Loading of KF on zeolite NaY leads to a similar basicity to that of KOH/NaY, but no strongly basic sites formed on the composite due to the negative effect of SiO4 tetrahedra in NaY which form species with low base strength. Using ALPO(4)-5 or NaY coated with Al2O3 to support KF could avoid the effect of SiO4 tetrahedra and increased the base strength of the sample. KNO3 loaded on NaY created basic sites after decomposition at 673 K with a redox method, and KNO3/KL was found to have superbasicity. For preparation of strongly basic zeolites, microwave irradiation was employed to disperse MgO on zeolites, and the resulting materials showed high activities in the decomposition of isopropanol or the isomerization of cis-but-2-ene at 273 K.