チタン酸バリウム添加チタン酸ビスマスナトリウムのチタン酸ストロンチウム基板上への液相エピタキシ成長(<特集>セラミックスインテグレーション)

概要

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Single crystals of sodium bismuth titanate, (Na,Bi)TiO_3 (NBT), and its solid solutions were grown by a liquid phase epitaxy (LPE) using strontium titanate, SrTiO_3 (ST), single crystals as substrates. X-ray diffraction measurements and polarized optical images revealed that the crystals could be epitaxially grown on both the (001) face and the (111) face of the ST substrate. However, due to lattice mismatch, the grown crystals had a multi-domain structure with domain boundaries at both 90 and 1800° The NBT crystals grown by using unsealed platinum pan had an inhomogeneous chemical composition, while homogeneous crystals were grown by using sealed platinum capsules for the growth cell. It is concluded from the results of several experiments on inter-diffusion between the substrate and the grown crystal that liquid phase epitaxy is appropriate for the growth of NBT.
2002-05-01