By Ulrich Teipel
Incorporation of specific elements with really good houses permits one to tailor the tip product's houses. for example, the sensitivity, burning habit, thermal or mechanical homes or balance of vigorous fabrics should be affected or even controllably diverse via incorporation of such elements. This ebook examines particle applied sciences as utilized to lively fabrics akin to propellants and explosives, hence filling a void within the literature in this subject.
Following an advent protecting common beneficial properties of lively fabrics, the 1st part of this booklet describes equipment of producing particulate full of life fabrics, together with dimension relief, crystallization, atomization, particle formation utilizing supercritical fluids and microencapsulation, agglomeration phenomena, certain issues in blending explosive debris and the creation of nanoparticles. the second one part discusses the characterization of particulate fabrics. thoughts and techniques resembling particle measurement research, morphology elucidation and the decision of chemical and thermal houses are offered. The wettability of powders and rheological habit of suspensions and solids also are thought of. additionally, tools of making a choice on the functionality of specific lively fabrics are described.
every one bankruptcy offers with basics and alertness chances of many of the equipment awarded, with specific emphasis on concerns appropriate to particulate lively fabrics. The booklet is therefore both proper for chemists, physicists, fabric scientists, chemical and mechanical engineers and somebody or engaged in particle processing and characterization technologies.
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Additional resources for Energetic materials : particle processing and characterization
The principle that the ratio of the total fracture area to the fracture energy is constant corresponds to the area-specific size reduction energy remaining constant. This holds true only for size reduction methods in which the loads are imposed on the smallest possible spaces, such as gaps. In practice, the required energy is 200 –3000 times greater than this area-specific size reduction energy. 1]. 1]. However, his equation also appears unrealistic for a wide range of practical problems, because it predicts that the energy required to grind 10-mm particles down to 1 mm would be the same as that required to grind 100-cm particles down to 10 cm.
This indicates the enormous energy increases potentially available through the use of such formulations. In addition to GAP, there are a number of other energetic binder candidates which, combined with other new energetic materials, have excellent potential for development as future high-energy propellant powders. However, as is the case for solid rocket propellants, the burn rate behavior of such formulations is very difficult to predict and must be determined experimentally through further research and development.
The final particle size is determined by the pin design, the number of rows of pins, the rotation rate and the product throughput. Rotor diameters range from 100 to 900 mm and the perpendicular velocity from 60 to 200 m/s. 6], and also energetic materials. A pinned disk mill built by Hosokawa Alpine, Type Kolloplex 160 Z, was used to grind various relatively insensitive energetic materials. This mill has variable rotation rates between 9000 and 14 000 min–1. 3 shows typical results for comminution of ammonium perchlorate at two rotation rates (9000 and 12 000 min–1); the dispersion coefficient j describes the particle size distribution (see Chapter 8).
Energetic materials : particle processing and characterization by Ulrich Teipel