Synthesis of alumina-pillared fluorine micas using poly(vinyl alcohol) as a template agent and properties of their sintered bodies

Abstract

Alumina-pillared fluorine micas were synthesized from Na-tetrasilicic mica and polyhydroxoaluminum solution in the presence of poly(vinyl alcohol) (PVA) having different molecular weights. The pillared mica having a longer basal spacing and a larger pore volume was formed when PVA with larger molecular weight was used. However, the cation exchange capacity of the pillared mica decreased in the case of using PVA with larger molecular weight. Properties of sintered bodies of the pillared micas were also studied.