FIELD: radio engineering, electronics. SUBSTANCE: invention refers to compositions of glasses used in manufacture of magnetic heads for videorecording and computation equipment. For increase of crystallization stability and microhardness of glass while joining compounds of ceramic and metal elements of magnetic heads glass includes following components, per cent by mass: V2O5 49.0-60.0; B2O3 0.01-1.1; PbO 4.5-11.0; ZnO 0.01-0.9; BaO 0.01-1.0; P2O5 16.0-20.0; Sb2O5 13.0-25.0; BI2O3 0.01-2.5; CuO 0.001-0.1. Coefficient of thermal expansion of glass is (81-86)·10-71/deg, To=318-336 C, Tn.d= 352-368 C, Tmelt= 370-385 C; Tgr=480-495 C, microhardness is 363-390 kgf/mm2. Time for emergence of first symptoms of crystallization on surface of spreading drop of glass is 50-65 min. EFFECT: improved efficiency of process.
Title | Year | Author | Number |
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LOW-MELTING GLASS FOR MAGNETIC HEADS | 1991 |
|
RU2016863C1 |
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LOW-MELTING GLASS FOR JOINING MAGNETIC HEAD COMPONENTS | 1987 |
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LOW-MELTING GLASS FOR MAGNETIC HEADS | 1988 |
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COMPOSITION OF EASILY FUSIBLE GLASS CERAMIC MATERIAL | 2000 |
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GLASS FOR SEALING OF MAGNETIC HEADS ELEMENTS | 0 |
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GLASS, MAINLY, FOR INSULATION OF ALUMINUM CONDUCTOR WIRING | 1992 |
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GLASS FOR SEALING OF INTEGRATED MAGNETIC HEADS BASED ON SILICON SUBSTRATE | 1986 |
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Authors
Dates
1995-11-20—Published
1990-02-09—Filed