The easy Introduction of Ceramic Color Pigment know as ruby

Chromium corundum is primarily composed of|??¨¬?¡§|-Al2O3-Cr2O3 strong 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 kinds, 1 casting chromium corundum brick and 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 usually less than that in casting 1. An additional method to produce 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 in to the thickened slurry. After that the adobe may be formed and then sintered. (Chrome Oxide Green Refractory  )

The chromium corundum brick is used in many 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 inform the truth, chromium corundum can be noticed in many exhibitions simply because red corundum is mainly composed of |??¨¬?¡§|- alumina, also referred to as chromium corundum, ruby. Now there's 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 gain small particles of ruby crystals, that is the beginning from 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 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 stated that the particles of ruby with potassium dichromate that can improve the red effect, when the mixed products were sintered in higher temperature, the quality was the same as all-natural ruby. However, that the artificial ruby might be produced 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. Because of the large scale of production, Chrome Oxide Green Cr2O3 Pigment  steadily entering the luxury fields.