Society of Glass Technology · [Sheffield] · leaf 90
soda boundwith gelatin and burned at 700°, 1150°, or cone 10 (1300°) showeda marked discontinuity at 200—250°, probably due to the formationof cristobalite. These results give no positive support to the theory that kaolindissociates on heating with the separation of silica, and in anycase they seem… … S Id 7 EH-PANSl ON Fig. 12. PC about 4 per cent, of soda) intimately mixed, the ratio between theweight of kaolin and the weight of precipitated silica present beingthe ratio of their molecular weights. The expansion of thesespecimens (see Fig. 12), whether fired to cone 06 or to cone 9 ina works…
Glass
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