LOW-MELTING GLASS Russian patent published in 2004 - IPC

FIELD: glass industry.

SUBSTANCE: invention relates to low-melting non-crystallizing glass designated for soldered joints, passivation and hermetic sealing of micro-assemblies and units in instrument making industry, electronic engineering and radioelectronics, in particular, as a soldered joint and sealing agent used in setting up and assembling resonator quartz monometric blocks. Glass comprises components taken in the following ratio, wt.-%: Bi₂O₃, 24.8-47.0; PbO, 33.8-59.3; ZnO, 8.3-12.3; SiO₂, 2.0-2.5; Bi₂O₃, 5.6-6.8. Glass temperature coefficient of linear expansion (TCLE) is (110-115) x 10^-7K^-1, soldering point is 450-470^oC. Invention provides reducing TCLE value for providing the coordination of glass TCLE value with material to be soldered.

EFFECT: improved and valuable properties of glass.

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