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首页> 外文期刊>Journal of Crystal Growth >Growth and domain structures of novel piezoelectric crystals Pb(In_(1/2)Nb_(1/2))
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Growth and domain structures of novel piezoelectric crystals Pb(In_(1/2)Nb_(1/2))

机译：新型压电晶体Pb（In_（1/2）Nb_（1/2））的生长和畴结构

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摘要

Large Pb(In_(1/2)Nb_(1/2))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 (PIMNT) crystals with the size of Φ55×100 mm have been successfully grown by the Bridgman method. The as-grown PIMNT crystals not only show excellent piezoelectric properties but also high Curie temperature, high rhombohedral-tetragonal phase transition temperature and high coercive field. Domain structure and phase transition process of PIMNT crystals were observed in-situ by means of polarizing light microscopy (PLM). As for the rhombohedral PIMNT crystals, the rhombohedral-tetragonal phase transition and the ferroelectric to paraelectric phase transition could be observed obviously in the heating procedure whereas these phase transitions could not be seen clearly in the successive cooling procedure. As for the tetragonal PIMNT crystals, the ferroelectric to paraelectric (T-C) phase transition could be observed obviously in both the heating and cooling procedures. This may attribute to the difference in the relaxor ferroelectrics and normal ones.
机译：已经生产出尺寸为Φ55×100 mm的大Pb（In_（1/2）Nb_（1/2））O_3-Pb（Mg_（1/3）Nb_（2/3））O_3-PbTiO_3（PIMNT）晶体通过Bridgman方法成功生长。所生长的PIMNT晶体不仅具有出色的压电性能，而且还具有居里温度高，菱形-四方相变温度高和矫顽场高的特点。通过偏振光显微镜（PLM）就地观察了PIMNT晶体的畴结构和相变过程。对于菱形PIMNT晶体，在加热过程中可以明显观察到菱形-四方相变和铁电至顺电相变，而在随后的冷却过程中这些相变则看不到。对于四方PIMNT晶体，在加热和冷却过程中都可以明显观察到铁电至顺电（T-C）相变。这可能归因于张弛铁电体与普通铁电体的不同。

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