Investigation of phase boundaries in the system (K_xNa_(1 - x)_(1 - y)Li_y(Nb_(1 - z)Ta_z)O_3 using high-throughput experimentation (HTE)

摘要

A high-throughput experimental (HTE) approach starting from dry, fine-grained powders was used to synthesize bulk samples in the system (K_xNa_(1 - x))_(1 - y)Li_y(Nb_(1 - z)Ta_z)O_3, a doped variant of the piezoelectric (K_(0.5)Na_(0.5))NbO_3 (KNN). Starting from the system (K_(0.5)Na_(0.5))_(1 - y)Li_y(Nb_(1 - z)Ta_z)O_3 known from the works of Saito et al. an effort was made to establish a higher order phase diagram. Special emphasis was put on expanding the known morphotropic phase boundary that constitutes a region of special interest for electroceramic materials as it features maximum piezoelectric properties. Analyses were performed using a HTE-compatible technique, namely automated powder X-ray diffraction (XRD).