ORNL-1771 - Oak Ridge National Laboratory

ANP QUARTERLY PROGRfSS REPORT
Flammability OF Sodium Alloys
M. E. Steidlitz L, L. Hall
G. P. Smith
Metallurgy Divi s ion
2 2 G. P. Smith
- Y 0 0 ' & I
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The studies of the flammability of liquid sodium
alloys, whish were reported previ~usly,~ were ex-
tended, It has been found that the degree of re-
action of jets of sodium-bismuth and sodium-nercury
alloys is not significantly changed when the pres-
sure of air is varied from 0.25 to 1.0 atm.
Additioncrl data on the reactivity of sodium-
bismuth solutions in dry air were obtained, and
the results are summarized in Figs. 6.20 and &21.
Figure 6.20 Show5 the limits of the region of no
reaction on a temperature-composition diagram. A
careful calibration of the flammability apparatus
has shown that there was a substantial error in the
temperatures previously reported in these tests.
In this respect the earlier data have been corrected.
The circles represent the temperature-composition
values at which tests were conducted. The numeral
by each circle gives the number of tests. The un-
shaded circles represent tests which showed re-
7G. P.Smith ond M. E. Steidlitz, ANP Quar. PTO~. Rep.
Der. 10, 19.53, ORNL-1649, p 96.
600 ~
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NO REACTION
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action, while the rest showed slight reaction. The
cross-hatched band demarks the approximate I imits
within which the line separating the region of
reaction from the region of no reaction lies. Figure
6.21 shows how the rate of reaction was found to
vary with composition at constant temperature. The
rate scale is arbitrary, with no reaction given the
value zero and that of pure sodium given the value
4. Further work is being done to determine the
flamnrability temperature for pure bismuth,
L
~ ~i-~- 1
0 3 04 05 06 I O
MOLE FR4CTION OF SODIUM
Fig. 6.21. Relative Reaction Rate of Sodium-
Bismuth Solutions at 7QQT as a
Ternparatuse.
Function of
06
%?rrnodynarnics of Alkali-Metal Hydroxides
C. R. Boston
Metal lurgy Bivi s ian
Free Energy of Formation Data. Numerical data
for the standard free energies of formation of the
alkal i-metal hydroxides and related compounds are
nn essential guide in studies of hydroxide chemistry.
Therefore the free energy data hove been computed
CIS a function of temperature for the hydroxide, the
peroxide, and the superoxide of sodium. The data
are presented in Fig. 6.22, together with the data
far the oxide and water which are used in subsequent
Values of the standard free energy of formation
at 25°C are available8 for sodium oxide, sodium
peroxide, and sodium superoxide. The value for
sodium hydroxide may be computed readily from
the values for he standard heat of formation of
Fig. 6.20. Temperature-Corrrposition Diagram
Showing Regions Within Which Jets of Sodium-
Bismuth Solutions Did and Did Mot React with Dry
Air. 'I-, Brewer, Chern. Reu. 52, 6 (1953).
1 02