The simple Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is primarily composed of|??¨¬?¡§|-Al2O3-Cr2O3 solid solution, and the secondary 1 is fire-resistance brick with small quantity of spinel (or no spinel) and Chromium Oxide, that is only 1%-30% of all. The chromium corundum is two kinds, one casting chromium corundum brick and also the other sintering chromium corundum brick. Usually, the chromium corundum brick is sintering chromium corundum brick. This kind of brick is made of|??¨¬?¡§|-Al2O3, adding proper quantity of powder of Chromium Oxide and chromium corundum under the situation of higher temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is usually much less than that in casting 1. An additional method to create the chromium corundum brick is to adopt slip casting that the workers mix the|??¨¬?¡§|-Al2O3 powder with Chromium Oxide uniformly, and add peptizer and organic binder until 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 numerous fields like 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 may be noticed in numerous exhibitions because red corundum is primarily composed of |??¨¬?¡§|- alumina, also referred to as chromium corundum, ruby. Now there is most artificial red corundum on the market. French chemist Framy fused the raw material like pure aluminum powder, potassium carbonate, barium fluoride and potassium dichromate for 8days in higher temperature in crucibles to gain little particles of ruby crystals, which is the starting from the artificial ruby. In 1900, scientists have used melt aluminum oxide with adding a small quantity of Ceramic Color Pigment, Cr2O3, in proportion of 0.7%, to create out of 2g ~~ 4g ruby. Now, it has been in a position to manufacture rubies and sapphires big sufficient to reach 10g. There was some high-quality artificial ruby in Geneva and Switzerland in 1885. It was stated that the particles of ruby with potassium dichromate that may increase the red effect, when the mixed products had been sintered in high temperature, the quality was exactly the same as all-natural ruby. However, that the artificial ruby might be made in big mode must be contributed to French chemist Verneuil. He made the artificial ruby officially in 1904, which is the milestone within the manufacture history of ruby, chromium corundum. Because of the big scale of production, Chrome Oxide Green Cr2O3 Pigment  gradually entering the luxury fields.