ITEMS OUT OF SPINEL Russian patent published in 2008 - IPC C30B29/26 C30B33/00 H01S5/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to process of fabricating items with spinel crystal structure, such as plates, paddings and active facilities comprising them. According to one version a monocrystal spinel plate is fabricated by treatment of melt and has a non-stoichometric composition defined with a common formula aAD.bE₂O₃, in which A is chosen out of group including Mg, Ca, Zn, Mn, Ba, Sr, Cd, Fe and their combinations as well, E is chosen out of group including Al, In, Cr, Sc, Lu, Fe and their combinations, while D is chosen out of group O, S, Se, and their combinations as well; at that ratio b:a>2.5:1, so that spinel is enriched with E₂D_3. Besides a monocrystal spinel material is opened possessing a non-stoichometric composition having a window within the range of waves from 400 to 800 nm. Such items possess reduced mechanical tensions, which facilitates increased output of accepted items.

EFFECT: facilitating increased output of spinel items.

32 cl, 5 tbl, 13 dwg