Question

15-48 What is the lowest temperature at which a mixture of SiO$_2$-Al$_3$O$_3$ could still be completely liquid? (See Figure 15-24.) 2200 2000 Mullite 1800 Mullite + L Al$_2$O$_3$ + 1600 SiO$_2$ + Mullite 1400 SiO$_2$ 20 40 60 80 Al$_2$O$_3$ Weight percent Al$_2$O$_3$ Figure 15-24 A simplified SiO$_2$-Al$_2$O$_3$ phase diagram, the basis for alumina silicate refractories. (For Problem 15-48.)

          15-48 What is the lowest temperature at which
a mixture of SiO$_2$-Al$_3$O$_3$ could still be
completely liquid? (See Figure 15-24.)
2200
2000
Mullite
1800
Mullite + L
Al$_2$O$_3$
+
1600
SiO$_2$ + Mullite
1400
SiO$_2$
20
40
60
80
Al$_2$O$_3$
Weight percent Al$_2$O$_3$
Figure 15-24 A simplified SiO$_2$-Al$_2$O$_3$ phase
diagram, the basis for alumina silicate refractories.
(For Problem 15-48.)

$15-48 What is the lowest temperature at which a mixture of SiO2-Al3O3 could still be completely liquid? (See Figure 15-24.) 2200 2000 Mullite 1800 Mullite + L Al2O3 + 1600 SiO2 + Mullite 1400 SiO2 20 40 60 80 Al2O3 Weight percent Al2O3 Figure 15-24 A simplified SiO2-Al2O3 phase diagram, the basis for alumina silicate refractories. (For Problem 15-48.)$

Added by Christina C.

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