Synthetic Approaches to Aluminum Nitride via Pyrolysis of a Precursor
1986; Wiley; Volume: 1; Issue: 2 Linguagem: Inglês
10.1111/j.1551-2916.1986.tb00007.x
ISSN0883-5551
Autores Tópico(s)Advanced ceramic materials synthesis
ResumoThe preparation of a target compound, AI(NH2)3, was attempted by various means including the preparation of an intermediate, KAI(NH2)4, by anodic oxidation of aluminum in liquid ammonia. A metathetical reaction of AIBr3 with KNH2 in liquid ammonia led to a solid having the empirical formula corresponding to (AI(NH2)NH)n. A similar stoichiometry is observed in the product of the reaction between AIH3 · Et2O and ammonia in ether. Conversion of the amide-imide into the nitride was studied by TG/DTA and infrared spectroscopy. Aluminum nitride starts to form at 600°C. The reaction of aluminum vapors and ammonia in a metal atom reactor yields amorphous AIN at room temperature. The synthetic approach involving AIH3 gives better control of purity and the possibility of controlling the morphology of the solid.
Referência(s)