NiMn2O4 Ceramic with Bi2O3 as Ablating Aid with Laser Melting Deposition
NiMn<sub>2</sub>O<sub>4</sub> thermosensitive ceramics using Bi<sub>2</sub>O<sub>3</sub> as a low-temperature ablating aid were prepared by laser melting deposition. Analyzing the structural, morphological, and electrical properties of the ceramics revealed important roles of Bi<sub>2</sub>O<sub>3</sub>. The room-temperature resistance decreased gradually with the increasing of the Bi<sub>2</sub>O<sub>3</sub> content, the thermal constant of the ceramics varied from 2870.1 to 3853.2 K, and the activation energy varied from 0.2473 to 0.3320 eV. Furthermore, the alleviation of the aging issue was attributed to the grain growth and the densification of the ceramics due to the addition of Bi<sub>2</sub>O<sub>3</sub> and the corresponding cationic redistribution. As a result, an optimized resistance drifting (∆R/R = 5.72%) of the ceramic was obtained with the addition of Bi<sub>2</sub>O<sub>3</sub>.
Authors
- Shujian Ding
- Weili Wang (ORCID: https://orcid.org/0000-0003-0753-2010)
- Xiang Weng (ORCID: https://orcid.org/0009-0006-6120-1449)
- Guang‐Hui Liu (ORCID: https://orcid.org/0000-0003-0650-3875)
- Wei Ren (ORCID: https://orcid.org/0000-0003-3344-5682)
- Yanhan Yang (ORCID: https://orcid.org/0000-0001-6558-1000)
- Xian-Hai Liu
Institutions
- Northwestern Polytechnical University (CN)
- Xi’an University of Posts and Telecommunications (CN)
Publication Details
- Journal
- Materials
- Published
- 2025-05-30
- DOI
- https://doi.org/10.3390/ma18112571
- Primary Topic
- Electrical and Thermal Properties of Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China