Synthesis and characterization of PVDF/KNN composites

Reference Presenter Authors
08-116 Rodrigo Felipe Carneiro Capetta Falcao, E.A.(Universidade Federal de Grande Dourados); Botero, E.R.(Universidade Federal de Grande Dourados); Borges, J.V.(Universidade Federal da Grande Dourados); Capetta, R.F.(Universidade Federal da Grande Dourados); Ferroelectric polymers have received great attention of researchers because their use in optical and electronic devices. Among these polymers it can be cited the polyvinylidene fluoride (PVDF) because their excellent electric properties in comparison with another ferroelectric polymer. However, these properties are lower them other ferroelectric materials, such PZT ceramics, for example. In this sense, the hybrid materials as polymers/ceramic bring a new trend of materials. From literature, it can be find a great number of papers that reports the lead-based ceramic insertion into PVDF matrix improves their properties. Although, the lead oxide evaporation of those piezoelectric ceramics during the sintering process harms the environment, leading to antilead legislation in many countries. In this way, the sodium potassium niobate (KNN) solid solution, that is a lead free ferroelectric ceramic, might be a new candidate to be used to improve the ferroelectric properties of PVDF samples. Therefore, in this work the PVDF were doped with KNN ceramic in different concentrations were synthesized and characterized. The experimental measurements revealed that PVDF/KNN composites have similar properties than other lead based composites, being a potential candidate to be used in electronic devices.
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