. High fire porcelain glazes. . FLINT PORCCLAJW GLAZES - DEFORMATION TEMPERATURES *C CLAY Fig. 2.—Deformation temperatures The deformation eutectic axis lies at a slight inclination to theordinate. As the silica content approaches 7 equivalents thisinclination rises, and at 11 equivalents it increases much more. Examination of Fig. 2 shows that increasing flint does notgreatly increase the deformation temperature until the composi-tion approaches 60 per cent flint. * Further increase in flint in-creases the temperature rapidly. Starting with zero clay, additions of clay first lower the defor-m
. High fire porcelain glazes. . FLINT PORCCLAJW GLAZES - DEFORMATION TEMPERATURES *C CLAY Fig. 2.—Deformation temperatures The deformation eutectic axis lies at a slight inclination to theordinate. As the silica content approaches 7 equivalents thisinclination rises, and at 11 equivalents it increases much more. Examination of Fig. 2 shows that increasing flint does notgreatly increase the deformation temperature until the composi-tion approaches 60 per cent flint. * Further increase in flint in-creases the temperature rapidly. Starting with zero clay, additions of clay first lower the defor-mation temperature, after which further increments of clayincrease the temperature gradually until 45 per cent clay is ap- Bureau of Standards Technologic Paper No. 196. Fig. 3.—Solid diagram of deformation temperatures Bureau of Standards Technologic Paper No. 196
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