Fig. 1. Picture of coating mechanism of finished fine pumice powders; (a): coating 10% alkylsilan, (b) coating 10% natural oil.
Fig. 2. Pictures of pumice stone and fine powder; (a): pumice stones, (b) micronized fine pumice powder
Fig. 3. The pictures of SEM analysis of micronized pumice powder compared before treatment with after treatment using alkyl silan. (A) and (B): before treated, magnification x 300 times, SEM and magnification x 3000 times, SEM, (C) and (D): magnification x 300 times, SEM and magnification x 300 times, SEM)
Fig. 4. The picture of TEM analysis of micronized pumice powder without any treatment. (A) observed with TEM analysis, (B) measured diffraction pattern of pumice powder.
Fig. 5. The picture of particle size of micronized pumice powder measured by Zeta-sizer. (A) origin pumice powder, (B) coated alkylsilan pumice powder, (C) coated natural oil.
Fig. 6. The graph of Ramann analysis coated micronized pumice powder. (a) origin pumice powder, (b) coated alkylsilan pumice powder, (c) coated natural oil.
Table 1. Analytical Result of Pumice Powder Refined as Micronized Size Improvement
Table 1. Determination of Heavy Metal Analysis in Micronized Pumice Powder
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