Abstract
The PZT-PMN ceramics system proposed for piezoelectric transformation application was derived from Pb(Zr 0.52 Ti 0.48 )O 3 and Pb(Mg 0.66 Nb 0.33 )O 3 based compositions that obtained from the culombite method. The effect of MnO 2 addition on microstructure, physical properties and piezoelectric properties were investigated. The XRD results show that no phase transformation observed for all sintered PZT-PMN samples doped with MnO 2 . Presence of MnO 2 also improved their sinterability of the ceramics as evidenced by SEM micrographs. Though, MnO 2 addition tends to lower the dielectric constant in this ceramics but it improved Q m from 115 to a maximum value of 1669 in the ceramic with 8 mol% of MnO 2 . Also, increasing of d 33 from 28.53 to 114.19 pC/N was found for MnO 2 in range 0 to 4 mol%. However, the k p values are clearly increased with increasing of MnO 2 content.
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