The coating of stainless steel with zeolite Y was achieved. Zeolite Y crystals were shown to grow directly on the support provided the synthesis mixture was previously seeded. A stable, supported crystalline monolayer can then be synthesized with crystals as small as 0.2 μm. Using an unseeded synthesis mixture results in poor coverage and very low stability of the Y coating or in a stable coating of a side species, namely gmelinite. The stability of the zeolite Y coating on stainless steel is explained by the crystal growth in the nearest vicinity of the support. Partly uncompleted crystals are synthesized in this process and stabilized through chemical bonding with the support. The bonding with the support and thus the coverage are improved by an oxidic layer on the surface which can be formed upon calcination at high temperature.
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Clet et al. (1999) studied this question.
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