Table 2.
Kinetic parameters, including the activation energy, Ea, Avrami exponent, n, and the reaction constant, k, along with the corresponding R2 correlation factor values for the crystallization of HAp from ACP obtained from different kinetic models.
| Model | Kinetic parameter | Value | R2 |
|---|---|---|---|
| Kissinger | Ea (kJ/mol) | 434.8 | 0.99957 |
| ΔH (kJ/g) | 1.22 | / | |
| Augis-Bennett | Ea (kJ/mol) | 438.8 | 0.99959 |
| ΔH (kJ/g) | 1.38 | / | |
| Ozawa | Ea (kJ/mol) | 450.3 | 0.99961 |
| ΔH (kJ/g) | 1.36 | / | |
| Piloyan | n | 2.48 | 0.99973 |
| 3.20 | 0.98744 | ||
| Johnson-Mehl-Avrami | n | 3.13 | 0.99329 |
| k (min−n) | 0.15 | 0.99329 |