摘要
在三方铁电（ＦＥ）四方反铁（ＡＦＥ）的准同型相界附近制备了一系列组份为（Ｐｂ０９７Ｌａ００２）（Ｚｒ１－ｘ－ｙＳｎｙＴｉｘ）Ｏ３（ｘ＝００９或０１；０１６≤ｙ≤０３８）的反铁电陶瓷．研究了Ｓｎ含量ｙ对电场诱导ＡＦＥ→ＦＥ相变电场Ｅｃ、反铁电双电滞回线损耗ΔＥ、以及温度诱导ＦＥ→ＡＦＥ相变温度ＴＦＥ，ＡＦＥ→顺电（ＰＥ）相变温度Ｔｃ的影响．沿ＡＦＥＦＥ相界Ｔｉ含量一定的条件下，Ｅｃ随着Ｓｎ含量ｙ的增加而增大，ΔＥ减小，ＴＦＥ与Ｔｃ均降低．场诱相变的回线参量Ｅｃ，ΔＥ与相变温度ＴＦＥ和Ｔｃ相关联．在直流偏压下用原位Ｘ射线衍射表征了相变时晶格结构的变化，结果表明，当电场达到ＡＦＥ→ＦＥ相变临界场时，伴随相变的发生，晶格结构由四方相转变为三方相。
AbstractWe have prepared antiferroelectric ceramics with compositions of (Pb0.97La0.02)(Zr1-x-ySnyTix)O 3(x=0.09 or 0.1; 0.16≤y≤0.38) near antiferroelectric (AFE)tetragonalferroelectric (FE)rhombohedral morphotropic phase boundary. The effects of Sn content on electric fieldinduced AFE→FE switching field Ec, double hysteresisloop width ΔE, and temperatureinduced FE→AFE phase transition temperature TFE, AFE→paraelectric (PE) transition temperature Tc are investigated. At constant Ti content x, both TEF and Tc decrease with increase of Sn content y. Electric hysteresis loop measurement demonstrates an increase of Ec and decrease of ΔE when Sn content y increases. Furthermore, we also find that Ec and ΔE are related with TFE and Tc. In situ X-ray diffraction under dc bias field shows that symmetry changes from tetragonal phase to rhombohedral phase with an increase of c axis,and an increase of lattice volume.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第10期1727-1733,共7页
Acta Physica Sinica
