We can supply this material, ongoing, month by month , in a very high quality.

Common Name: Alumina Single Crystal.
Chemical Name: Artificial Corundum
Ingredients : Aluminum oxide (Al2O3)

This material is based on the Kyropoulos method, that is growing large single crystals for optical purposes.
The seed crystal is mounted onto a seed crystal holder cooled by water and the raw material melts in the crucible. Crystallization starts when the seed contacts the melt. The crystal grows into the melt forming a hemisphere. When the crystal gets bigger and approaches the walls of the crucible the seed crystal holder together with the grown crystal rises by a few mm and the growth continues till the crystal reaches the walls of the crucible again.
The main advantage of Kyropoulos method is that the size of the grown crystal is limited only by the size of the crucible, so the boule may be as big as 300 mm in diameter and more.
Kyropoulos method is widely used for growing sapphire crystals of a very high optical quality. Kyropulos sapphire is suitable for manufacturing ingots and substrates for LED and RF applications, windows, lenses, any kind of precision optics, watch glasses etc.