PbTiO_3単結晶の育成と電気的性質に及ぼすSrO添加効果

概要

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PbTiO_3 single crystals with SrO additive (< 0.5 wt%) were grown by a flux cooling technique. The electrical measurements were carried out by using as-grown crystals of PbTiO_3 with 0.4 wt% SrO. In summary, (1) The addition of SrO remarkably effected on the crystal size and the yield of PbTiO_3. E specially, it was available for improving the crystal perfection of PbTiO_3. (2) The resulting crystals was platelet (1.6×1.6×0.2 mm) in shape and yellow-brown with highly transparent. (3) According to the X-ray diffraction, little change of axial ratio c/a was observed with increasing SrO content. (4) The arrhenius plot of ad. indicated that the conductivities were represented as the following equations; σ = 3.1 x l0^3 exp(-0.2/kT) [25°-150℃], σ =3.1 x l0^3 exp(-1.5/kT) [150° -500℃]. (5) Above 300℃, the non-ohmic behavior was observed in the I- V characteristic curves. And the threshold value V_H decreased with increasing temperature.
1991-05-01