Structural, dielectric, impedance, and ferroelectric studies of LiNbO3-doped K0.5Na0.5NbO3 ceramics

Currently, sophisticated advanced electronics require ferroelectric materials with high dielectric response. Lead-free (1 -x)K0.5Na0.5NbO3-xLiNbO3(KNN-xLiN) ceramics with x = 0.01, 0.03, and 0.05 were produced using a solid-state method, resulting in a greater dielectric constant, a lower impedance, and an increased conductivity. Compared to conventional ferroelectrics, KNN-0.01LiN ceramics have a greater activation energy (E- r e l) of 1.33 eV and a large sigma(a c )value of 10( - 3 )- 10 S- 2 /m in the frequency range of 20 Hz-1 MHz. The peak that corresponds to the orthogonal-tetragonal (T (O - T)) phase shifts toward the lower temperature side and the peak that corresponds to TT - C shifts toward the higher temperature side as dopant percentage increases in the KNN-xLiN ceramics. The observed data may provide light on a key member of the team involved in the creation of upgraded ferroelectrics with improved performance. This result sheds light on the process underlying the improved characteristics of K0.5Na0.5NbO3-based ceramics and may lead to the development of high performance ferroelectrics that will benefit a variety of functional materials.