Abstract: ZnAPO-34 films on dense alumina plates were synthesized by the vapor-phase transport(VPT) method. XRD and SEM were used to examine the powders and films. The water content in the synthesis had a strong influence on the crystal sizes and the morphology of ZnAPO-34 powders and films, and played a critical role on the successful preparation of a uniform ZnAPO-34 film. The optimum VPT synthesis was conducted at 170 ℃ for 24 h with the gel prepared as a composition of n(P₂O₅);n(Al₂O₃);n(ZnO);n(H₂O)=1;0.8;0.4 ;150 and the liquid phase composed of triethylamine and water [n(triethylamine);n(H₂O)=1;75]. Repeated synthesis cycles were necessary to obtain a continuous and uniform ZnAPO-34 film.

Key words: Molecular sieve film, Vapor-phase transport method, ZnAPO-34 film