Dielectric and structural characterization and effective piezoelectric coefficient of KDP/p-Benzoquinone ceramic composites

Abstract A study of the interaction between an inorganic phase, KH 2 PO 4 (KDP) and an organic phase C 6 H 4 O 2 (BZQ) in composites KDP/BZQ is presented here. Studies by X-ray powder diffraction and Raman spectroscopy confirm the interaction by a variation in the volume of the unit cell and new bands identified corresponding to the formation of new hydrogen bonds between KDP and BZQ in the Raman spectra. Relaxation process and conductivity were studied using an impedance analyzer in a wide frequency range (10 2 –10 6  Hz) between room temperature and 90 °C allowing seeing the dielectric character of the composites and the proton conductivity behavior. Also the effective piezoelectric coefficient was determined by piezo response microscopy; it was observed a decrement of the KDP coefficient on increasing the concentration of BZQ, probably due to the interaction between them.