The weight fractions of the prepared PI composite samples were 10wt% SiO2, 7.5%wtSiO2-2.5wt% Al2O3, 5wt%SiO2-5wt%Al2O3, 2.5wt%SiO2-7.5wt% Al2O3, 10wt% Al2O3.
The weight scores of the PI composite samples prepared were 10wt% SiO2, 7.5% wtSiO2-2.5wt% Al2O3, 5wt% SiO2-5wt% Al2O3, 2.5wt% SiO2-7.5wt% Al2O3, 10wt% Al2O3.
The weight fractions of PI composites are 10wt% SiO2, 7.5% wtsio2-2.5wt% Al2O3, 5wt% sio2-5wt% Al2O3, 2.5wt% sio2-7.5wt% Al2O3 and 10wt% Al2O3, respectively.<br>