... also prolong the service life of oil and gas wells Engineered proppants are made of ceramic, usually derived from bauxite, and ... , 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 ...