EP2420583B1 - Jewellery made from perfectly white, tarnish-proof noble metal alloy - Google Patents
Jewellery made from perfectly white, tarnish-proof noble metal alloy Download PDFInfo
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- EP2420583B1 EP2420583B1 EP11005688.4A EP11005688A EP2420583B1 EP 2420583 B1 EP2420583 B1 EP 2420583B1 EP 11005688 A EP11005688 A EP 11005688A EP 2420583 B1 EP2420583 B1 EP 2420583B1
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- platinum
- alloy
- rhodium
- palladium
- gold
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
- A44C27/003—Metallic alloys
Definitions
- the invention relates to a piece of jewelry, such as Schrnuck, clock, jewelry, writing instrument.
- Previously known jewelry alloys have not reached the color and gloss of rhodium and were in particular not sufficiently tarnish-resistant. Pure rhodium is only of limited use for the production of jewelery such as jewelery, watches, jewelery or high-quality writing utensils because it is difficult to melt and pour, and rhodium can only be shaped well when hot. In addition, his powder metallurgical processing is very expensive and does not meet the high standards of gloss and polishability.
- a precious metal jewelery alloy which has 40 to 70% by weight of rhodium and 60 to 30% by weight of platinum, with the proportions by weight of rhodium and platinum being essentially equal to 100% by weight.
- An advantageous development of the invention provides that the precious metal jewelry alloy 45 to 70 wt .-% rhodium and 55 to 30 wt .-% platinum.
- the US 3,779,728 describes a high temperature resistant alloy consisting of platinum, rhodium and one or more other metals.
- the US 2005/0265888 A1 describes an alloy that is particularly suitable for high temperature application. It has 1 to 41 wt .-% of palladium and platinum in such an amount that is defined at a proportion of palladium from 1 to 14%, the proportion of platinum by the formula (40 + X), where X is the proportion of the existing Palladium is, and that the proportion of 15 to 41% palladium, the proportion of platinum is up to 54% and the remainder rhodium, wherein the rhodium content is at least 24%.
- the US 2008/0232999 A1 describes a jewelery alloy comprising 45 to 55 wt% platinum and 55 to 45 wt% palladium.
- the additives from the group of platinum metals or non-platinum metals are added, these additives, in particular replacing palladium.
- the piece of jewelry is made of an alloy which rhodium in a weight fraction of 47 to 53 wt .-% and platinum in a weight fraction of 53 to 47 wt .-%, and that the jewelry alloy optionally ruthenium , Iridium and / or gold in a proportion by weight of up to 20 wt .-%, in which case platinum is replaced by ruthenium, iridium and / or gold, and that the jewelery alloy further preferably palladium in a weight fraction of up to 30 wt .-% in which case platinum is replaced by the abovementioned palladium, and in that the proportions by weight of rhodium, platinum and optionally ruthenium, Iridium, gold and / or palladium, other than usual admixtures and impurities, are 100% complementary.
- the precious metal jewelry alloy of the jewelery according to the invention has 48 to 52 wt .-% rhodium and 52 to 48 wt .-% platinum.
- the jewelery alloy of the jewelery according to the invention comprises about 50% by weight of rhodium and about 50% by weight of platinum.
- the alloy of the piece of jewelry according to the invention is characterized in that it has tarnish resistance and an ideal white color. It has a hard hardness in the range of 350 to 370 HV and a soft hardness in the range of 160 to 170 HV and thus meets the requirements of the watch and jewelry industry in terms of sufficient wear resistance and the durability of filigree constructions.
- the jewelery alloy according to the invention has the advantage that it is not brittle and therefore easily deformable, in particular by hot forming. Another advantage of the alloy according to the invention is that it is particularly well suited for jewelry casting by the lost wax process.
- the precious metal jewelery alloy of the jewel according to the invention comprises ruthenium, iridium and / or gold up to a proportion of up to 20% by weight, whereby platinum is replaced by ruthenium, iridium and / or gold, so that the proportions of rhodium and platinum and the aforementioned admixtures add up to substantially 100% by weight.
- platinum is replaced by ruthenium, iridium and / or gold, so that the proportions of rhodium and platinum and the aforementioned admixtures add up to substantially 100% by weight.
- a further advantageous development of the invention provides that the precious metal jewelery alloy has palladium in a proportion by weight of up to 30%, with platinum being replaced by palladium.
- Such a measure has the advantage that in this way the expensive platinum can be replaced by the cheaper palladium without significantly impairing the high-quality properties of the noble metal jewelery alloy according to the invention.
- the precious metal jewelery alloy will be explained with reference to an exemplary embodiment in which 40 to 70, preferably 50 wt% Rh and 60 to 30, preferably 50 wt% Pt are used.
- the latter alloy has an atomic ratio Rh / Pt of 65:35, so that two-thirds of the atoms of the alloy are rhodium atoms.
- the proportion of rhodium and / or platinum thus replenishes substantially to 100 wt .-%, apart from conventional admixtures and impurities.
