La1-xCaxMnO3薄膜微观结构、电学性能和横向热电性能的高温演化

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

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.153

Xi Chen , Bowan Tao , Ruipeng Zhao , Kai Yang , Zhenzhe Li , Tian Xie , Mingyuan Zhao , Guoliang Ming , Yuhang Yu , Hongbo Tian , Chang Wei , Hongxu Zhu , Yudong Xia

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引用次数: 0

摘要

高频热流密度测量对于高超声速飞行器热防护系统的设计至关重要。基于横向热电效应的La1-xCaxMnO3 （LCMO）薄膜热流传感器由于其高频响应特性而具有显著的优势。针对极高温环境，揭示了LCMO薄膜的微观结构和横向热电性能的高温演变。在热处理温度不超过1300℃的条件下，LCMO能保持稳定的电学性能和横向热电性能，灵敏度为~ 8 μV/(kW/m2)，响应频率为~ 220 kHz。随着温度的升高，由于原子的扩散、聚集和逸出，LCMO薄膜的电性能逐渐恶化，响应速度变慢。但LCMO经1450℃热处理1 h后仍保持正常的横向热电性能，表现出较强的存活能力。该工作为高温LCMO薄膜热流通量传感器的研制和应用奠定了基础。

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High-temperature evolution of microstructure, electrical properties and transverse thermoelectric performance in La1-xCaxMnO3 thin films

High-frequency heat flux measurement is vital for the design of the hypersonic vehicle thermal protection system. La_1-xCa_xMnO₃ (LCMO) thin-film heat flux sensor based on the transverse thermoelectric effect has significant advantages due to its high-frequency response characteristics. Aiming at extremely high-temperature environments, the high-temperature evolution of microstructure and transverse thermoelectric performance of LCMO thin film are revealed. With the heat treatment temperature not beyond 1300 °C, LCMO can maintain stable electrical properties and transverse thermoelectric properties, with a sensitivity of ∼8 μV/(kW/m²) and response frequency of ∼220 kHz. With the increase in temperature, the electrical properties of LCMO thin films gradually deteriorate due to atom diffusion, aggregation and escape, so the response speed slows. But LCMO still maintains normal transverse thermoelectric properties after heat treatment with 1450 °C for 1 h, showing strong survivability. This work lays a foundation for developing and applying high-temperature LCMO thin-film heat flux sensors.

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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.