The easy Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is primarily composed of|??¨¬?¡§|-Al2O3-Cr2O3 solid answer, and also the secondary 1 is fire-resistance brick with small amount of spinel (or no spinel) and Chromium Oxide, which is only 1%-30% of all. The chromium corundum is two sorts, one casting chromium corundum brick and the other sintering chromium corundum brick. Generally, the chromium corundum brick is sintering chromium corundum brick. This kind of brick is produced of|??¨¬?¡§|-Al2O3, adding proper quantity of powder of Chromium Oxide and chromium corundum below the condition of higher temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is usually less than that in casting 1. An additional 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 until the state is thickened slurry, meanwhile, they should add some chromium corundum into the thickened slurry. After that the adobe may be formed and then sintered. (Chrome Oxide Green Refractory  )

The chromium corundum brick is used in numerous 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 noticed in numerous exhibitions because red corundum is mainly 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 acquire small particles of ruby crystals, which is the beginning from 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 make out of 2g ~~ 4g ruby. Now, it has been able to manufacture rubies and sapphires big sufficient to attain 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 improve the red impact, when the mixed items had been sintered in higher temperature, the quality was exactly the same as natural ruby. However, that the artificial ruby could be produced in big mode must be contributed to French chemist Verneuil. He produced the artificial ruby officially in 1904, that is the milestone within the manufacture history of ruby, chromium corundum. Because of the big scale of production, Chrome Oxide Green Cr2O3 Pigment  steadily getting into the luxury fields.