Method for producing aluminum titanate sintered object

Details Method for producing aluminum titanate sintered object Method for producing aluminum titanate sintered object

C - Chemistry, Metallurgy

04

B

C04B 35/46 (2006.01) C04B 35/478 (2006.01)

Patent

CA 2396857

The present invention provides a process for preparing an aluminum-titanate-based sintered body comprising the step of firing, at 1250 to 1700°C, a formed product prepared from a raw material mixture containing 100 parts by weight of a mixture of TiO2 and Al2O3 in a weight ratio of TiO2 : Al2O3 = 40 : 60 to 60 : 40, and 1 to 15 parts by weight of an alkali feldspar represented by the formula :(NaxK1-x) AlSi3O8 wherein 0>=×<=1. According to the process of the present invention, it is possible to obtain an aluminum-titanate-based sintered body in which inherent properties of an aluminum titanate, i.e., a low coefficient of thermal expansion and high corrosion resistance are maintained, the mechanical strength thereof is improved, and which can be stably used even under high temperature conditions.

L'invention concerne un procédé permettant la production d'un objet fritté en titanate d'aluminium. Ce procédé est caractérisé en ce qu'on prépare un article formé à partir d'un matériau mixte comprenant 100 parties en poids d'un mélange contenant du TiO2 et de l'Al2O3 selon les proportions suivantes (premier : second, rapport pondéral) : 40 :60 à 60 :40, et 1 à 15 parties en poids d'un feldspath alcalin représenté par la formule chimique : (NaxK1-x)AlSi3O8 (0 </= x </= 1), et on cuit cet article à une température comprise entre 1250 et 1700 DEG . Ce procédé permet la production d'un objet fritté en titanate d'aluminium qui tout en conservant le faible coefficient d'expansion thermique caractéristique des objets frittés en titanate d'aluminium et présente des propriétés mécaniques améliorées et peut être utilisé à des températures élevées.

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