Phase diagram study of CaBr2–LiBr system using DTA
The phase diagram of binary LiBr–CaBr2 system was investigated using differential thermal analysis (DTA) between room temperature and 800 °C. From the DTA results obtained over the entire range of composition from pure LiBr to pure CaBr2 in steps of ~5 mol%, the phase diagram was constructed and is reported here. The results indicated the possible existence of a compound at 50 mol% LiBr, namely, LiCaBr3. The compound undergoes peritectic decomposition at 552 °C. The system shows a eutectic reaction at 532 °C between this compound and LiBr phase, and the eutectic composition is close to 80 mol% LiBr. The compound LiCaBr3 decomposes into CaBr2 and LiBr phases below 272 °C. Co-existing phases in different phase fields are characterized by X-ray diffraction analysis.
KeywordsCaBr2 LiBr Phase diagram DTA Alkaline earth halide Alkali halide Peritectic
- 1.Smith CA. Berkeley Nuclear Laboratories, Central Electricity Generating Board, U.K., Report. 1972; R/D/BN-2331.Google Scholar
- 2.Holden RB, Fuhrman N. In: Proceedings of the international conference on sodium technology and large fast reactor design held at Argonne, Illinois, during 7–9 November, 1968, U.S. Atomic Energy Commission Report. 1968; ANL-7520-1:262-7.Google Scholar
- 3.Gnanasekaran T, Mahendran KH, Sridharan R, Ganesan V, Periaswami G, Mathews CK. An electrochemical hydrogen monitor for measuring dissolved hydrogen in liquid sodium. Nucl Technol. 1990;90:408–16.Google Scholar
- 7.Mahendran KH, Nagaraj S, Sridharan R, Gnanasekaran T. Differential scanning calorimetric studies on the phase diagram of the binary LiCl–CaCl2 system. J Nucl Mater. 2001;325:78–83.Google Scholar