Fluorescence properties and structures of firing corbicula japonica shells

Abstract

Crystal structure and fluorescence properties for corbicula japonica shells were researched for the purpose of an application to functional materials. Corbicula japonica shells were heat-treated at 200 to 1000°C. The crystal structure of the specimens heat-treated less than 300°C was aragonite CaCO₃, that heat-treated at 400~600°C was calcite CaCO₃ and that heat-treated at 800~1000°C was CaO. All the specimens showed a fluorescence property with the broad peak at 400~500 nm, and the specimens heat-treated at 800~1000°C showed orange color fluorescence with the peak at 594 nm attributed to Mn activator.