S. Gentil et al., Growth and properties of transparent Pb(Zn-1/3, Nb-2/3)O-3-PbTiO3 single crystals with a cubic habitus, JPN J A P 1, 39(5A), 2000, pp. 2732-2735
Transparent single crystals of Pb(Zn-1/3, Nb-2/3)O-3-PbTiO3 (PZN-PT) perovs
kite have been grown by the slow cooling method in a temperature gradient f
urnace. The optimization of growth techniques to crystallize PZN-PT with a
cubic habitus is described in details. The growth temperature range and coo
ling rates was carried out in different lead fluxes, Crystal recovery from
the residual flux was obtained by different techniques based on liquid flux
elimination at the end of the growth process. The best transparent single
crystals of PZN-PT, obtained by a cooling at 0.8 degrees C/h from 1150 degr
ees C to 930 degrees C, had a cubic habitus and a size of approx.: 4 x 4 x
2.5 mm(3). The chemical composition and the homogeneity of the crystals wer
e tested by electron probe micro-analysis. Crystals characterization was pe
rformed using polarized light microscopy and dielectric and piezoelectric m
easurements. Phase transitions were determined by differential scanning cal
orimetry, optical and dielectric measurements.