The simple Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is primarily composed of|??¨¬?¡§|-Al2O3-Cr2O3 strong answer, and the secondary one is fire-resistance brick with little 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 sort of brick is produced of|??¨¬?¡§|-Al2O3, adding proper amount of powder of Chromium Oxide and chromium corundum below the situation of high temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is generally less than that in casting one. Another method to produce 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 should add some chromium corundum into the thickened slurry. After that the adobe can 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 inform the truth, chromium corundum can be seen in numerous exhibitions simply because red corundum is mainly composed of |??¨¬?¡§|- alumina, also referred to as chromium corundum, ruby. Now there is 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, that is the beginning of the artificial ruby. In 1900, scientists have used 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 enough to attain 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 impact, when the mixed products were sintered in high temperature, the quality was exactly the same as natural ruby. Nevertheless, that the artificial ruby could be produced in large 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. Due to the large scale of production, Chrome Oxide Green Cr2O3 Pigment  gradually getting into the luxury fields.