THE EFFECT OF GROWTH-CONDITIONS ON THE DIELECTRIC-PROPERTIES OF PB(ZN1 3NB2/3)O-3 SINGLE-CRYSTALS/

The effect of growth conditions on the dielectric properties and ferro electric transition of perovskite Pb(Zn1/3Nb2/3)O-3 single crystals wa s examined, Crystals were grown bg the flux technique using PbO as a s elf nux. Increased cooling rate and soaking temperature resulted in a decreased Zn/Nb ratio, and corresponding increased temperature of the maximum dielectric constant (T-max), and decreased room temperature va lues of the dielectric constant and loss. Different crystal colors and quality were also associated with the various growing conditions. Alt hough dielectric properties: domain stability after poling, and associ ated piezoelectric properties are a function of T-max, it was shown th at crystal quality was critical for the observed variation in these pr operties.