Comparison between forming reactivity and densification of aluminium titanate starting from various alumina qualities

espanolLa sinterizacion reactiva del titanato de aluminio ha sido estudiada a 1450 y 1500 C para tres diferentes a-alumina comerciales y una con alto contenido en alumina. La velocidad de conversion en esta ultima alumina es muy elevada, pero es necesario altas temperaturas para sinterizarla. La sinterbilidad del titanato de aluminio a partir de a-aluminas de bajo costo es comparable con las de alta pureza y por lo tanto este oxido parece comercialmente prometedor. Las adiciones de MgO tan bajas como 2 % en peso mejora notablemente la sinterizacion reactiva de las a-aluminas y reduce el tamano de gran medio. EnglishThe reactive sintering of Aluminium Titane has been studied at 1450 and 1500 C for three different commercial a-Aluminas and one with high —Alumina content. The conversion rate of this latter Alumina is very high, but to have it sintered a higher firing temperature is required. The sinterability of Aluminium Titanate starting from a low-cost commercial a-Alumina is comparable with that from an expensive high purity Alumina and therefore this oxide seems commercially promising. MgO additions as little as 2 wt %strongly improve the reactive sintering process from the a-Aluminas and always reduce the average grain size.