【摘要】 本文介绍了新的四角钨青铜型结构铁电体(K_1-xNa_x)_0.4(Sr_1-yBa_y)_0.8Nb₂O₆ 系列单晶由 Czo-chralski 技术生长的条件,指出控制适当的转速和拉速可以得到无条纹的单晶;为了获得大的晶体,固-液界面处必须有足够的温度梯度。实验发现了极化后的样品铁电滞后回线的蜕化现象。用化学腐蚀方法成功地观察到退极化单晶具有方柱状的畴结构。更多还原

【Abstract】 The typical conditions of Czochralski growth of a new ferroelectric single crystal seriesof (K_1-xNa_x)_0.4 (Sr_1-y-Ba_y)_0.8Nb₂O₆ with tungsten bronze type structure were described.A non-striated single crystal was obtained by proper control of crystal-rotation rate and pullingrate. For growth of large crystal, an ample temperature gradient at the solid-liquidinterface has to be maintained.It was discovered that there occured a recession of the ferro-electric hysteresis loop in a polarized sample. The ferroalectric domain structure of adispoled single crystal with square columns has been successfully observed by SEM techni-que after chemical etching.更多还原