Uniform Si‐CHA Zeolite Layers Formed by a Selective Sonication‐Assisted Deposition Method

Discrimination against the majority : The broad size distribution of conventional near‐cubic Si‐CHA (all‐silica chabazite) zeolites impedes the formation of a close‐packed layer, which is critical for the manufacture of zeolite films by secondary growth. Although present in lower abundance, platelike Si‐CHA particles cosynthesized with near‐cubic particles were deposited selectively on an α‐Al 2 O 3 disk to form a uniform layer.