The simple Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is mainly composed of|??¨¬?¡§|-Al2O3-Cr2O3 solid answer, and also 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 sorts, 1 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 produced of|??¨¬?¡§|-Al2O3, adding proper amount of powder of Chromium Oxide and chromium corundum under the condition of high temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is generally less than that in casting 1. An additional technique 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 in to the thickened slurry. After that the adobe can 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 gear, Waste incinerators, and coal-water slurry gasifiers.

To tell the truth, chromium corundum can be noticed in numerous exhibitions because red corundum is mainly composed of |??¨¬?¡§|- alumina, also referred to as chromium corundum, ruby. Now there's 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 acquire small particles of ruby crystals, that is the beginning of the artificial ruby. In 1900, scientists have utilized melt aluminum oxide with adding a little amount 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 said that the particles of ruby with potassium dichromate that can improve the red effect, when the mixed products had been sintered in high temperature, the quality was the same as natural ruby. Nevertheless, that the artificial ruby could be made in big mode should 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. Due to the big scale of production, Chrome Oxide Green Cr2O3 Pigment  gradually entering the luxury fields.