초록 ▼

Low thermal expansion ceramics of essentially 100 percent cordierite solid solution are prepared by the devitrification of a glass frit compact having the nominal composition in weight percent 16 percent MgO, 30 percent Al2O3, 54 percent SiO2. These ceramics exhibit adequate density and strength and

Low thermal expansion ceramics of essentially 100 percent cordierite solid solution are prepared by the devitrification of a glass frit compact having the nominal composition in weight percent 16 percent MgO, 30 percent Al2O3, 54 percent SiO2. These ceramics exhibit adequate density and strength and are useful for example in the fabrication of gas turbine engine components such as rotor vanes and heat exchangers.

대표청구항

A ceramic body characterized by consisting essentially of cordierite solid solution of from 14 to 18 weight percent MgO, 28 to 32 weight percent Al2O3, and 52 to 56 weight percent SiO2, and having a linear thermal expansion of less than 900 ppm over the temperature range 25°C to 800°C.

A ceramic body characterized by consisting essentially of cordierite solid solution of from 14 to 18 weight percent MgO, 28 to 32 weight percent Al2O3, and 52 to 56 weight percent SiO2, and having a linear thermal expansion of less than 900 ppm over the temperature range 25°C to 800°C.