| 摘要 |
1,142,065. Producing Al 2 O 3- IWATANI & CO. Ltd. 11 Nov., 1966 [29 Dec., 1965], No. 50590/66. Heading C1A. [Also in Divisions B3, C5 and H3] Finely divided Al 2 O 3 is produced by charging a mixture of water and 3 mm. Al pellets into a reactor having two graphite plate electrodes, and initiating a spark discharge between the electrodes by means of a series oscillatory circuit (see Division H3).
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