Frequently Asked Questions

1. What is the sapphire crystal?
2. What is maximum sizes of the Sapphire crystals?
3. What is application of the Sapphire crystals?
4. What is the difference between natural and synthetic sapphire?
5. Is sapphire used in lasers?
6. Is it true that a ruby laser was used to scan the Moon surface from Earth to accurately map its topography?
7. Can Sapphire be uses as a transparent window?
8. I have found information that after special treatment corundum has tensile strength 2 GPa. Can you confirm this information? Who may manufacture such corundum?
9. I would like to know what size tubes you have available, and their pressure rating, I wish to use them as a view pressure vessel, approx 50 - 100ml volume. I would also like some additional information about the preferred method of sealing to 316L stainless steel end plates I need to manufacture. The pressure I am shooting for is approx 350BAR.
10. 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?
11. The 2 GPa tensile strength of corundum has not been confirmed by anyone else, either.    So I will assume that the tensile strength of sapphire monocrystal is 400 MPa.  I have further questions: 1) if sapphire is subjected to essentially constant tension of e.g. 350 MPa, does it experience fatigue? 2) Can you make a sapphire plate, whose width is given by a given Gaussian function (maximum e.g. 40 mm in the center), thickness about 1 mm, and length about 200 mm?
12. I would like to have thermal properties of r-plane.
13. What is the difference between “random orientation” and a specific orientation (C-axis is not always the best, A-plane is actually easier to grind and polish, etc.).
14. 1) if sapphire is subjected to essentially constant tension of e.g. 350 MPa, does it experience fatigue? 2) Can you make a sapphire plate, whose width is given by a given Gaussian function (maximum e.g. 40 mm in the center), thickness about 1 mm, and length about 200 mm?
15. May you write me what is the difference between the fusion and latent melting heats in the case of sapphire, please? What their physical meanings are?
16. I would like to ask you to send me further thermal data of sapphire. May you write me the heats of fusion and evaporation of sapphire, please?
17. What is the technical sapphire?
18. What is meaning of Repture modulus?
19. What are principle methods for growing synthetic sapphire?

Ask Your Question!

Name:


e-Mail:


Question: