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Why does the tabular corundum turn black

The color of the slab corundum is white. In many cases, the quality of the slab corundum can be known only by observing the color of the slab corundum. However, many customers will find that sometimes it is inevitable that the tabular corundum will appear black or blue particles. So what is the reason for the black corundum?
Tabular corundum is a high-toughness artificial abrasive, which has good economic effects when used for heavy-duty abrasion. Tabular corundum has a microcrystalline structure of α-Al2O3, high toughness, it can withstand great grinding pressure without breaking, and can cut thicker metal layers.

1. The smelting time is not enough, and it can also be considered that the smelting process is immature, resulting in the low purity of the tabular corundum itself, and the high impurity content, and the color may show small black spots;
2. Black impurities, such as the impurities carried by the body are not cleaned or deliberately mixed and rubbed, which may cause the tabular corundum to appear black spots.
3. Iron rust. The plate-shaped corundum itself contains iron oxide, which may be removed for cleanliness. In the production process, the color of the plate-shaped corundum may be impure due to the accidental mixing of rust due to mechanical rust;
The pure and impure color of slab corundum is one of the inspection standards for the quality of slab corundum, and the quality of slab corundum is not up to standard, which also has a great influence on the function of slab corundum, such as hardness and grinding force. . For this, Tabula;Tabular Alumina Manufacturer has a strict requirement on itself.

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