Reaktion #1056429
ord-1f16bc54722a49e18db4e0787c3ca2ec
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. 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, 41 g of 25% ammonia water (manufactured by Wako Pure Chemical Industries Ltd., guaranteed reagent) was added at a feeding rate of 2 g/min by using a micro rotary pump while stirring at 25° C. In completion of addition, slurry of pH 4 containing a hydrolysate of aluminum nitrate was obtained. This slurry was charged into a bat made of stainless steel, the bat was placed in a thermostat, and water was evaporated by heating up to 100° C. in air, to obtain a dry powder containing a hydrolysate and a seed crystal. This powder was charged into an alumina crucible, the alumina crucible was placed in a box-type electric furnace. The powder was heated up to 950° C. at a rate of 300° C./h in air, and calcined at 950° C. for 3 hours, to obtain an α-alumina particulate. The properties of this α-alumina particulate are shown in Table 1.