掺杂lacro3 /Al2O3高温热电偶复合材料的热电性能及稳定性表征

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-04-12 DOI:10.1016/j.sna.2025.116569

Javier A. Mena, Katarzyna Sabolsky, Anthony A. Abrahamian, Konstantinos A. Sierros, Edward M. Sabolsky

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引用次数: 0

摘要

基于电子陶瓷的厚膜热电偶是为了在恶劣环境中进行精确的温度监测而开发的，利用掺杂LaCrO3钙钛矿陶瓷，以其在高温下的化学稳定性和热电性能而闻名。研究了LaCrO3 （LC）、La1-xSrxCrO3 （LSCx）、La1-xCaxCrO3 （LCCx）和La0.8Sr0.2Cr1-xMnxO3 (LSCMx)（0.1 ≤x ≤ 0.3）组成，并在Al2O3衬底上进行了打印。在温度高达900 °C的空气中进行热电表征，结果表明Sr、Ca和Sr/ mn掺杂镧铬铁矿的本征塞贝克系数在150 μV/K到380 μV/K之间。所制备的热电偶表现出稳定、线性和可重复的温度依赖性热电电压响应。最敏感的热电偶是LC//LCC30和LC//LSC30，有效塞贝克系数分别为222.32 μV/K和201.10 μV/K。合成了LC和掺杂Al2O3的LC复合材料，提高了烧结性能和长期稳定性。XRD和XPS分析表明，由于高温反应性，形成了少量的二次相和新的固溶体。电导率随Al2O3含量的增加而降低，LCC30-Al2O3 // LC-Al2O3对热电电压具有良好的线性响应和较高的灵敏度，当Al2O3体积分数在10% ~ 30%之间时，有效塞贝克系数分别为230.34 ~ 255.21 μV/K。这些实验证明了“全陶瓷”热电偶作为贵金属热电偶的替代品，在极端条件下监测温度的潜力。

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Thermoelectric properties and stability characterization of doped-LaCrO3/Al2O3 composites for high-temperature thermocouples

Electroceramics-based thick film thermocouples were developed for accurate temperature monitoring in harsh environments, utilizing doped LaCrO₃ perovskite ceramics known for their chemical stability and thermoelectrical properties at high temperatures. LaCrO₃ (LC), La_1–xSr_xCrO₃ (LSCx), La_1–xCa_xCrO₃ (LCCx), and La_0.8Sr_0.2Cr_1-xMn_xO₃ (LSCMx) (0.1 ≤ x ≤ 0.3) compositions were investigated and printed on Al₂O₃ substrates. Thermoelectric characterization in air up to 900 °C revealed intrinsic Seebeck coefficients ranging from 150 μV/K to 380 μV/K for variable substitution levels of Sr, Ca, and Sr/Mn-doped lanthanum chromites. The fabricated thermocouples exhibited stable, linear, and reproducible temperature-dependent thermoelectric voltage responses. The most sensitive thermocouples were LC//LCC30 and LC//LSC30 showing effective Seebeck coefficients of 222.32 μV/K and 201.10 μV/K, respectively. Composites of LC and doped-LC with Al₂O₃ were synthesized to enhance sinterability and long-term stability. XRD and XPS analyses revealed low-level formation of secondary phases and new solid solutions due to high-temperature reactivity. Electrical conductivity decreased with Al₂O₃ content, and thermoelectrical voltage for LCC30–Al₂O₃//LC–Al₂O₃ couples exhibited good linear responses and high sensitivities, with effective Seebeck coefficients ranging from 230.34 μV/K to 255.21 μV/K for Al₂O₃ volume fractions between 10% and 30%, respectively. These experiments demonstrate the potential of "all-ceramic" thermocouples for monitoring temperature in extreme conditions as an alternative to precious metal thermocouples.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...