Reaction equation
O.[N+:2]([O-:5])([O-:4])=[O:3].[Al+3:6].[N+:7]([O-:10])([O-:9])=[O:8].[N+:11]([O-:14])([O-:13])=[O:12]>O>[N+:2]([O-:5])([O-:4])=[O:3].[Al+3:6].[N+:7]([O-:10])([O-:9])=[O:8].[N+:11]([O-:14])([O-:13])=[O:12]Participants
Reactant 1
Product 1
Reagents, catalysts & solvents 1
Procedure
375.13 g (1 mol) of aluminum nitrate hydrate [Al(NO3)3.9H2O, manufactured by Wako Pure Chemical Industries, Ltd.] was dissolved in pure water, to obtain 1000 cm3 of an aluminum nitrate aqueous solution. To 100 cm3 of the aluminum nitrate aqueous solution was added 2.83 g (Al2O3 quantity: 0.566 g) of the above-mentioned seed crystal slurry, and this mixture was charged into a vessel of rotary evaporator. The pressure of an atmosphere in the vessel was reduced, and the vessel were heated by water of 75° C., to remove water in the mixture, obtaining powder. 100 parts by-weight of this powder contained 10 parts by weight of alumina [Al2O3] as a seed crystal. The powder was charged into an alumina crucible, and the alumina crucible was placed in a box-type electric furnace. It was calcined for 3 hours in air-of 850° C. The resulted α-alumina powder had an average primary particle diameter of 96 nm. The α-ratio and BET specific surface area of this α-alumina powder are shown in Table 1. The photograph of the α-alumina power is shown in FIG. 1.
Sources & evidence
- ORD record
- ord-1deaca27917942279a18c96ca51c61d8
- Source dataset
- uspto-grants-2008_04
- Patent number
- US07351394B2
Linked notes
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