Sonochemical Synthesis of Dolomite from Removed-K Bittern for Color-Tunable Phosphor Applications

Abstract

This study determines a method for the synthesis of carbonates from removed-K bitterns using ultrasonic cavitation. The results suggest that dolomite （CaMg（CO₃）₂） nanoparticles can be easily synthesized by irradiating ultrasonic waves for 20 min using a removed-K bittern adjusted to a Ca/Mg molar ratio of 0.5. In addition, the immersion method was used to convert dolomite, which emits green or red light, into a phosphor. By changing the mixing ratio of the green- and red-emitting phosphor, it was possible to produce dolomite phosphors with control over emission colors such as green, yellow-green, yellow, orange, and red. These phosphors can be applied as guide lights and interior lights.