Aluminum Interdependencies

Multilayered materials owe their properties and behavior to the properties of and the interactions between the components (5). Each of the two or more components contributes its particular property to the total performance of the multilayered material. For example, in Pouch 1, Table II, the aluminum foil provides high oxygen and water vapor permeability resistance, poly (ethylene terephthalate) provides structural strength and stiffness, and the ethylene-butene copolymer provides a heat sealable layer. If the components of the multilayered materials interact then the whole would be something different than the sum of its parts. In other words, the properties of the components of the multilayered materials are not independent of one another but rather are interdependent. 

The explanation of the procedure for the measurement of the lattice parameters by x-ray diffraction is given in Chapter 4. In Table 3.6, the Si/Al relation, determined with the assistance of the interdependence between the unit cell parameter and the aluminum contents in the zeolite framework for faujasite, that is, using the so-called Breck-Flanigen relationship, is reported [52]... 

L ess than 20 years after the isolation of sodium metal by Sir Humphrey Davy, Oersted discovered the first practical use for the metal — reducing aluminum chloride to produce aluminum. Initially, the aluminum and sodium industries were so completely interdependent as to be considered as one. When Charles Hall revolutionized the aluminum industry with his historic work on electrolysis, sodium was relegated to a minor role in the field of metal production and large scale usage was confined to other areas. Research on sodium reduction of metal halides has continued through the years, however, and recent commercial developments attest to the success of this work. 

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