Studies of the polymorphic transformations of dicalcium silicate (Ca2SiO4) and sodium tetrafluoroberyllate (Na2BeF4) by Thermosonimetry and differential scanning calorimetry |
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| Authors: | J L Holm K Lønvik |
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| Institution: | (1) Institute of Silicate Science and High Temperature Chemistry, The Technical University of Norway, N-7034 Trondheim, NTH, Norway;(2) Institute of Experimental Physics, The Technical University of Norway, N-7034 Trondheim, NTH, Norway |
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| Abstract: | The polymorphic transformations of Ca2SiO4 and Na2BeF4H, have been studied by thermosonimetry, TS. The results for Na2BeF4 are compared with results from DSC-investigations. Thermosonimetry is shown to be a good and sensitive method for studying solid state transformations with high activation energies which accompany the   -Ca2SiO4  -Ca2SiO4 and the -Na2BeF4-Na2BeF4 transformations.
Zusammenfassung Die polymorphen Umlagerungen von Ca2SiO4 und Na2BeF4 wurden thermosonimetrisch untersucht. Die für Na2BeF4 erhaltenen Ergebnisse werden mit Ergebnissen von DSC-Untersuchungen verglichen. Es wird gezeigt, dass die Thermosonimetrie eine gute und empfindliche Methode zur Untersuchung der hohe Aktivierungsenergien erfordernden Festkörperumlagerungen –Ca2SiO4  –Ca2SiO4 und –Na2BeF4 –Na2BeF4 ist.
                       Ca2SiO4 Na2BeF4.  Na2BeF4   .   ,    ,    , , -Ca2SiO4 ¡ -Ca2SiO4 -Na2BeF4 -Na2BeF4.
This work has been supported by Borgestads Legat IV to J.L. Holm. |
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