Phase diagram cuspidine (3CaO center dot 2SiO(2) center dot CaF2)-CaF2

Authors
Watanabe, T Fukuyama, H Susa, M Nagata, K
Citation
T. Watanabe et al., Phase diagram cuspidine (3CaO center dot 2SiO(2) center dot CaF2)-CaF2, MET MAT T B, 31(6), 2000, pp. 1273-1281
Citations number
16
Categorie Soggetti
Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN journal
10735615 → ACNP
Volume
31
Issue
6
Year of publication
2000
Pages
1273 - 1281
Database
ISI
SICI code
1073-5615(200012)31:6<1273:PDC(CD>2.0.ZU;2-V
Abstract
Equilibrium phase diagram for the system cuspidine (3CaO . 2SiO(2 .) CaF2)- CaF2 has been studied by the quenching method and differential thermal anal ysis (DTA). Hermetically closed platinum capsules were used in both methods to prevent fluorine loss in the form of HF and SiF4 by reaction of the CaF 2 with water vapor or SiO2. Cuspidine congruently melts at 1680 +/- 2 K. Th e cuspidine-CaF2 system presents a simple eutectic type of phase diagram. T he eutectic composition and temperature are 46 mass pet 3CaO . 2SiO(2) - 54 mass pet CaF2 and 1515 +/- 3 K, respectively.