Norris powder

Norris Powder. A low-freezing mining expl invented in 1901 by an American, Norris. It was much less sensitive to impact and friction than contemporary Dynamites. It contained NG 70, mononitrobenzene 15, and Huile empyroma-tique 15%. The latter ingredient consisted of ail oily substance obtained on distn of wood tar. 

Norris and Klemka employed the 1 1 double salt prepared by heating 30 g. of NaCl and 68 g. of AICI3 at 230-250° for 1 hr., pouring the melt into a beaker, and stirring to a meal as it solidified. The reagent was kept in a well-stoppered bottle and powdered before use. An aliphatic or aromatic amide in a distilling flask was heated AICI3,... 

Kellex succeeded in devising a promising new barrier material in the autumn of 1943 that combined the best features of the Norris-Adler barrier and the compressed nickel-powder barrier. The problem then was what to do about the Houdaille-Hershey plant under construction in Decatur, which was designed to produce Norris-Adler. Should it be stripped and reequipped to manufacture the new barrier at the price of some delay in starting up K-25 Or should the several barrier-development teams make a final concerted effort to improve Norris-Adler to production quality Over these significant questions Groves and Harold Urey violently clashed. 

A recent standard that gives excellent agreement with the powdered oxide peak values in a stable, diffuse matrix has been developed by M. Trygstad and K. Norris of NIRSystems (personal communication), working with Ricker and Springsteen of Labsphere. The material combines the three rare earth oxides in high concentration with a fluorocarbon resin. The admixture is then subjected to extremely high pressure but at low temperature. Peak values of the rare earth oxides coincide very well with the NIST standard (Fig. 12). 

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