- Tytuł:
- The Kinetics of Spinel Formation of Algerian Halloysite by Differential Thermal Analysis
- Autorzy:
-
Heraiz, M.
Sahnoune, F.
Belhouchet, H.
Raghdi, A.
Ouali, A. - Powiązania:
- https://bibliotekanauki.pl/articles/1033398.pdf
- Data publikacji:
- 2017-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
81.70.Pg
81.20.Ev
82.20.-w - Opis:
- The kinetics of spinel (Al-Si) crystallization from Algerian halloysite (DD1) was investigated using differential thermal analysis. Experiments were carried out on samples between room temperature and 1400°C with constant heating rate from 2 to 20°C min¯¹. The activation energies measured from isothermal and non-isothermal treatments were 1054.85 and 1140 kJ mol¯¹, respectively, for the spinel (Al-Si) formation. The Avrami constant n obtained by the Ligero method and the m parameter obtained by the Matusita method were about 2 for spinel crystallization. This value indicates that the crystallization mechanism of Al-Si spinel phase proceeds by bulk nucleation of the phase formation with a constant number of nuclei and that the three-dimensional growth of crystals is controlled by diffusion.
- Źródło:
-
Acta Physica Polonica A; 2017, 131, 1; 139-142
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł