Powders, description

Although two-dimensional features are readily apparent in the shocked and preserved samples, and study of the loading conditions indicates the need for two-dimensional studies, the influence of various powder descriptions and time scales of the events can be studied more efficiently in one-dimensional... 

Powder description Gas RPM Speed (%) Ball to powder weight ratio No. of balls WD (mm) Mode Milling Time (h)... 

This description is traditional, and some further comment is in order. The flat region of the type I isotherm has never been observed up to pressures approaching this type typically is observed in chemisorption, at pressures far below P. Types II and III approach the line asymptotically experimentally, such behavior is observed for adsorption on powdered samples, and the approach toward infinite film thickness is actually due to interparticle condensation [36] (see Section X-6B), although such behavior is expected even for adsorption on a flat surface if bulk liquid adsorbate wets the adsorbent. Types FV and V specifically refer to porous solids. There is a need to recognize at least the two additional isotherm types shown in Fig. XVII-8. These are two simple types possible for adsorption on a flat surface for the case where bulk liquid adsorbate rests on the adsorbent with a finite contact angle [37, 38]. 

Methima ole. This compound is a white to pale buff crystalline powder with a faint characteristic odor. It is soluble in water, ethanol, and chloroform (1 g/5 mL) and only slightly soluble in other organic solvents. A detailed chemical, analytical, spectral, and chromatographic description is available (44). It is assayed titrimetrically with NaOH (54). 

Description of class Wet feed is granular and damp but not sticky or muddy and dries to granular meal Wet feed is pasty, muddy, or sloppy product is mostly hard pellets Wet feed is crumbly and friable product is powder with very few lumps... 

GENERALIZED DESCRIPTION OF POWDER AND POWDER SLURRY-LIKE MATERIALS IN X-RAY FLUORESCENCE SPECTROMETRY... 

In most cases of interest, shock-induced chemical reactions in solids are studied in mixtures of powders of the potential reactants. In the earlier description of conceptual models it was emphasized that the pores provide space in which the potential reactants can be more intimately mixed in order... 

It should be observed that every element except the powder system in the recovery system is chosen for favorable shock properties which can be confidently simulated numerically. The precise sample assembly procedures assure that the conditions calculated in the numerical simulations are actually achieved in the experiments. The influence of various powder compacts in influencing the shock pressure and mean-bulk temperature must be determined in computer experiments in which various material descriptions are used. Fortunately, the large porosity (densities from 35% to 75% of solid density) leads to a great simplification in that the various porous samples respond in the same manner due to the radial loading introduced from the porous inclusion in the copper capsule. 

Kaye, B.H., 1986. The description of two-dimensional rugged boundaries in fine particle science by means of fractal dimensions. Powder Technology, 46, 245-254. 

Suzuki, M. 1997. Description of particle assemblies. In Powder technology hancllrook. Eds. K. Gotoli, El. Masuda and K. Higaslianti, 2nd edition. New York Marcel Dekker. 

Description A slurry of polypropylene powder in hexane/propylene liquid... 

Taxonomy No. 4,2.3.3 Equipment Description PROTECTION SYSTEMS-FIRE- RRE SUPPRESSION -DRY POWDER ... 

The major consumer of tantalum is the capacitor production industry. About 60% of the total amount of tantalum currently produced is in the form of fine, agglomerated high purity powder of capacitor grade. Tantalum capacitors have high volumetric efficiency and reliability. A basic description of tantalum capacitor technology is presented in overview [19]. 

French et al, Descriptions And Requirements For Explosive, Nylon Plastic-Bonded Molding Powder PBXN-1 , NAVORD Syst Command, OS11632A (1968) 51) EE. Kilmer, Heat... 

Description White powder or crystals. Sodium benzoate converts to benzoic acid in acidic mixtures. Benzoic acid has good antimicrobial features but does not dissolve well in water, whereas sodium benzoate dissolves very well in water. ... 

At the outset it is useful to consider some common examples of problems encountered in industrial mixing operations, since this will not only reveal the ubiquitous nature of the process, but will also provide an appreciation of some of the associated difficulties. Several attempts have been made to classify mixing problems and, for example, REAVELL(1) used as a criterion for mixing of powders, the flowability of the final product. HARNBY et at.(2) base their classification on the phases present that is liquid-liquid, liquid-solid and so on. This is probably the most useful description of mixing as it allows the adoption of a unified approach to the problems encountered in a range of industries. This approach is now followed here. 

Some of the common terms used for defining or describing particle shapes in a qualitative way are presented in Table 2.1. It is by now quite clear that particle shape cannot be very precisely defined. However, it is fortunate that mineral particles occur in a variety of generally simple shapes some are acicular, several are plate-like, most are convex, others are mildly concave, and in this manner a phraseological descriptive list is built for the different shapes that are formed or produced or generally encountered of powders of fragments of... 

Austin, L. G., A review introduction to the mathematical description of grinding as a rate process. Powder Technol. 5, 1-17 (1971). 

Many methods have been proposed and are used to study the thermal stability of propellants and to ensure the absence of possible autocatalysed decompositions during storage. None are sufficiently reliable to merit individual description. In practice, stabilisers are added, the usual being diphenylamine for nitrocellulose powders and symmetrical diethyl diphenyl urea (carbamate or centralite) for double base propellants. Provided a reasonable proportion of stabiliser remains, the propellant can be assumed to be free from the possibility of autocatalytic decomposition. The best test of stability is therefore a chemical determination of the stabiliser present. 

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