GLASS FOR MANUFACTURING OF GRADIENT ELEMENTS BY ION EXCHANGE METHOD Russian patent published in 1997 - IPC

Abstract RU 2082685 C1

FIELD: production of optic and acoustic elements. SUBSTANCE: glass comprises, mol %: SiO₂, 40-54 mol; Na₂O, 5-30; Si₂O, 0.1-24; TiO₂, 15-25; ZrO₂, 3-9; Sb₂O₃, 0.2-0.3. Said glass also may comprise one of oxide being chosen of calcium oxide CaO, strontium oxide SrO, barium oxide BaO, niobium oxide having essential formula Nb₂O₅ and tantalum oxide having essential formula Ta₂O₅; quantity of said chosen oxide being 5 mol %. Summary amount of lithium oxide and sodium oxide is 20-25 mol %. Index of refraction of proposed glass is 1.691-1.728. EFFECT: improved quality. 2 cl, 4 tbl

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RU 2 082 685 C1

Authors

Livshits V.Ja.

Dates

1997-06-27—Published

1992-10-30—Filed