Y.A.O. Assagra, Altafim, R.A.P., J. do Carmo, R.A.C. Altafim, Dmitry Rychkov, Wirges, W., Gerhard, R.
A new route to piezo-polymer transducers: 3D printing of polypropylene ferroelectrets
IEEE Transactions on Dielectrics and Electrical Insulation, vol. 27, no. 5, pp. 1668-1674
Here, a promising approach for producing piezo-polymer transducers in a one-step process is presented. Using 3D-printing technology and polypropylene (PP) filaments, we are able to print a two-layered film structure with regular cavities of precisely controlled size and shape. It is found that the 3D-printed samples exhibit piezoelectric coefficients up to 200 pC/N, similar to those of other PP ferroelectrets, and their temporal and thermal behavior is in good agreement with those known of PP ferroelectrets. The piezoelectric response strongly decreases for applied pressures above 20 kPa, as the pressure in the air-filled cavities strongly influences the overall elastic modulus of ferroelectrets.
NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTSZ Weißenburg
Altafim, R.A.P., Dmitry Rychkov, Wirges, W., Gerhard, R., Basso, H.C., R.A.C. Altafim, M. Melzer
Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene-propylene copolymer films-A comparison
IEEE Transactions on Dielectrics and Electrical Insulation, vol. 19, no. 4, pp. 1116-1123