What are principle methods for growing synthetic sapphire?

The principle methods for growing synthetic sapphire are Verneuil, Kyropoulos (HEM), Stepanov (EFG), Czochralski, Bagdasarov. The biggest crystals with best optical quality can be produce by Bagdasarov, Kyropoulos and Czochralsky methods.

Similar questions

Synthetic sapphire growing
We are looking for a supplier of non-Verneuil Ruby material, 0.125 dia X 1.500 long (inches) fine grind OD. 1,000 pcs to 5,000 pieces annually. If this Ruby material available as Kyropoulos material for a semi-con application?
What are principle methods for growing synthetic sapphire?
We are planning to produce corundum and emeral for jewelry by method of flux growth in furnace, do you have them? Please, get us in detail about your products, if any.
Hello, i'm looking for a 1000 mm long tube with 63 od and 1.5 mm thickness. I will use the tube to take pictures of micro-particles inside so I need the tube to have a good superdificial quality. Could you send me an offer for the item?
Do you produce single crystal? Our company wanna to purchase the sapphire for making substrate?
I have some poor quality grown sapphire capillaries (~2mm od x 1mm id, 80mm long, capped at one end). I am wondering if I can anneal these to remove microfractures. What temperature would be needed and should the annealing be done in vacuum, inert gas (He, or Ar) or in hydrogen? Obviously I am also looking for another supplier — do you sell small quantities (5-10 units) of single crystal sapphire capillaries in sizes similar to above?
What raw material is used to make your sapphires? It is alpha aluminum oxide, I know, but is this alpha A12O3 made out of bauxite, or is it chemically synthesized?

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