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首页> 外文期刊>The European physical journal. Applied physics >Microstructure, dielectric and ferroelectric characterization of Ba doped PLZT ceramics
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Microstructure, dielectric and ferroelectric characterization of Ba doped PLZT ceramics

机译:Ba掺杂PLZT陶瓷的微观结构,介电和铁电特性

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摘要

Ba doped PLZT ceramic compositions with formula Pb0.982-zLa0.012 Delta Ba-0.006(z)( Zr0.55Ti0.45) O-3 for z = 0 to 6 mole% are synthesized by mixed-oxide method. Powder XRD studies indicate the coexistence of rhombohedral and tetragonal phase in 5 mole% Ba doped PLZT composition. SEM pictures show grain size control as Ba concentration increases in PLZT system. epsilon(rt) and tan delta are increased up to 4 mole% and 5 mole% Ba doped PLZT composition respectively. Dielectric maximum ( epsilon(TC)) is decreased to 4 mole% Ba doped PLZT and Curie temperature (T-C) is decreased with increase of Ba concentration in PLZT system. Coercive field (E-c) has shown gradual enhancement over series. Remanent (P-r) and spontaneous (P-s) polarizations are decreased to 5 mole% Ba doped PLZT composition.
机译:通过混合氧化物法合成具有z为0至6摩尔%的式Pb0.982-zLa0.012δBa-0.006(z)(Zr0.55Ti0.45)O-3的Ba掺杂PLZT陶瓷组合物。粉末XRD研究表明,在5摩尔%Ba掺杂的PLZT组合物中,菱面相和四方相共存。 SEM照片显示PLZT系统中随着Ba浓度的增加而进行晶粒尺寸控制。 epsilon(rt)和tanδ分别增加到掺杂Ba的PLZT成分的4摩尔%和5摩尔%。随着PLZT系统中Ba浓度的增加,介电最大值(ε)降低至4摩尔%Ba掺杂的PLZT,居里温度(T-C)降低。矫顽场(E-c)已显示出逐渐增强的序列。剩余极化(P-r)和自发极化(P-s)降低到掺杂Ba的PLZT成分为5摩尔%。

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