Temat: oxidizers - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Utleniacz – podstawowy składnik górniczych materiałów wybuchowych
Oxidizer – the basic ingredient of mining explosives
Autorzy:: Maranda, A.
Sitkiewicz-Wołodko, R.
Zrobok, R.
Florczak, B.
Bogusz, R.
Powiązania:: https://bibliotekanauki.pl/articles/165714.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:: utleniacze
górnicze materiały wybuchowe
oxidizers
mining explosives
Opis:: W artykule przedstawiono właściwości utleniaczy nieorganicznych (azotany(V), chlorany(V), chlorany (VII) i nadtlenek wodoru) stosowanych lub mogących znaleźć zastosowanie w górniczych środkach strzałowych. Zestawiono ich masy cząsteczkowe, gęstości, bilanse tlenowe, reakcje rozkładu, temperatury topnienia i rozkładu oraz rozpuszczalności w wodzie. Wyeksponowano ich wady i zalety, decydujące o zakresie wykorzystania w poszczególnych typach mieszanin wybuchowych.
This paper presents the characteristics of inorganic oxidizers (nitrate(V), chlorate(V), chlorate(VII) hydrogen dioxide) used or likely to be used in the mining blasting agents. Their molecular weights, densities, balances oxygen, decomposition reactions, temperatures of melting and decomposition and solubilities in water have been summarized. Their advantages and disadvantages, deciding on the use of particular types of explosive compositions have been exposed.
Źródło:: Przegląd Górniczy; 2017, 73, 3; 30-35
0033-216X
Pojawia się w:: Przegląd Górniczy
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Thermal Decomposition and Kinetics Studies of AN, KDN and Their Mixtures with and without Catalysts
Autorzy:: Kumar, P.
Joshi, P. C.
Kumar, R.
Powiązania:: https://bibliotekanauki.pl/articles/358729.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: green oxidizers
phase stabilization
thermal decomposition
thermo-kinetics
catalysts
Opis:: Potassium dinitramide (KDN) was incorporated in ammonium nitrate (AN) crystals in AN/KDN ratio of 90/10, 75/25 and 50/50 by a co-crystallization method. These mixtures were subjected to thermal decompositional studies (DSC-TG) using a Simultaneous Thermal Analyzer (STA). The catalysts used for the present studies were: i) cupric(II) oxide (CuO) and, ii) copper-cobalt based metal oxide (Cu-Co*). For all catalytic samples, 2% by weight percent of catalyst was added to the total weight of the samples. Thermal decomposition studies were carried out for all the oxidizer samples prepared. Thermal decompositional studies were carried out at three different heating rates, i.e. 3 K/min, 5 K/min and 10 K/min, and the kinetic parameters were computed using the model free Flynn-Wall-Ozawa equation. It has been observed that 50% KDN addition resulted in complete suppression of endothermicity indicating total supression of the phase changes of AN in this temperature range. Further, it was noticed that CuO acts as a better phase stabilizer for AN as compared to Cu-Co*. However, Cu-Co* considerably increased the net exothermic decompositional heat release (J/g) of AN.
Źródło:: Central European Journal of Energetic Materials; 2017, 14, 1; 184-200
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Effect of Some Inorganic Nitrate Salts on the Ignition Delay Time of DMAZ-IRFNA and DMAZ-WFNA Bi-propellants
Autorzy:: Pakdehi, S. G.
Shirzadi, B.
Powiązania:: https://bibliotekanauki.pl/articles/358187.pdf
Data publikacji:: 2018
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: DMAZ
liquid oxidizers
ignition delay time
inorganic nitrate salts
specific impulse
Opis:: Dimethylaminoethyl azide (DMAZ) is a good replacement for the hydrazine group in the space industry. However, it has a relatively long ignition delay time with the liquid oxidizer, white fuming nitric acid (WFNA), and is nonhypergolic with inhibited red fuming nitric acid (IRFNA). In this article, the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants were reduced by the addition of some inorganic nitrate salts, such as NH4NO3, KNO3, NaNO3, AgNO3 and LiNO3, to the liquid oxidizers. The results showed that WFNA containing 0.1 wt.%, 0.3 wt.% and 0.5 wt.% of LiNO3 reduced the ignition delay time of DMAZ-WFNA from 88 ms to 18 ms, 14 ms and 8 ms, respectively. The same percentages of LiNO3 caused the nonhypergolic DMAZ-IRFNA bi-propellant to have ignition delay times of 42 ms, 34 ms and 22 ms, respectively. Moreover, calculations indicated that the addition of LiNO3 to both oxidizers did not have a significant affect on the specific impulse of the bi-propellants. Consequently LiNO3 could be an appropriate additive for the reduction of the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants.
Źródło:: Central European Journal of Energetic Materials; 2018, 15, 1; 162-174
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Basic Characteristics for Estimation Polynitrogen Compounds Effciency
Autorzy:: Smirnov, A.
Lempert, D.
Pivina, T.
Khakimov, D.
Powiązania:: https://bibliotekanauki.pl/articles/358464.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: polynitrogen compounds
oxidizers
hypothetic nitrogen allotropes
enthalpy of formation
density
detonation parameters
sensitivity
Opis:: Basing on analysis of experimental data for physicochemical parameters of 300 energetic compounds from different chemical classes, a set of basic characteristics (enthalpies of formation, molecular crystals densities, detonation parameters, as well as sensitivity to different kinds of impact) has been considered and some calculations schemes have been elaborated to estimate these characteristics for polynitrogen compounds. The limits of physicochemical values for energetic materials (EMs) parameters have been estimated. A large set of compounds has been investigated and some of them seem to be rather effective as explosives or monopropellants. There are about ten powerful compounds (e.g. octanitrocubane, hexanitrohexaazaisowurtzitane, azanitrofurazan, etc.), explosives- oxidizers (such as ammonium dinitroamide and bis(difuroamine-dini troethil) nitroamine) and several hypothetic substances (not synthesized yet), such as octaazacubane, octaazatetraen, tetranitrotetraazacubane etc. Energetic properties were estimated as for individual compounds, as well as for energetic compositions containing these substances together with other ones in the aim to estimate the effectiveness of their use as components of solid composite propellants.
Źródło:: Central European Journal of Energetic Materials; 2011, 8, 4; 233-247
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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