Sealing glass compositions
AssigneeJohnson Matthey PLC
InventorsMasyood Akhtar, Kim C. Le, Jess Pedigo, Charles H. Smith
Life of this patent
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Abstract
A sealing glass composition suitable for bonding ceramic surfaces at low temperatures and which includes in weight percent 5-50% thallium oxide, 10-40% vanadium oxide, 5-30% tellurium oxide, 1.5-15% arsenic oxide and 1-5% phosphorous oxide. Other additives may be included, such as bismuth oxide. A paste formulated from said glass and a filler for the purpose of adjusting the fluidity and/or dielectric constant of the paste.
Claims16
A sealing glass composition suitable for use in bonding to a ceramic surface at low temperatures comprising in weight percent 0.5-50% thallium oxide, 10-40% vanadium oxide, 5-30% tellurium oxide, 1-15% arsenic oxide, 1-5% phosphorous oxide, 0-10% magnesium chloride, 0-10% barium oxide, 0-10% barium chloride, 0-10% strontium oxide, 0-10% strontium chloride, 0-5% antimony oxide, 0-3% indium oxide, 0-5% silica, 0-5% alumina, 0-15% copper oxide, 0-10% cobalt oxide, 0-15% of each of lithium oxide, sodium oxide and potassium oxide, 0-25% lead oxide and 0-10% silver oxide.
Dependencies are inferred from the claim text.