摘要:
A crystalline, substantially non-solvated aluminum hydride having a surface coating of an organic compound containing at least one phenyl group or a condensed ring structure and ordinarily containing an unsaturated linkage. This composition exhibits an increased thermal stability over that shown by the uncoated aluminum hydride.
摘要:
AN IMPROVEMENT IS A PROCESS FOR PREPARING LARGE CRYSTALS OF SUBSTANTIALLY NON-ETHER SOLVATED, CRYSTALLINE ALUMINUM HYDRIDE BY HEATING AN ALUMINUM HYDRIDE SOURCE MATERIAL IN AN ETHER CONTAINING SOLUTION. THE PRESENT IMPROVEMENT COMPRISES EMPOLYING A SLURRY OF ALUMINUM HYDRIDE N-PROPYL ETHERATE AS THE ALUMINUM SOURCE MATERIAL THEREBY PROVIDING THE UNEXPECTED ADVANTAGES OF NOT HAVING TO DISTILL ETHER FROM THE REACTION MASS OR TO MAINTAINED AN ELEVATED PRESSURE ON ON THE SYSTWM AS REQUIRED IN THE PROCESS AS PRACTICED HERETOFORE.
摘要:
1. In a rocket propellant composition which burns to produce propulsive gases and which consists essentially of a finelydivided, solid, inorganic oxidizer containing combined oxygen which it yields readily for combustion of the fuel components of said composition, and a finely-divided beryllium-containing fuel selected from the group consisting of beryllium, beryllium hydride and mixtures thereof dispersed in an organic fuel matrix comprising at least about 20 per cent by volume of said composition, the improvement in which the oxidizer, the beryllium-containing fuel, and the organic fuel matrix are present in amounts such that the oxidation ratio as defined by the following expression:
摘要:
1. A MERCURY-CONTAINING ALUMINUM HYDRIDE COMPOSITION COMPRISING ALUMINUM HYDRIDE AND FROM ABOUT 0.0005 TO ABOUT 2.5 PERCENT BY WEIGHT BASED ON THE ALUMINUM HYDRIDE OF MERCURY. 7. THE PROCESS FOR THE PREPARATION OF A MERCURY-CONTANING ALUMINUM HYDRIDE COMPOSITION WHICH COMPRISES CONTACTING ALUMINUM HYDRIDE COMPOSITION WHICH COMPRISES DUCED PRESSURE IN A CLOSED SYSTEM FOR A PERIOD OF FROM ABOUT 0.5 TO ABOUT 35.0 HOURS AT A TEMPERATURE OF FROM ABOUT 40*C. TO ABOUT 150*C. AND A RECOVERING THE RESULTING MERCURY-CONTAINING ALUMINUM HYDRIDE COMPOSITION. THE QUANTITY OF MERCURY EMPLOYED BEING FROM ABOUT 0.001 TO ABOUT 50 MOLES PER MOLE OF ALUMINUM HYDRIDE.
摘要:
AN ALKYLAUMINUM-BASED MATERIAL SUITABLE FOR TRACER APPLICATIONS HAVING A LOWER ALKYLUMINUM COMPOUND SUCH AS TRIETHYLALUMINUM OR MIXTURE THEREOF, AN INORGANIC OXIDIZER, AND OPTIONALLY A FINELY DIVIDED METAL OR METAL HYDRIDE.
摘要:
1. A SOLID UNITARY COMPOSITE PROPELLANT GRAIN COMPRISING, IN ADMIXTURE: (1) PASSIVATED LITHIUM METAL WHICH INCREASES IN WEIGHT NO MORE THAN 10 PERCENT FROM THE DRY STATE OVER 12 HOURS IN CONTACT WITH AN ENVIROMENT OF 50 PERCENT RELATIVE HUMIDITY AND 25* C., SAID PASSIVATION BEING ACCOMPLISHED BY A COATING ON LITHIUM WHICH IS CHEMICALLY INSERT TOWARD AND INSOLUBLE IN THE CONSTITUENTS OF THE GRAIN, (2) A LOW-VOLATILITY FLUORINE OXIDIZING AGENT (A) CONTAINING MORE THAN ABOUT 50 PERCENT BY WEIGHT OF FLUORINE WHICH IS BONDED TO CARBON AND NITROGEN ATOMS AND (B) HAVING A HEAT OF REACTION WITH LITHIUM OF NOT LESS THAN ABOUT 100 KILOCALORIES PER GRAM EQUIVALENT OF THE FLUORINE THEREIN, AND (3) A SOLID POLYMERIC BINDER (A) WHICH HAS A MOLECULAR WEIGHT OF NOT LESS THAN ABOUT 10,000 (B) WHICH CONTAINS NO ACTIVE HYDROGEN AND (C) IN WHICH AT LEAST ABOUT 50 PERCENT OF THE ATOMS IN TH BACKBONE ARE CARBON ATOMS, THE OVERALL WEIGHT RATIO OF LITHIUM TO FLUORINE IN THE PROPELLANT GRAIN BEING NOT LESS THAN ABOUT 7:19.