Reactivity of δ‐ and θ‐ Al2O3 for ZnAl2O4 formation
- 1 June 1976
- journal article
- research article
- Published by Wiley in Zeitschrift für anorganische und allgemeine Chemie
- Vol. 423 (2) , 180-184
- https://doi.org/10.1002/zaac.19764230212
Abstract
The rate of ZnAl2O4 formation was measured for δ‐ and θ‐A1203 in order to distinguish the reactivity of them. The reaction rate fitted to JANDER' equation and the activation energy calculated were 53 Kcal/mol for θ‐A1203 system and 73, 79, 57, 71 Kcal/mol for δ‐A1203(l), (2), (3), (4) systems, respectively. The fact that θ‐A1203 shows very high reactivity compared with that of δ‐A1203 was found to result from the larger specific surface area of θ‐A1203. The reactivity of δ‐A1203 changed by the conditions of preparation of boehmite which is a starting material of alumina.Keywords
This publication has 1 reference indexed in Scilit:
- Reactivity of η‐, γ‐, and α‐Al2O3 for ZnAl2O4 FormationZeitschrift für anorganische und allgemeine Chemie, 1975