Reaktion #1056430
ord-69b45b23230441c49dfccd7148f0c2cd
Reaktionsgleichung
Edukte
Reagenzien
Lösungsmittel
Reaktionsbedingungen
Aufarbeitung
- 1Sonstigegiving a total volume of 1000 cm3
Vorschrift
375.13 g of aluminum nitrate hydrate [Al(NO3)3·9H2O, manufactured by Wako Pure Chemical Industries Ltd., guaranteed reagent] was dissolved in pure water, giving a total volume of 1000 cm3, to obtain 1155 g of an aluminum nitrate aqueous solution. Of these solution, to 250 cm3 of this aluminum nitrate aqueous solution was added 7.08 g of the seed crystal slurry obtained by the same operation as in Example 1 [Preparation of seed crystal slurry], then, 34.1 g of 25% ammonia water (manufactured by Wako Pure Chemical Industries Ltd., guaranteed reagent) was added at a feeding rate of 2 g/minute by using a micro rotary pump while stirring at 75° C. In completion of addition, slurry of pH 3.9 containing a hydrolysate of aluminum nitrate was obtained. This slurry was maintained for 7 days, then, dried at 20° C. by using a rotary evaporator to obtain a dry powder. This powder was ground by using a mortar, then, charged into an alumina crucible. The alumina crucible was placed in a box-type electric furnace. The powder was heated up to 1000° C. at a rate of 300° C./h in air, and calcined at 1000° C. for 3 hours, to obtain an α-alumina particulate. The properties of this α-alumina particulate are shown in Table 1. The photograph of the α-alumina particulate is shown in FIG. 2.