| 摘要 |
Ultra low alpha( alpha )-emitting aluminum hydroxide and a process for making it from triethylaluminum; when the latter contains alpha -radiation-emitting contaminants, the process comprises (i) fractionating substantially unhydrolyzed triethylaluminum into an uncontaminated fraction having an ultra low alpha -radiation flux and a fraction containing substantially all of the alpha -radiation-emitting contaminants, (ii) separating the two fractions, and (iii) hydrolyzing the uncontaminated fraction with water having an ultra low alpha -radiation flux; Al2O3 prepared from said aluminum hydroxide; and ceramics made from said Al2O3. |
