F:Flammable;
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7440-23-5Relevant articles and documents
Audubert, R.
, p. 197 - 205 (1939)
Hanson, H. G.
, p. 491 - 494 (1957)
Dynamics of Nonadiabatic Reactions. 2. F + Na2 ---> NaF + Na*
Arrowsmith, P.,Bly, S. H. P.,Charters, P. E.,Chevrier, P.,Polanyi, J. C.
, p. 4716 - 4723 (1989)
Chemiluminescence from the reaction F + Na2 ---> NaF + Na*(i) has been measured for six electronically excited states of Na: the upper state of the D line, 32P, and the more energetic states i=32D, 52S, 42D, 6s
Formation of porous carbon materials with in situ generated NaF nanotemplate
Huang, Chih-Hao,Chang, Yu-Hsu,Wang, Hsiao-Wan,Cheng, Soofin,Lee, Chi-Young,Chiu, Hsin-Tien
, p. 11818 - 11822 (2006)
Porous carbon materials with pore sizes from 3 to 200 nm were synthesized by reacting hexafluorobenzene with Na liquid at 623 K. NaF crystals, a byproduct formed in the reaction, acted as nanotemplate to assist the pore formation. By employing hexafluorobenzene to react with Na incorporated within the channels (diameter 200 nm) of anodized aluminum oxide (AAO) membranes at 323-623 K, the carbon material can be fabricated into aligned porous nanotube arrays (ca. 250 nm in diameter, ca. 20 nm in wall thickness, ca. 0.06 mm in length, and ca. 3-90 nm in pore diameter). These materials were characterized by X-ray diffraction, scanning and transmission electron microscopy, X-ray energy dispersive spectroscopy, electron diffraction, thermal gravimetric analysis, and nitrogen physical adsorption experiments.
Complete analysis of the Na+3 fragmentation in collision with He atoms
Barat,Brenot,Dunet,Fayeton,Picard,Babikov,Sizun
, p. 233 - 238 (1999)
An experimental investigation of the fragmentation mechanisms of Na+3 cluster ions in collision with He atoms at 263 eV centre-of-mass energy is presented. The relative populations of the three fragmentation pathways are determined. In particular, the kinematics of the three-body breakup is studied in detail. The analysis of the correlation between the velocity vectors of the fragments allows one to estimate the relative role of the electronic excitation or momentum transfer in the population of each pathway. The discussion of the fragmentation dynamics is based on a concomitant theoretical study.
Thermodynamic study of sodium-iron oxides Part II. Ternary phase diagram of the Na-Fe-O system
Huang, Jintao,Furukawa, Tomohiro,Aoto, Kazumi
, p. 67 - 72 (2003)
Studies on ternary phase diagrams of the Na-Fe-O system have been carried out from the thermodynamic point of view. Thermodynamic data of main ternary Na-Fe oxides Na4FeO3(s), Na3FeO3(s), Na5FeO4(s) and Na8Fe2O 7(s) have been assessed. A user database has been created by reviewing literature data together with recent DSC and vapor pressure measurements by the present authors. New ternary phase diagrams of the Na-Fe-O system have been constructed from room temperature to 1000 K. Stable conditions of the ternary oxides at 800 K were presented in predominance diagram as functions of oxygen pressure and sodium pressure.
KINETICS OF IRON-SODIUM DISILICATE REACTIONS AND WETTING.
Tomsia,Pask
, p. 523 - 528 (1981)
Chemical bonding in glass-to-metal combination was investigated for maximum adherence conditions. Thermogravimetric and sessile drop measurements were used to study kinetics of redox reactions between sodium disilicate glass and iron. This study was undertaken to evaluate the nature of the reactions between iron and sodium disilicate (NS//2) as a function of time, temperature, and nature of the ambient atmosphere.
Husain, David,Plane, John M. C.
, (1982)
Pike, E. W.
, p. 687 - 687 (1933)
McTaggart, F. K.
, (1965)
Bardwell, D. C.
, p. 2499 - 2499 (1922)
Plane, John M. C.,Husain, David
, (1986)
Thermodynamic study of sodium-iron oxides Part I. Mass spectrometric study of Na-Fe oxides
Huang, Jintao,Furukawa, Tomohiro,Aoto, Kazumi
, p. 61 - 66 (2003)
Vaporization behavior of Na4FeO3(s) was thermodynamically studied from 590 to 717 K by means of high temperature mass spectrometry. It was found that Na4FeO3(s) decomposed into Na3FeO3(s) a
Distribution of platinum particles in the bimodal micropore system of activated carbon
Onyestyak, Gyoergy
, p. 1889 - 1896 (2008/03/13)
Platinum (Pt)/activated-carbon catalysts were prepared and characterized by pore-size distribution (PSD), propane-sorption dynamics, and activity of cyclohexane dehydrogenation to benzene. The batch-type frequency-response (FR) spectroscopic technique was applied to determine the mass-transport rate of propane sorption. Two parallel sorption processes of different time constants were distinguished, suggesting that adsorption proceeds in smaller and larger micropores that are not interconnected. Increasing Pt loading affected the propane mobility, but increased the dehydrogenation activity only up to ca. 1 wt-% of Pt content. It was concluded that clusters of metallic Pt-atoms are located preferentially at the narrowest pores. Blocking these micropores, the Pt reduces the carbon surface available for sorption; also, a significant fraction of the metal becomes inaccessible for the reactant.
Synthesis and characterization of amide-borohydrides: New complex light hydrides for potential hydrogen storage
Chater, Philip A.,Anderson, Paul A.,Prendergast, James W.,Walton, Allan,Mann, Vicky S.J.,Book, David,David, William I.F.,Johnson, Simon R.,Edwards, Peter P.
, p. 350 - 354 (2008/10/09)
The reactions xLiNH2 + (1 - x)LiBH4 and xNaNH2 + (1 - x)NaBH4 have been investigated and new phases identified. The lithium amide-borohydride system is dominated by a body centred cubic compound of formula Li4BH4(NH2)3. In the sodium system, a new hydride of approximate composition Na2BH4NH2 has been identified with a primitive cubic structure and lattice parameter a ≈ 4.7 ?. The desorption of gases from the two amide-borohydrides on heating followed a similar pattern with the relative proportions of H2 and NH3 released depending critically on the experimental set-up: in the IGA, ammonia release occurred in two steps - beginning at 60 and 260 °C for Li4BH4(NH2)3 - the second of which was accompanied by hydrogen release; in the TPD system the main desorption product was hydrogen-again at 260 °C for Li4BH4(NH2)3 accompanied by around 5% ammonia. We hypothesize that the BH4- anion can play a similar role to LiH in the LiNH2 + LiH system, where ammonia release is suppressed in favour of hydrogen. The reaction xLiNH2 + (1 - x)LiAlH4 did not result in the production of any new phases but TPD experiments show that hydrogen is released from the mixture 2LiNH2 + LiAlH4, over a wide temperature range. We conclude that mixed complex hydrides may provide a means of tuning the dehydrogenation and rehydrogenation reactions to make viable storage systems.