Solid-liquid equilibrium, ternary materials

Solid-Liquid Equilibrium in Ternary Group III-V Semiconductor Materials... 

The ternary systems of these kinds of metals with boron reveal a more complex structure because of the presence of many other ternary phases denoted to as tp-and co-phases. The stoichiometries of these solid solutions thereof. Other ternary phases have the composition and M M B2,v, e.g., TaNiB2, Mo2peB4, and MosCoB. As an example, an isothermal section of the B-Co-Mo system is shown in Fig. 27 in which both the x- and the (p-phases are linked with Co as the binder [128], However, in systems with Fe replacing Co, a <,c-phase does not exist. Hence co is in equilibrium with liquid metal and is thus likely to form a cermet material with Fe like the x-phase Mo2Fei3Bs (Fig. 28). Phase compositions located in the pseudo-binary equilibria with a metal can easily be pressureless liquid phase sintered at temperatures between 1500°C and 1700°C. Wear-resistant parts have been developed from Mo2FeB2-Fe cermets with Ni or Cr additives [129-131, 307]. Figure 29 presents an isothermal section of the Ni-Ta-B system at 950°C [126] with three ternary phases where only X is in equilibrium with metallic Ni. 

A ternary liquid-liquid system for partition chromatography is prepared from a mixture of 2,2,4-trimethylpentane, ethanol and water (34 5 1). The less polar upper layer is used as the stationary phase. A diatomaceous material, Hyflow Super Cel (particle size, 7-11 jam), is used as the solid support. The columns (40 cm X 4 mm I.D.) are packed by the slurry technique, and the support material is coated in situ with the liquid stationary phase as described earlier [54]. A pre-column is inserted in order to maintain equilibrium between... 

Chromatography is a separation technique where component molecules (solutes) in a sample mixture are transported by a mobile phase over a stationary phase. The mobile phase may be a gas or a liquid (solvent system) and the stationary phase may be a liquid film on the surface of an inert support material or a solid surface. The solute, mobile phase and stationary phase form a ternary system. Interaction occurs between the solute and stationary phase so that the solute is distributed between the stationary phase and mobile phase. Attraction of the solute for the stationary phase results in retardation of its movement through the chromatography system. Different components (solutes) will move at differing rates since each will have a slightly different affinity for the stationary phase with respect to the mobile phase. Each component or solute A,B,C) is distributed between the two phases with an equilibrium established defined by the distribution ratio (previously known as the partition ratio) thus for component A... 

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