Humidity sensing properties of (Na0.5Bi0.5)0.94Ba0.06 TiO3 lead-free ferroelectrics ceramics

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos221014015k

S. Kennour, N. Lamrani, A. Chaouchi, Y. Lorgouilloux, M. Rguiti, C. Courtois

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Abstract

In this study, the humidity detection properties of the ceramic with composition (Na0.5Bi0.5)0.94Ba0.06TiO3, noted (NBT-06BT), were investigated. The NBT-06BT ceramic was synthesized by the semi-solid method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The NBT-BT ceramic material sintered at 1100?C, crystallizes in the tetragonal system without any secondary phase and presents a heterogeneous distribution of polyhedral shaped grains with open intergranular porosities. The electrical and dielectric properties investigations show that the NBT-06BT ceramic material exhibits excellent humidity detection characteristics such as high sensitivity, good linearity and narrow hysteresis. The impedance decreases by three orders of magnitude when the relative humidity increases from 15 % to 90 % at 100 Hz. The maximum hysteresis value of the sensor is 4.69 % RH. The response time and the recovery time are about 68 s and 125 s respectively. Moreover, the sensing mechanism has been discussed in detail by analyzing the complex impedance spectra. These results indicate the potential application of the ceramic material NBT-06BT as a humidity sensor.

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(Na0.5Bi0.5)0.94Ba0.06 TiO3无铅铁电陶瓷的感湿性能

本文研究了以(Na0.5Bi0.5)0.94Ba0.06TiO3为组分(NBT-06BT)的陶瓷的湿度检测性能。采用半固态法制备了NBT-06BT陶瓷，并用x射线衍射仪(XRD)和扫描电镜(SEM)对其进行了表征。NBT-BT陶瓷材料在1100℃下烧结。C，在四方体系中结晶，没有任何二次相，呈多面体状晶粒的非均质分布，晶间孔隙开敞。电学和介电性能研究表明，NBT-06BT陶瓷材料具有灵敏度高、线性好、滞后小等优异的湿度检测特性。在100hz下，当相对湿度从15%增加到90%时，阻抗降低3个数量级。该传感器的最大滞回值为4.69% RH。响应时间约为68 s，恢复时间约为125 s。此外，通过对复合阻抗谱的分析，对传感机理进行了详细讨论。这些结果表明了NBT-06BT陶瓷材料作为湿度传感器的潜在应用前景。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.