Work

Effect of doping-induced MnO6 distortion on the phase transition temperature and emissivity of LaMnO3-based materials

Year: 2025

Type: article

Abstract: Large variable emissivity materials play a key role in smart thermal control. However, conventional variable emissivity materials have limitations, including insufficient variability and unclear understanding of how phase-change temperature and emissivity variation relates. In this study, LaMnO 3 -based (ABO 3 ) perovskite materials doped with ions of varying radii were prepared. Among them, La 0.7 Ba 0.2 Cd 0.1 MnO 3 showed a variable emissivity of 0.467 and a Curie temperature of 290 K. Combining experimental studies with density functional theory calculation reveals that the mechanism for tuning the Curie temperature is linked to the displacement of A-site ions, resulting from the distortion of the MnO 6 octahedron . Besides, the variable emissivity mechanism is explained by the densities of states , which decrease as Mn-O bond strength increases. This work explores the mechanism of phase transition temperature and emissivity changes from an intrinsic crystal structural perspective and will provide theoretical foundations for improving variable emissivity properties of smart thermal control systems.

Source: Journal of the European Ceramic Society

DOI: 10.1016/j.jeurceramsoc.2025.117318

Authors: Xinru Yang, Zhiyuan Zhao, Liping Tong, Zhongyang Wang, Xiao Zhou, Tongxiang Fan

Institutions: Shanghai Jiao Tong University, State Key Laboratory of Metal Matrix Composites, Shanghai Dianji University

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,900

Funders: National Natural Science Foundation of China, Shanghai Municipal Education Commission