Solid-Liquid Equilibrium. Systems of Lithium Hydride with Lithium Oxide, Calcium Hydride, Titanium Hydride, and Zirconium Hydride

Journal Article · Sat Jul 01 00:00:00 EDT 1961 · Journal of Chemical and Engineering Data

DOI:https://doi.org/10.1021/je00103a004· OSTI ID:4802708

MESSER, CHARLES E.; MELLOR, JOHN; KROL, JOHN A.; LEVY, IRA S.

BS>Solid-liquid equilibrium was investigated by the method of thermal analysis. The system LiH- Li₂O was studied from 0 to 14 mole% Li₂O and the system LiH- CaH₂ from 0 to 37 mole % CaH₂. The other two systems were investigated only at 8.0 plus or minus 0.3 mole% titanium hydride and zirconium hydride in LiH. ln the LiH-Li₂O and LiH-CaH/ systems, eutectics were found at 654.3 + 0.3-C and 9.3 ole % Li₂O and at 614.0 plus or minus 0.3° C and 18.3 mole % CaH₂. In both systems the cooling run liquidus temperatures were lower than the warming run values. The eutectic temperatures from warming and cooling agreed in the CaH₂ system; in the Li₂O system, the warming run value was 3° plus or minus 1 °C higher. These differences are presumably due to relatively slow achievement of equilibrium during the melting and freezing processes, The differences between the liquidus temperatures of the mixtures with titaniuim and zirconium hydrides and those of the correspondtng samples of LiH alone are tabulated. With one possible exception, the differences are zero within the experimental errors of temperature measurement. In the zirconium hydride runs, and in most of the titanium hydride runs, the hydrogen contents were high enough to favor the existence of the metal-hydrogen systems in the relatively more ionic delta and gamma phases, respectively.

• Research Organization: Tufts Univ., Medford, Mass.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-007545
• OSTI ID: 4802708
• Journal Information: Journal of Chemical and Engineering Data, Journal Name: Journal of Chemical and Engineering Data Journal Issue: 3 Vol. 6; ISSN 0021-9568
• Publisher: American Chemical Society
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALLOTROPY
CALCIUM HYDRIDES
COOLING
EUTECTICS
HIGH TEMPERATURE
LIQUIDS
LITHIUM HYDRIDES
LITHIUM OXIDES
MIXING
PHASE DIAGRAMS
SOLIDS
TABLES
TEMPERATURE
TITANIUM HYDRIDES
ZIRCONIUM HYDRIDES