Observation of high dielectric constants in x(Pb(Zn1∕3Nb2∕3)O3–(0.2−x)Pb(Ni1∕3Nb2∕3)O3–0.8Pb(Zr1∕2Ti1∕2)O3 ternary solid solutions

In the present work, we demonstrate the results of combining two excellent ferroelectric materials at their morphotropic phase boundary compositions, i.e., 0.2(Pb(Zn1∕3Nb2∕3)O3–0.8Pb(Zr1∕2Ti1∕2)O3 (0.2PZN-0.8PZT) and 0.2Pb(Ni1∕3Nb2∕3)O3–0.8Pb(Zr1∕2Ti1∕2)O3 (0.2PNN-0.8PZT) to form a ternary solid solution of x(Pb(Zn1∕3Nb2∕3)O3–(0.2−x)Pb(Ni1∕3Nb2∕3)O3–0.8Pb(Zr1∕2Ti1∕2)O3 (xPZN-(0.2−x)PNN-0.8PZT) which exhibits superior dielectric properties. Examination of the dielectric spectra indicated that the ternary system exhibits a very high relative permittivity of 49 800 (at 10kHz) for the composition at x=0.10. In addition, an increased amount of PZN was observed to enhance the ferroelectric properties of the system.