LASPT stands for Lanthanum Strontium Aluminum Perovskite, which is a type of ion conductive ceramic material. LASPT ceramic sheets are used as substrates in various electronic applications, particularly in solid oxide fuel cells (SOFCs) and other high-temperature electronic devices. These ceramics have high ionic conductivity and thermal stability, making them suitable for use in harsh operating conditions. Additionally, they are also chemically stable, and have low oxygen ion conductivity, making them ideal for use as substrates in high-temperature fuel cells and other electrochemical devices.