Gold free alloys for firing on ceramic compositions
AssigneeDegussa AG
InventorGerhard Zwingmann
Life of this patent
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Abstract
There is provided a gold free alloy for firing on ceramic compositions, especially for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, and the balance consisting essentially of cobalt. There can also be present up to 1 weight % boron, up to 20 weight % molybdenum and/or tungsten, up to 8 weight % scandium, yttrium, lanthanum and/or the rare earths and up to 5 weight % aluminum, silicon, tin, indium and/or gallium.
Claims22
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, 0.2 to 1 weight % boron, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing molybdenum, tungsten, or a mixture of molybdenum and tungsten, said molybdenum, tungsten, or mixture thereof being present in an amount of up to 20 weight %, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, also containing boron, the boron being present in an amount of up to 1 weight % and containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight %, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 5-40 weight % palladium, 3-25 weight % chromium, containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.
A dental ceramic composition having fired thereon as a facing of gold free alloy selected from the group consisting of (1) 1-70 weight % palladium, 0.1-35 weight % chromium and the balance consisting essentially of cobalt, (2) 1-70 weight % palladium, 0.1-35 weight % chromium, boron, the boron being present in an amount of up to 1 weight % and the balance consisting essentially of cobalt, (3) 1-70 weight % palladium, 0.1-35 weight % chromium, at least one member of the group consisting of molybdenum and tungsten, said member being present in an amount of up to 20 weight % and the balance consisting essentially of cobalt, (4) an alloy as in (3) but also containing boron, the boron being present in an amount of up to 1%, (5) an alloy as in (4) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (6) an alloy as in (3) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (7) an alloy as in (2) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (8) an alloy as in (1) also containing at least one element from the group consisting of scandium, yttrium, lanthanum and another rare earth element, said element being present in an amount of up to 8 weight %, (9) an alloy as in (8) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (10) an alloy as in (7) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (11) an alloy as in (6) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (12) an alloy as in (5) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (13) an alloy as in (4) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (14) an alloy as in (3) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (15) an alloy as in (2) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, (16) an alloy as in (1) also containing at least one element from the group consisting of aluminum, silicon, tin, indium and gallium, said element being present in an amount of up to 5 weight %, or (17) consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing molybdenum, tungsten or mixture of molybdenum and tungsten, said molybdenum, tungsten or mixture thereof being present in an amount of up to 20 weight %, containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, said element or mixture of elements being present in an amount of up to 8 weight % and the balance consisting essentially of cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting of 25-35 weight % palladium, 5-15 weight % chromium, 5-15 weight % molybdenum, tungsten or a mixture thereof, 2-6 weight % cerium, 0.2-0.8 weight % boron and the balance cobalt.
A gold free alloy suitable for firing on ceramic compositions for dental purposes consisting essentially of 1-70 weight % palladium, 0.1-35 weight % chromium, also containing an element which is scandium, yttrium, lanthanum, another rare earth or mixture of such elements, such element or mixture of elements being present in an amount of up to 8 weight %, and containing aluminum, silicon, tin, indium, gallium, or mixture thereof, said aluminum, silicon, tin, indium, gallium, or mixture thereof being present in an amount of up to 5 weight %, and the balance consisting essentially of cobalt.
Dependencies are inferred from the claim text.