Review on the synthesis routes of nickel manganite – a potential material for thermistor applications

Nickel manganese oxide (NiMn₂O₄) is a versatile mixed metal oxide with a range of potential applications across various fields. It belongs to the spinel structure family, characterized by a cubic crystal structure with specifically arranged cationic and anionic lattice sites. Nickel manganite is a ceramic material that can be produced in miniaturized form using various fabrication processes. This article aims to explore the suitability of this material for various applications, particularly in NTC thermistors. Thermistor materials are widely used in sensing applications in science, engineering, and technology. They are applied in time delay circuits, device protection, voltage regulation, speech volume control, testing equipment for ultra-high-frequency power, and detecting very small amounts of radiant energy. This review seeks to provide valuable insights into the synthesis strategies for nickel manganite, guiding researchers and experts by offering useful information on the appropriate methods for fabricating nickel manganite to meet the specific requirements of NTC thermistors in sensing applications. The article discusses in detail the various synthesis techniques of nickel manganite and how these techniques influence its structure and other properties.