Structural, Microstructural, and Electrical Properties Study of Pb(Sn0.45Ti0.55)O3 Ceramics

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

ECS Journal of Solid State Science and Technology Pub Date : 2024-05-10 DOI:10.1149/2162-8777/ad458a

Bhakti Pada Das, Bhabani Sankar Patnaik, Tanmaya Jena, Sailabhama Nayak, Geetanjali Nayak, Krishnamayee Bhoi, Uttam Sahu, Prasanta Kumar Mahapatra, Ram Naresh Prasad Choudhary, Subrata Karmakar, Hari Sankar Mohanty

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引用次数: 0

Abstract

We undertook a comprehensive investigation of the the structural, dielectric, and electrical characteristics of Pb(Sn_0.45Ti_0.55)O₃ ceramics prepared using the conventional solid-state route. A meticulous preparation protocol, involving solvating various precursors, was followed by extensive characterization employing X-ray diffraction, scanning electron microscopy, and dielectric studies. The synthesized sample features a single-phase tetragonal structure with P4mm symmetry. Using impedance spectroscopy, electrical transport properties of the polycrystalline Pb(Sn_0.45Ti_0.55)O₃(PST) ceramic were studied in detail. Relaxation and conduction mechanisms of the material were inferred using complex impedance, complex electric modulus, and frequency dependent ac conductivity analysis. Impedance spectroscopy results reveal the range of frequencies in which the grain, grain boundary, and electrode effects are dominant. Above certain temperatures, the imaginary component of impedance (Z^//) exhibits some resonant type peaks at different frequencies indicating relaxor nature of the sample. The activation energy obtained for both the relaxation and conduction process indicates the role of doubly-ionized oxygen vacancy in the conduction mechanism of the sample. The dielectric relaxation occurring at low frequency and high temperatures is related to the space charges associated with the ionized oxygen vacancies being trapped at the grain boundaries. The Cole-Cole plots confirm the poly-dispersive nature of dielectric relaxation in the sample.

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Pb(Sn0.45Ti0.55)O3 陶瓷的结构、微观结构和电性能研究

我们对采用传统固态路线制备的 Pb(Sn0.45Ti0.55)O3 陶瓷的结构、介电和电气特性进行了全面研究。制备过程非常细致，包括溶解各种前驱体，然后利用 X 射线衍射、扫描电子显微镜和介电研究进行了广泛的表征。合成的样品具有 P4mm 对称的单相四方结构。利用阻抗光谱详细研究了多晶 Pb(Sn0.45Ti0.55)O3(PST)陶瓷的电传输特性。利用复阻抗、复电模量和随频率变化的交流电导率分析，推断了材料的弛豫和传导机制。阻抗光谱结果显示了晶粒、晶界和电极效应占主导地位的频率范围。在特定温度以上，阻抗的虚分量（Z//）在不同频率上会出现一些共振峰，表明样品具有弛豫特性。弛豫和传导过程中获得的活化能表明，样品的传导机制中存在双电离氧空位。在低频和高温下发生的介电弛豫与被困在晶界的电离氧空位的空间电荷有关。科尔-科尔图证实了样品介电弛豫的多分散性。

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来源期刊

ECS Journal of Solid State Science and Technology MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED

CiteScore

4.50

自引率

13.60%

发文量

455

期刊介绍： The ECS Journal of Solid State Science and Technology (JSS) was launched in 2012, and publishes outstanding research covering fundamental and applied areas of solid state science and technology, including experimental and theoretical aspects of the chemistry and physics of materials and devices. JSS has five topical interest areas: carbon nanostructures and devices dielectric science and materials electronic materials and processing electronic and photonic devices and systems luminescence and display materials, devices and processing.