| 초록 |
The role of MCM-22 (P) as an intermediate phase in zeolite syntheses using N,N,N,N’,N’,N’-hexamethyl-1,5-pentanediammonium as an organic SDA has been studied. In the presence of Na+ ions the obtained MCM-22 (P) zeolite was found to transform into the denser EU-1 (EUO) structure with prolonged time in the crystallization medium. However, when K+ ions were instead of Na+ ions, no significant phase transformation was detected during 4 weeks of crystallization. The powder materials are characterized by using X-ray diffraction, scanning electron microscopy and solid state NMR. |
