Growth and Ferroelectric/Piezoelectric Properties of (K,Na)(Nb,Ta)O3 Ferroelectric Single Crystals
2013 ◽
Vol 566
◽
pp. 64-67
◽
Keyword(s):
X Ray
◽
Single crystals of (K,Na)Nb1-xTaxO3(KNNT) were grown by the top-seeded solution growth (TSSG) method under high oxygen pressure atmosphere (Po2= 0.9 MPa), and their dielectric properties were investigated along [10cubic(the cubic notation). KNNT single crystals in a composition range of 0x0.65 were successfully obtained. Through the measurements of x-ray diffraction and dielectric properties, we propose a temperature (T)-composition (x) phase diagram in the KNNT system in which a successive phase transition from orthorhombic (Amm2), tetragonal (P4mm) to cubic (Pmm) occurs with increases inTandx.