Internal Cation Mobilities in the Molten Binary System(Na,NH<sub>4</sub>)NO<sub>3</sub>

Haibara, Teruo; Odawara, Osamu; Okada, Isao

doi:10.1515/zna-1989-0610

Cited by 2 publications

(4 citation statements)

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“…c The values are calculated from the data book [61]; for NH 4 NO 3 , the data are taken from [29]. d For NaNO 3 , the values at 300 • C are extrapolated ones, since the melting point is a little higher.…”

Section: Methodsmentioning

confidence: 99%

“…It has previously been found that, in (Na, NH 4 )NO 3 , NH + 4 is more mobile than Na + under all realizable conditions of temperatures and concentrations [29]. Since NH 4 NO 3 decomposes thermally rather rapidly above 240 • C [60], as mentioned above, the temperature has to be kept below 180 • C and the concentration of NH + 4 , x NH 4 , should be above 0.7, where u Na < u NH 4 at high concentrations of NH 4 NO 3 [29].…”

Section: Mobility Order Ofmentioning

confidence: 98%

“…Since NH 4 NO 3 decomposes thermally rather rapidly above 240 • C [60], as mentioned above, the temperature has to be kept below 180 • C and the concentration of NH + 4 , x NH 4 , should be above 0.7, where u Na < u NH 4 at high concentrations of NH 4 NO 3 [29]. The case is quite similar for (Li, NH 4 )NO 3 , where u Li < u NH 4 [64].…”

Section: Mobility Order Ofmentioning

confidence: 99%

“…In this mixture, the isotherms of the internal mobilities have been measured from ca. 0.7 < x NH 4 < 1 at 160 -180 • C [29] (as the melting point of NH 4 NO 3 is reported to be 169.6 • C [30], it presumably exists as the super-cooled liquid at 160 • C). In this concentration range, NH + 4 is more mobile than Na + , but the slopes of the isotherms as a function of the concentration are considerably different.…”

Section: Introductionmentioning

confidence: 99%

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High Enrichment of ⁶Li in Molten Nitrates by the Klemm Method

Okada¹,

Nomura²,

Haibara³

2013

Zeitschrift Für Naturforschung A

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The Klemm method of isotopic enrichment (countercurrent electromigration of molten salts) and many of its implications are reviewed and discussed. On the basis of this principle, a small amount of 6 Li was enriched in some experiments from its original abundance, 7.6%, to 94.9% at about 300 • C. The variation of the conditions led to a modified setup where, by disposing a small amount of NaNO 3 between the catholyte ( NH 4 NO 3 ) and the zone of LiNO 3 , the frontal part, where 6 Li is to be enriched, could be kept stable under high current density for more than one month without any problem of corrosion. The reasons and implications of this new step are discussed, underlining the up-to-dateness of Klemm's experiment.

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Section: Methodsmentioning

confidence: 99%