Suan prakop thang khemi khong din khao lae din dam bang tuayang.
1985
Prasak Thavornyutikarn | Kanika Taechasakunmas
The chemical composition of some selected samples of kaolin and ball clay were determined by gravimetry. It was found that the composition of three sources of lampang kaolin were 64-71% SiO2, 1.6-1.9%Fe2Oe, 0.03-0.04%TiO2, 17-29%al2O3, 0.28-0.61% CaO, 0.19-0.25% MgO, 0.10-0.42% Na2 and 0.52-0.99% K2O. Ball clay of Mae Rim, Chiang Mai, contained 54% SiO2, 3.1% Fe2O3, 0.72% TiO2, 33% Al2O3, 0.38%CaO, 0.25%mgO, 0.16%Na2O and 055%K2O.
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