aluminum oxide

例句：

1. 1. This materialis used in the production of aluminum alloys.
   这种材料用于生产铝合金。
2. 2. Thealumina powder was used to coatthe surface of the glass.
   氧化铝粉末被用来涂覆玻璃的表面。
3. 3. Aluminum oxideis a common component in manytypes of paints and coatings.
   氧化铝是许多类型油漆和涂层的常见成分。