Evaluation of Heated Chrysotile Using Phase-Contrast Microscope

Abstract

According to XED analysis, the chrysotile changed to an amorphous phase after heating at 600°C for 3 h. With heating at temperatures exceeding 700°C, chrysotile changed to forsterite. After heating at 1000°C for 3 h, observation by phase-contrast microscopy revealed that only a very small number of chrysotile particles remained in the sample. In contrast, treating of the JIS A 1481: 2006 sample under the same conditions (1000°C, 3 h) resulted in the complete disappearance of chrysotile particles.