Integrated study of morphology, structure, and dielectric behavior in PZT-SASF ceramics at the morphotropic phase boundary

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.496

Bahia Messai , Rachid Makhloufi , Ahcen Keziz , Aymen Benmakhlouf , Mourad Nouiri , Taha Abdel Mohaymen Taha

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Abstract

This research explores the synthesis and electrical characterization of SrF₂-modified lead zirconate titanate Pb_1-xSr_x[(Zr_0.43Ti_0.52) (Al_0.5Sb_0.5)_0.05]O_3-xF_2x, referred to as PZT-SASF ceramics. The synthesis was completed using solid-state methods, focusing on properties near the morphotropic phase boundary (MPB). The samples were analyzed using various laboratory techniques. Phase formation was studied using powder X-ray diffraction (XRD). This analysis revealed the coexistence of tetragonal and rhombohedral phases. Microstructural examination with scanning electron microscopy (SEM) showed a non-uniform distribution of large grains and some micro-sized pores. Impedance and electric modulus measurements were performed over a frequency range of 0.1 kHz–1 MHz and temperatures from 300 to 700 K. The results demonstrated the influence of grain structure on capacitive and resistive properties. The Nyquist plot revealed how grains contribute to resistance and capacitance. An appropriate electrical circuit was used for equivalent circuit analysis. Fitting procedures were implemented across all temperatures to determine grain resistance and capacitance values. Incorporating Sr²⁺ ions at the Pb-site and F⁻ ions at the O-site enhanced the dielectric constant at higher temperatures. Finally, the activation energy of the synthesized ceramics increased from 0.7 eV at x = 0.0 to 1.12 eV at x = 0.08 and then decreased to 0.97 eV at x = 0.1.

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PZT-SASF陶瓷的形态、结构和介电行为在相变相界的综合研究

本研究探索了srf2修饰的锆钛酸铅Pb1-xSrx[(Zr0.43Ti0.52) (Al0.5Sb0.5)0.05]O3-xF2x（简称PZT-SASF陶瓷）的合成及电学表征。采用固态法完成了合成，重点研究了相变相边界（MPB）附近的性能。用各种实验室技术对样品进行了分析。用粉末x射线衍射（XRD）研究了相的形成。这一分析揭示了四方相和菱形相的共存。显微组织扫描电镜（SEM）显示，大晶粒分布不均匀，并有一些微孔。阻抗和电模量测量的频率范围为0.1 kHz-1 MHz，温度范围为300至700 K。结果表明，晶粒结构对材料的电容和电阻性能有影响。奈奎斯特图揭示了晶粒对电阻和电容的影响。采用合适的电路进行等效电路分析。在所有温度下执行拟合程序，以确定晶粒电阻和电容值。在pb位点加入Sr2+离子，在o位点加入F−离子，提高了高温下的介电常数。最后，合成陶瓷的活化能从x = 0.0时的0.7 eV增加到x = 0.08时的1.12 eV，再降到x = 0.1时的0.97 eV。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.