... of oil and gas wells Engineered proppants are made of ceramic, usually derived from bauxite, and offer the advantages of ... milled, mixed powder, pellet and sintered at high temperature, our proppant has the features of high technology, stable quality, high temperature ... , Brazil, Russia and other countries. All specifications of our proppant completely Meet or exceed SY/T5108-2006, SY/T6302-1997and ...