The simple Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is mainly composed of|??¨¬?¡§|-Al2O3-Cr2O3 strong answer, and also the secondary one is fire-resistance brick with small quantity of spinel (or no spinel) and Chromium Oxide, which is only 1%-30% of all. The chromium corundum is two kinds, 1 casting chromium corundum brick and the other sintering chromium corundum brick. Usually, the chromium corundum brick is sintering chromium corundum brick. This sort of brick is produced of|??¨¬?¡§|-Al2O3, adding correct amount of powder of Chromium Oxide and chromium corundum under the condition of higher temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is usually much less than that in casting 1. Another method to create the chromium corundum brick would be to adopt slip casting that the workers mix the|??¨¬?¡§|-Al2O3 powder with Chromium Oxide uniformly, and add peptizer and organic binder till the state is thickened slurry, meanwhile, they ought to add some chromium corundum into the thickened slurry. Following that the adobe may be formed and then sintered. (Chrome Oxide Green Refractory  )

The chromium corundum brick is used in many fields such as the glass furnace lining, cover brick for drawing glass flow hole and backing for hot metal pretreatment equipment, Waste incinerators, and coal-water slurry gasifiers.

To tell the truth, chromium corundum can be seen in many exhibitions because red corundum is primarily composed of |??¨¬?¡§|- alumina, also known as chromium corundum, ruby. Now there's most artificial red corundum in the marketplace. French chemist Framy fused the raw material like pure aluminum powder, potassium carbonate, barium fluoride and potassium dichromate for 8days in high temperature in crucibles to gain little particles of ruby crystals, which is the beginning of the artificial ruby. In 1900, scientists have used melt aluminum oxide with adding a small amount of Ceramic Color Pigment, Cr2O3, in proportion of 0.7%, to create out of 2g ~~ 4g ruby. Now, it has been able to manufacture rubies and sapphires big enough to reach 10g. There was some high-quality artificial ruby in Geneva and Switzerland in 1885. It was said that the particles of ruby with potassium dichromate that may increase the red impact, when the mixed products had been sintered in higher temperature, the quality was exactly the same as natural ruby. Nevertheless, that the artificial ruby could be made in large mode should be contributed to French chemist Verneuil. He made the artificial ruby officially in 1904, that is the milestone in the manufacture history of ruby, chromium corundum. Because of the large scale of production, Chrome Oxide Green Cr2O3 Pigment  steadily entering the luxury fields.