Dielectric and Thermal Behavior of Polystyrene/Sr2TiMnO6 (STMO) Composites

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2021-04-03 DOI:10.1080/0371750X.2021.1888806

A. Ashokbabu, P. Thomas

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引用次数: 1

Abstract

Materials with high dielectric permittivity are in demand due to their potential applications in microelectronics, capacitors and related fields. Polymer/ceramic composites, due to their improved properties, can be studied to meet this demand. In this work, high permittivity double perovskite Sr2TiMnO6 (STMO) ceramics were synthesized by solid state reaction route and polystyrene (PS) composite thick films (∼200 μm) with up to 50 vol% loading of STMO were prepared by solution casting technique. The composite films were characterized using X-ray diffraction and Fourier transform infra-red spectroscopy for their structural properties. Microstructure of the composites was examined using scanning electron microscopy. Thermal behavior was studied using differential scanning calorimetry and thermo-gravimetric analysis. Dielectric properties, such as permittivity, loss and AC conductivity were measured using a dielectric impedance analyzer. Permittivity and dielectric loss of the base polymer were found to increase with the addition of STMO. Glass transition for composites shifted to higher temperature than that of pure PS. The composites exhibited enhanced thermal stability and these composite films can be explored as dielectric materials for capacitor applications. GRAPHICAL ABSTRACT

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聚苯乙烯/Sr2TiMnO6 (STMO)复合材料的介电和热行为

具有高介电常数的材料由于其在微电子、电容器和相关领域的潜在应用而受到需求。聚合物/陶瓷复合材料由于其性能的改善，可以进行研究以满足这一需求。本工作通过固态反应路线合成了高介电常数双钙钛矿Sr2TiMnO6（STMO）陶瓷，并通过溶液浇铸技术制备了负载量高达50vol%的聚苯乙烯（PS）复合厚膜（～200μm）。利用X射线衍射和傅立叶变换红外光谱对复合膜的结构性能进行了表征。用扫描电子显微镜研究了复合材料的微观结构。采用差示扫描量热法和热重分析法对其热行为进行了研究。使用介电阻抗分析仪测量介电特性，如介电常数、损耗和交流电导率。基础聚合物的介电常数和介电损耗随着STMO的加入而增加。与纯PS相比，复合材料的玻璃化转变温度更高。复合材料表现出更强的热稳定性，这些复合膜可以作为电容器应用的介电材料进行探索。图形摘要

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.

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