Каталог стандартов
+7 (495) 223-46-76
+7 (812) 309-78-59
inform@normdocs.ru
1.1 This classification covers refractory products consisting predominantly of mullite (3 Al2O3[dot]2 SiO2) crystals that are formed by either converting any of the sillimanite group of minerals, or synthesizing from appropriate materials in a melt or sinter process.