Development of Thin Film Production Process for Lanthanum Silicate Oxyapatite Electrolyte By Tape Casting Method

摘要

Lanthanum silicate oxyapatite (LSO) has attracted attentions for applications as solid electrolyte of solid oxide fuel cells (SOFCs) and chemical sensors due to its high oxide ion conductivity along to the c-axis. For applications as solid electrolyte of SOFC and chemical sensors, thin and dense electrolyte is preferable because of lower resistance of the electrolyte. Among thin film production processes, tape casting method has an advantage to produce large area thin film ceramics with low cost. In this research, we developed the tape casting process for LSO thin film electrolyte production. The conditions for preparation of slurry and sintering temperature were optimized in order to produce a dense thin film electrolyte without cracks.