Refractory powder

P-Ghloroalkoxy Titanates. The reaction of TiCl with epoxides, such as ethylene or propylene oxide (qv), gives P-chloroalkyl titanates (8,9). One example is Ti(OCH2CH2Cl)4 [19600-95-5]. The P-chloroalkoxy titanates can be used to biad refractory powders and ia admixture with diethanolamine to impart thixotropy to emulsion paints (10). 

See entries dust explosion incidents, refractory powders See other metal non-metallides... 

See entry DUST EXPLOSION INCIDENTS, REFRACTORY POWDERS See other METAL NON-METALLIDES... 

Radical initiators, 357 Raney alloys, 358 Reaction safety calorimetry, 358 Reaction simulation, 359 Reactive metals, 359 Redox compounds, 359 Redox reactions, 360 Reducants, 362 Refractory powders, 363 Refrigerators, 363 Repair and maintenance, 364 Rocket propellants, 364 Rosin, 365... 

By injection of refractory powders into RF discharges, it is possible to heat treat the particles. Decomposition, vaporization, melting, or surface modification of particles can be achieved in varying degrees depending on the physical properties of the material, particle residence time, particle surface area, and the enthalpy available in the plasma. 

Slurry of colloidal silica and refractory powder (silica, alumina zircon, etc.) is prepared. Slurries typically have the consistency of a thin pancake or crepe batter. 

These three conditions and the typical form of the strength curve are illustrated in Figure 12.42-Figure 12.47. Sears first quantified this relationship [6]. His definition of the optimum colloidal silica content was based on knowing the surface area of both the binder colloidal silica and the refractory powders being used. While colloidal... 

The liquid ceramic slurry consists of a binder and a very fine refractory powder, reduced to slime by permanent mixing. The binder may be colloidal silica, hydrolysed ethyl silicate or hydrolysed sodium silicate, the choice of the technology applied being determined by technical reasons. When using ethyl silicate, drying is faster, which allows a higher cycle rate, but ethyl alcohol vapours are emitted. These vapours, if present in too large an amount, have to be collected and treated before emission. 

The experiments have shown that the introduction of an additional element, such as azide of metal of the same kind, into hahde of element to be nitrided can create more favorable conditions for obtaining final refractory powders with even higher quality. The chemical reaction equations in stoichiometric form look as follows ... 

---