2.2.3. Laser Diffraction Particle Size Analysis

The particle size was determined using a laser diffraction particle size analyzer (Mastersizer3000, Malvern Panalytical, Malvern, UK) in the Korea Institute of Geoscience and Material Resources. The talc in an aqueous colloid solution was dispersed for 10 min using a 28 kHz ultrasonic dispersing machine.
