Society of Glass Technology · [Sheffield] · leaf 142
ity per 1 per cent.CaO added, and the corresponding 1 per cent, decrease in Na20,has a mean value (1 per cent. CaO —1 per cent. Na20) = 00056.The corresponding value for the K20 glasses is 1 per cent. CaO —1 per cent. K20 = 0-0077. Thus, the addition of 1 per cent. CaOin this type of glass has a… … 5 10 15 Percentage CaO. Fig. 2. R20 Constant 10 15 20 Percentage CaO.Fig. 3. in CaO, the Si02 being constant for the Na20, the K20, and themixed oxides series. From this diagram, the density of the glass70SiO2,30Na2O is found to be 2467, of the glass 70SiO2,15Na2O,15K2O 2-450, and of the glass…
Glass
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