Contact Supplier Download PDF - Springer Ultrafine and nanosized powders of oxidizers and metals are considered as promising ingredients fortrafine ammonium perchlorate AP powder and nanosized aluminum were produced by mechanicalder and ultrafine ammonium perchlorate p.
Show full item record Abstract Composite solid propellants are typically used in rocket propulsion systems due to their simplicity and relatively low cost.
They are mixtures of the fuel, oxidizer, and various catalysts. Oftentimes, bonding agents and plasticizers are added to improve the mixture and propellant qualities.
The advent of the nano-particle synthesis revolution allows for customized particle synthesis. This study first presents new insight and possible advantages unique only to closed-bomb strand burners for the testing of composite solid propellants.
However, little information on the combustion efficiency has been reported with strand burner testing. The advantages of a closed-bomb burner is revealed in the present work for the first time by relating the observed pressure rise to a quantitative measure of combustion efficiency through the use of temperature change approximations.
The pressure rise is an indication of the flame temperature from the propellant combustion products that mix with the inert gas argon in the chamber.
The pressure rise study concluded with comparing combustion efficiencies of the synthesis methods of metal oxide catalysts in both aluminized and non-aluminized AP and hydroxyl—terminated polybutadiene HTPB propellants.
Plotting a normalized pressure rise compared and the mean test pressure indicated that the propellants with narrow AP particle size distributions burn more efficiently. Using simplified models, changes in flame temperature were calculated, and corresponding changes in the relative combustion efficiency were found.
The second focus is on developing a method to evaluate the ignition delay times of similar propellant formulations. Ignition delay time measurements on solid energetic materials lead to better fundamental understanding of the ignition process and provide benchmark data for improving models of the ignition process.
A CO2 laser with a wavelength of The ignition delay time results were compared to literature values for similar conditions.
Additional studies to examine the effects of in-situ titania nanoparticles on the ignition delay times demonstrated that the nano-additives only appeared to alter the ignition behavior of the aluminized APCP.
From the results of these ignition experiments, it can be concluded that additives, which aid in the low-temperature decomposition of AP, such as Fe2O3, are believed to impact the ignition delay times the most URI.Spectroscopic Investigation on Sol Gel Derived TiO 2 Nanoparticles.
Praveen Kumar Singh. 1*, Soumya Mukherjee. 2 SEM analysis showed that the prepared nanoparticles were in the nano regime, nearly spherical and Titania nanoparticles have important applications in the field of optical devices, sensor and. The advent of the nano-particle synthesis revolution allows for customized particle synthesis.
Baseline propellants of diverse ammonium perchlorate (AP) particle size distributions were tested at 80% AP and 20% HTPB by weight. it can be concluded that additives, which aid in the low-temperature decomposition of AP, such as Fe2O3, are.
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Home; Photodegradation of dye pollutant under UV light by nano-catalyst doped titania thin films. Appl. Catal. Selective preparation of nanorods and micro-octahedrons of Fe 2 O 3 and their catalytic performances for thermal decomposition of ammonium perchlorate.
Powder . Preparation of TiO 2 Nanorod Arrays by Electrophoretic Deposition of Titania Nanoparticles "Synthesis and Characterization of Co Nanoparticles by Solventless Thermal Decomposition", Solid State Phenomena, Vol. , pp. , infrared curve and the catalytic performance for the ammonium perchlorate (AP) decomposition .
Other oxidizers and binders in place of AP (ammonium perchlorate) and HTPB (Hydroxyl-terminated Polybutadiene) can be used as the baseline composite propellant.
外部発表論文リスト 外部発表履歴クエリ 安部 力 Abe, Chikara Abe, C., Tsuru, Y., Iwata, C., Ogihara, R. and Morita, H. Intravenous Infusion of Hyperosmotic NaCl Solution Induces Acute Cor Pulmonale in Anesthetized Rats.