polymers

This study developed a high energy electron irradiation approach, creating random defects fields, interrupting long range polar-ordering, and converting the polymer into a ferrorelaxor which exhibits a slim polarization hysteresis loop at room temperature and relaxor dielectric responses. More interestingly, the ferrorelxor exhibits a very large room temperature electrostriction. Besides the high energy e-beam irradiation to convert the normal ferroelectric P(VDF-TrFE) into a ferrorelaxor, using the radical polymerization method to copolymerize VDF-TrFE with a third bulker monomer such as CFE or CTFE can also lead to the conversion to the relaxor.