Tubular shapes

Electrophoretic deposition (EPD) is anotlier metliod of casting slurries. EPD is accomplished tlirough tire controlled migration of charged particles under an applied electric field. During EPD, ceramic particles typically deposit on a mandrel to fonn coatings of limited tliickness, or tliin tubular shapes such as solid (3 " - AI2O2 electrolytes for sodium-sulfur batteries. 

Electrophoretic casting (38,59) is accompHshed by inducing controUed migration of charged particles under an appHed electric field to deposit on a mandrel. Thin tubular shapes and coatings of limited thickness are formed using this technique. Electrophoretic deposition (EPD) is also used to manufacture thin waU, soHd P -alumina [12005-16-2] NaAl Og, electrolytes for sodium—sulfur batteries. 

Most thermoplastics can be printed some thermosets. Handles flat, concave, or convex surfaces, including round or tubular shapes. 

Superior water conditioners. These are tubular-shaped devices that employ permanent magnets (no electrical connection). The devices are designed with a cobalt-content alloy core, arranged so that water flows around the magnetic core and perpendicular to the magnetic fields. 

Tubular shaped membrane in double pipe configuration... 

Figure 7.1. Typical membrane reactor configurations (a) reactor with plate-shaped membranes, (b) tubular-shaped membrane in double pipe configuration and (c) multichannel monolith.

Plug-flow tubular reactor (PFTR) This reactor is operated under steady-state condition. The reactor is of tubular shape, the reactants enter at the inlet and the composition is a function of the distance from the inlet. However, the composition is not a function of time. The ideal plug-flow reactor is characterized by the absence of mixing in the direction of flow and complete mixing in the transverse direction. 

Gas-liquid bubble column This reactor is of tubular shape (Figure 3.5). The liquid phase is agitated by the bubble rise of the gas phase. The gas phase flows through the reactor upward at a constant rate. The liquid phase is continuous. This reactor could be of continuous type, if the liquid is flowing through the reactor continuously or semibatch, if the liquid is stationary in the reactor. 

Fluidized-bed reactor (FLBR) The up-flow gas or liquid phase suspends the fine solid particles, which remain in the reactor (Figure 3.8). This reactor is of tubular shape with a relatively low aspect ratio of length to diameter. The most common application of FLBR is the classical FCC process. 

Two US military specifications currently exist for U alloys Uranium Alloy for Body Section Center of Ammunition Components , MIL-U-46126 (28 June 1968), and Uranium Alloy, Wrought, Bars, Billets and Tubular Shapes , MIL-U-46045C (24 June 1974)... 

Most of the cells of wood are long, narrow hollow fibers and tubular-shaped cells arranged with their long axes parallel to the axis of the tree trunk. Certain food storage cells lie in radial bands, termed wood rays, which are perpendicular to the tree axis. The walls of this complex system of plant cells form the basic framework and material of all wood substance, All wood substance is composed of two basic chemical materials, lignin, and a polysaccharidic system, which is termed holoceliulose. The latter embraces cellulose and the hemicelluloses, a mixture of pentosans, hexosans and polyuronides, and in some instances small amounts of pectic materials. Wood cell wall tissue also always retains small amounts of mineral matter (ash). 

A hydrometer is a hollow, tubular shaped vessel, provided at the bottom with a bulk contg some lead shot and at the top with a long thin tube contg a scale (See Fig). The scale may read... 

The M5-Destructor, used for destruction of control equipment of a glide torpedo, consier d of a tubular-shaped Tetrytol demolition block and a tail bomb fuze both mounted on a bracket (Ref 2, p 373 Ref 1, p 208). SeeFigonpD 5... 

Larger, nonspherical assemblies of carbon atoms have also been prepared, some with a tubular shape. These so-called nanotubes can be viewed as a rolled-up graphite sheet, perhaps capped with half of a buckyball in some cases. Nanotubes have many potential applications. They may be useful in constructing faster and smaller electronic devices because they can be doped to become semiconducting or metallic and they can be made to carry electrical current at higher densities than metals. They can also be spun into incredibly strong fibers. However, before they can reach their true potential, methods to produce them inexpensively must be developed. 

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