Ferroelectric studies for soft Gd-modified PZT ceramics
Ferroelectric studies for soft Gd-modified PZT ceramics
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DOI：
10.1080/01411594.2018.1481213
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发表时间：
2018-06
影响因子：
1.6
通讯作者：
S. C. Panigrahi;P. Das;R. Choudhary
中科院分区：
文献类型：
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作者：
S. C. Panigrahi;P. Das;R. Choudhary
摘要采用传统固相反应法制备了准同型相界附近的钆掺杂锆钛酸铅（Pb 1 −xGdx（Zr 0. 52 Ti 0. 48）1−x/4 O3）（x = 0、0. 07、0. 10和0. 12）（PGZT x/52/48）陶瓷多晶样品。XRD分析表明，产物为单相菱方晶系化合物。样品的SEM织构显示出均匀的晶粒分布。材料的介电常数的频率和温度依赖性表明非弛豫行为和在较高的Gd浓度值的扩散相变的指示。P-E环的温度依赖性证实了材料中的铁电性。样品的压电研究表明，增强的压电系数上取代Gd在铅网站。
ABSTRACT The polycrystalline samples of gadolinium-modified lead–zirconate–titanate (Pb1−xGdx (Zr0.52Ti0.48)1−x/4O3) (x = 0, 0.07, 0.10 and 0.12) (PGZT x/52/48) ceramics near morphotropic-phase boundary were prepared using conventional solid-state reaction route. XRD patterns show the formation of single-phase compounds in rhombohedral crystal system. SEM textures of the samples reveal uniform grain distribution. Frequency and temperature dependence of dielectric constant of the materials indicates non-relaxor behavior and indication of the diffuse phase transition at higher values of Gd concentration. The temperature dependence of P–E loops confirms ferroelectricity in the materials. The piezoelectric studies of the samples show enhancement in piezoelectric coefficients on substitution of Gd at the Pb site.