Julian Fanghanel, Satoshi Yokomizo, Shuichi Funahashi and Clive A. Randall
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Cold sintering of nickel manganese oxide for thermistor fabrication
In this paper we successfully densified NiMn2O4 (NMO) ceramics using the cold sintering process (CSP) with various molten salt fluxes as a transient liquid phase, achieving relative densities exceeding 95%. The resulting samples exhibited comparable properties to conventionally sintered counterparts, demonstrating the feasibility of the CSP for NMO thermistor production. Electrical characterization revealed NMO samples sintered via CSP exhibited negative temperature coefficient (NTC) behavior with material constants (B) and temperature coefficients of resistivity (α) akin to conventionally sintered materials in the range of 3500–4300 K and 0.04–0.05 K−1. Despite slightly higher resistances attributed to differences in grain size and impurities, the CSP-produced NMO samples remained within the typical range for NTC thermistors.
期刊介绍：
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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