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(续上期)2陶瓷金卤灯电弧管壳的原材料目前陶瓷金卤灯电弧管管壳均采用高纯Al2O3制成。为制造符合要求的陶瓷金卤灯电弧管,Al2O3粉体的纯度要求在99·99%以上,其中几种主要杂质必须限制在规定含量以下。半透明陶瓷电弧管壳中的主要杂质含量指标见表4。陶瓷金卤灯电弧管壳体的成
(Continued) 2 The raw materials of the ceramic metal halide arc tube shell The current ceramic metal halide arc tube shell is made of high purity Al2O3. In order to manufacture the ceramic arc tube with satisfactory performance, the purity of Al2O3 powder is above 99.99%, and several kinds of main impurities must be limited below the specified content. Translucent ceramic arc tube shell in the main impurity content indicators in Table 4. Ceramic metal halide arc tube shell into