首页> 外文期刊>Acta Crystallographica, Section B. Structural science, crystal engineering and materials >Structural changes of relaxor ferroelectric Sr_(0.52)Ba_(0.48)Nb_2O_6 (SBN52) on quenching and reheating
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Structural changes of relaxor ferroelectric Sr_(0.52)Ba_(0.48)Nb_2O_6 (SBN52) on quenching and reheating

机译:淬火和再加热的松弛剂铁电SR_(0.52)BA_(0.48)NB_2O_6(SBN52)的结构变化

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摘要

Quenching of Sr_(0.52)Ba_(0.48)Nb_2O_6 (SBN52) from temperatures above 700°C causes small modifications in the strontium distribution over the large cation sites (Me1 and Me2), changed off-centre shifts of the Nb atoms and slightly increased modulation amplitudes. The higher disorder of cation incorporation can explain the enhanced ferroelectric properties. The quenched structural disorder can be healed by reheating followed by slow cooling. A change of the modulation dimension on quenching such as for Ca_xBa_(1-x)Nb_2O_6 (CBN) mixed crystals was not observed.
机译:从700℃的温度的温度淬火SR_(0.52)BA_(0.48)Nb_2O_6(SBN52)在大阳离子位点(ME1和ME2)上的锶分布中的微小修饰,改变了NB原子的偏移偏移并略微增加 调制幅度。 阳离子掺入紊乱可以解释增强的铁电性能。 通过再加热,淬火结构障碍可以愈合,然后缓慢冷却。 未观察到淬火的调制尺寸的变化,例如Ca_xba_(1-x)nb_2O_6(Cbn)混合晶体。

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