The easy 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 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. Generally, the chromium corundum brick is sintering chromium corundum brick. This sort of brick is produced of|??¨¬?¡§|-Al2O3, adding correct quantity of powder of Chromium Oxide and chromium corundum below the situation of higher temperature. The quantity of Chromium Oxide in sintering chromium corundum brick is generally 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 should add some chromium corundum in to the thickened slurry. After that the adobe may be formed and after that sintered. (Chrome Oxide Green Refractory  )

The chromium corundum brick is utilized in many fields such as 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 inform the truth, chromium corundum may be seen in many exhibitions because red corundum is primarily 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 higher temperature in crucibles to acquire little particles of ruby crystals, that is the beginning of 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 make 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 said that the particles of ruby with potassium dichromate that may improve the red effect, when the mixed items were sintered in higher 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, that is the milestone within the manufacture history of ruby, chromium corundum. Due to the big scale of production, Chrome Oxide Green Cr2O3 Pigment  steadily getting into the luxury fields.