White corundum and brown corundum are both types of corundum, but there are some differences between them and they are widely used in different fields. Below, we will introduce the characteristics and application fields of white corundum and brown corundum respectively.
1、 Compositional differences
Brown corundum, also known as alumina brown corundum, is mainly composed of aluminum oxide (Al ₂ O3) and contains small amounts of impurities such as iron, silicon, and titanium. The presence of these impurities gives brown corundum a brownish color and endows it with hardness and toughness; White corundum, also known as alumina white corundum, is mainly composed of alumina (Al ₂ O ∝), but with low impurity content, resulting in a white or grayish white color. Due to its low impurity content, white corundum has relatively high purity and hardness.
2、 Performance comparison
Hardness: The hardness of white corundum is slightly higher than that of brown corundum, which makes white corundum have good wear resistance and cutting performance when processing high hardness materials; Resilience: Due to the presence of a certain amount of impurities, brown corundum has relatively good toughness and can resist impact and vibration to a certain extent, making it suitable for harsh processing environments; Heat resistance: Both white corundum and brown corundum have good heat resistance and can maintain stable performance at high temperatures. But relatively speaking, the heat resistance of white corundum is slightly better than that of brown corundum; Chemical stability: Both have high chemical stability and are not easily reacted with chemicals such as acids and bases. However, under specific conditions, such as strong acid or alkali environments, brown corundum may be subject to a certain degree of corrosion.
3、 Application Fields
Brown corundum: Due to its excellent toughness and wear resistance, brown corundum is widely used in processing fields such as grinding, polishing, cutting, etc., especially in situations where the surface quality of the workpiece is not high, such as rough machining, deburring, etc. In addition, brown corundum can also be used as a grinding medium, filler, etc; White corundum: Due to its high hardness and purity, white corundum has a wide range of applications in the processing field, such as high-precision grinding, polishing, etc. Meanwhile, white corundum can also be used to manufacture refractory materials, ceramics, etc.
In short, although both white corundum and brown corundum are types of corundum, there are significant differences between them and they are widely used in different fields. Both the industrial and cosmetic medical fields play important roles.
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