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Barium titanate is a typical perovskite structure compound and the most commonly used dielectric material for multilayer ceramic capacitors (MLCC). The complex compounds obtained by doping single or multiple elements are suitable for applications such as capacitors, sensors, and memories. Due to the inherent ability of the perovskite structure to carry ions of different radii, a large number of different dopants can be contained in the barium titanate lattice to adjust its electrical properties. Multilayer ceramic capacitors based on base metal electrodes are usually sintered in a reducing atmosphere to prevent nickel electrodes from being oxidized during high-temperature sintering. However, the undoped barium titanate is reduced during the sintering process and the electrical resistance is greatly reduced. Acceptor doping can effectively reduce resistance degradation, but barium titanate is more prone to resistance degradation in a high electric field environment. This project aims to develop a new dielectric ceramic based on barium titanate that can be used in high temperature and high electric field environments. This can broaden the application scenarios of MLCC and also expand the operating temperature range of integrated circuits and other capacitor-containing devices.
Faculty of EngineeringThe University of Nottingham University Park Nottingham, NG7 2RD
email:AdvMaterials@nottingham.ac.uk