**7. Conclusions**

This chapter presents the investigation on the fabrication and characterization of sample groups of PZT-based ceramics and the relaxor PZN-PMnN ferroelectric materials with perovskite structure. The B-site oxide mixing technique reported in this study is simple, produces large quantities, and is easy to reproduce. Experimental results showed that the electrical properties of *x*Pb(ZryTi(1−y)) O3-(0.925 − *x*)Pb(Zn1/3Nb2/3)O3-0.075Pb(Mn1/3Nb2/3)O3 ceramics are optimal at a Pb(ZryTi(1−y))O3 content of 0.8 mol and Zr/Ti ratio of 48/52. At these contents, the ceramics have good electrical properties: *d*31 = 140 pC/N, *k*p = 0.62, *k*t = 0.51, *Q*m = 1112, tan *δ* = 0.005, and *P*r = 34.5 μC/cm<sup>2</sup> . Investigation of the domain structure of the two ferroelectric phases (tetragonal and rhombohedral) in the PZT-PZN-PMnN with compositions at near the MPB is described as follows: the 90 and 180° domains exist in the tetragonal phase, while 71, 109, and 90° domains are located in the rhombohedral phase. The widths of these domains were about 100 nm. The hysteresis loops of the ceramics exhibited excellent temperature stability due to the broad diffusive phase transition between the nonergodic and

*The Investigation on the Fabrication and Characterization of the Multicomponent Ceramics… DOI: http://dx.doi.org/10.5772/intechopen.93534*

ergodic relaxor states that coexisted over a wide temperature range, which makes it as a promising material for high-intensity ultrasound applications.
