Aluminum oxide platelets

Figure 5. Oxide platelets viewed by electron silhouette on aluminum after corrosion for 30 hours in steam at 5 °C (4)...

Clays are abundant throughout the world approximately 4250 distinct clay minerals have been identified (98), of both natural and synthetic origin. Clays are phyllosiUcate minerals, so-caUed because of their sheet-like (1 20 thicknessilength) structure (99). The sheets (phyllo) consist of aluminosilicate networks composed of silicon oxide tetrahedra (Si04) or aluminum oxide octahedra (AlOg). These sheets form layers (platelets) when oxygen atoms are shared between two or more adjacent sheets, and can combine in various ways to form many different types of clays. 

Temperature of cooler/furnace -20 °C max. 430 °C Platelet No. 3 material width length Aluminum, anodically oxidized 9.0 mm 9.0 mm... 

Platelet No. 1 material Aluminum, anodically oxidized Cooling channel No. 4 diameter length 300 pm 6.5 mm... 

A convenient method to produce porous surfaces is the anodic oxidation of aluminum plates. Such microstructured aluminum platelets have been coated by wet impregnation with Pt-, V- and Zr-precursors [35], and tested under catalytic methane combustion conditions. The conversion rate of oxygen followed directly the platinum content in the catalysts. These data were well reproducible even after five different runs. 

In the case of catalytic methane combustion, aluminum was chosen as an appropriate material for the catalyst wafers since anodic oxidation of aluminum can be used to obtain porous surfaces. Such micro structured aluminum platelets were coated by wet impregnation with Pt, V and Zr precursors [50],... 

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