By M. Gaune-Escard (auth.), David H. Kerridge, Evgeny G. Polyakov (eds.)

ISBN-10: 904815054X

ISBN-13: 9789048150540

ISBN-10: 9401591350

ISBN-13: 9789401591355

This NATO complex study Workshop was once dedicated to a really expert subject in molten salt chemistry and was once held in an unique situation (as some distance as Westerners have been involved) good in the Arctic Circle. It however facilitated a fruitful week, either ofscience and ofhuman contacts. The forty two oral shows and posters from 9 nations enabled the fifty nine contributors to benefit greatly approximately many components of modern study within the molten salt chemistry of refractory metals, whereas making new contacts in addition to renewing previous friendships. The time ofinformal touch ledto the beginningofa numberofnew learn cooperations with interchangeofpersonnel. hence the dual aimsofadvancing technological know-how and bettering East-West figuring out have been either amply fulfilled. certainly a hot and satisfied relations surroundings used to be very tangible doth throughout the clinical periods and the social occasions, which members, accompanying individuals and native staffall loved. this chance of dwelling for a short while in the Arctic Circle was once a novelty for many Westerners, who as a rule favored the very hot climate (the most popular for two decades in response to a few residents), in addition to the attractive atmosphere ofvery eco-friendly birch/pine wooded area, dashing rivers,vast lakes and rounded mountains,frequently illuminated via fantastic sunsets. The night fish fry beside Lake Imandra (100 km lengthy) and the trainer journey beside the attractive White Sea dotted with islands within the Kandalaksha leisure zone (National Park), to pattern Pomor tradition, dancing and clean salmon soup, have been excessive spots ofthe social programme.

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Extra resources for Refractory Metals in Molten Salts: Their Chemistry, Electrochemistry and Technology

Example text

Error bars representing the reproducibility of several measurements at constant temperature are indicated. All systems including that with oxide addition revealed a single NMR resonance line. Referring to the crystallographic analyses of the solid [24] and to Raman spectra of the melts [25], the Nbs+-ions in these systems form NbCI ~ complexes. So we expect that the 93Nb line is due to that complex. For the sample with addition ofNazO a mixture ofNbCI ~ and NbOCI ~- ions must be considered. 2).

Attack after 6 min. could be seen by macroscopic inspection. Fig. 8 TEST OF THERMALSTABILITY Thermal stability in air and vacuum (Tab. 6) were tested on a thermal balance under vacuum and air environments for 3 hrs. Environment air, normal pr essur e air, normal pressu re vacuum [10 mPa] Temp . [0C] 950 1200 1200 weight loss [mg] 3 9 -- Tab. 9 WE AR TEST Samples of borid ed tantalum have been tested with the pin on disk method. The disk for testing was borid ed steel. 7, the test length s: 1000 m.

101, pp. 16 10. , Vargas T. (1987),J. ofApplied Electrochem. , 17, pp. M. (1987),]. 225-242 12. M. , (1983) , Inorg . Chern . 22, pp. 2099 13. (1992), Thesis. Univers ite Paris VI , Paris . HIGH TEMPERATURE 93Nb NMR STUDY OF LIQillD NbCIs AND ITS MIXTURES WITH VARIOUS ALKALI CHLORIDES E. SCHELLKES, M. HOLZ AND W. FREYLAND Institute ofPhysical Chemistry and Electrochemistry, University ofKarlsruhe, D-76128 Karlsruhe, Germany Abstract Liquid NbCIs and its mixtures with different alkali halides have been investigated for the first time by 93Nb NMR at temperatures up to 900K.

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Refractory Metals in Molten Salts: Their Chemistry, Electrochemistry and Technology by M. Gaune-Escard (auth.), David H. Kerridge, Evgeny G. Polyakov (eds.)


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