- the precious metal jewelery alloy 45 to 70 wt .-% rhodium and 55 to 30 wt .-% of platinum, again preferred that the content of rhodium is preferably 45 to 65 wt .-%, more preferably 47 to 53 Wt .-% and particularly preferably 48 to 52 wt .-%, and that the content of platinum 55 to 30 wt .-%, preferably 55 to 35 wt .-%, more preferably 53 to 47 wt .-% and in particular 52 to 48 wt .-% is.
- the above alloy with about 50% by weight rhodium and about 50% by weight platinum is sufficient to achieve the ideal white color and luster of electrodeposited rhodium or at least approximately this white color and luster to achieve.
- the described alloy is very well suited for investment casting by the lost wax process, whereby conventional equipment and investments can be used for the casting of platinum alloys.
- the castings made of the described alloy have little to no porosity, the hardness is 160 to 170 HV, and surface defects due to reactions with investment material were practically not observed.
- the unexpectedly low solidification shrinkage of the described alloy compared to other jewelry materials such as platinum 950 or white gold 750 prevents shrinkage porosity, which is a major problem in jewelery casting.
- Another advantage is that gas and embedding mass reactions are almost impossible since both rhodium and platinum have high chemical resistance.
- a further advantage of the described alloy in connection with jewelery casting is that castings produced by jewelery have dimensions close to the final dimensions, which, in conjunction with good re-pourability, results in an economical use of material.
- a wire made from the described alloy has a hardness in the range of 160 to 170 HV in the soft state and from 350 to 370 HV in the hard state. From the described alloy it is therefore possible to produce simple semi-finished products, wherein good deformability can be achieved by hot forming.
- Ruthenium, iridium and / or gold can also be added to the precious metal jewelry alloy described in a proportion by weight of up to 20% by weight, with platinum being replaced by ruthenium, iridium and / or gold, so that the proportions of rhodium and platinum and the aforementioned admixtures add up to substantially 100 wt .-%.
- the described precious metal jewelry alloy in a particularly advantageous manner for the production of ideal white, tarnish jewelery, such as jewelry of all kinds, jewelery, watches, watch cases and writing instruments, to name a few of the preferred applications enumerate, is suitable.
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Description
Die Erfindung betrifft ein Schmuckstück, wie Schrnuck, Uhr, Juwelierware, Schreibgerät.The invention relates to a piece of jewelry, such as Schrnuck, clock, jewelry, writing instrument.
In der Schmuck- und Uhrenindustrie wird eine besonders weiße Metallfarbe einer Schmucklegierung gewünscht, da hierdurch der Glanz von weißen Edelsteinen, insbesondere von Diamanten, in besonders guter Weise unterstützt wird. der besten weißen Farbe ist. Der Nachteil einer galvanischen Rhodinierung liegt in deren begrenzter Lebensdauer, da die üblicherweise 0,2 µm dicke Rhodiumschicht durch den Gebrauch des Schmuckstücks verschlissen wird. Das Weißgold-Grundmaterial des Schmuckstücks wird dadurch sichtbar und beeinträchtigt das Erscheinungsbild des Schmuckstücks, da der Glanz und die Farbe von Weißgold schlechter als die von Rhodium ist.In the jewelery and watch industry, a particularly white metal color of a jewelery alloy is desired, since in this way the gloss of white gemstones, in particular of diamonds, is supported in a particularly good manner. the best white color is. The disadvantage of a galvanic rhodium plating lies in their limited life, since the usually 0.2 micron thick rhodium layer is worn by the use of the jewelry piece. The white gold base material of the piece of jewelry is thereby visible and affects the appearance of the piece of jewelry, since the gloss and the color of white gold is worse than that of rhodium.
Bisher bekannte Schmucklegierungen haben die Farbe und den Glanz von Rhodium nicht erreicht und waren insbesondere auch nicht ausreichend anlaufbeständig. Reines Rhodium eignet sich nur begrenzt zur Herstellung von Schmuckstücken wie Schmuck, Uhren, Juwelierwaren oder hochwertigen Schreibgeräten da es sich nur schwierig schmelzen und gießen lässt und Rhodium nur warm gut verformbar ist. Außerdem ist seine pulvermetallurgische Verarbeitung sehr aufwendig und erfüllt nicht die hohen Ansprüche an Glanz und Polierbarkeit.Previously known jewelry alloys have not reached the color and gloss of rhodium and were in particular not sufficiently tarnish-resistant. Pure rhodium is only of limited use for the production of jewelery such as jewelery, watches, jewelery or high-quality writing utensils because it is difficult to melt and pour, and rhodium can only be shaped well when hot. In addition, his powder metallurgical processing is very expensive and does not meet the high standards of gloss and polishability.
Es ist daher Aufgabe der vorliegenden Erfindung, eine ideal-weiße, anlaufbeständige Edelmetall-Schmucklegierung zu schaffen, die sich insbesondere zur Herstellung von Schmuckstücken wie Schmuck, Uhren, Juwelierwaren oder Schreibgeräte eignet.It is therefore an object of the present invention to provide an ideal white, tarnish precious metal jewelry alloy, which is particularly suitable for the production of jewelry such as jewelry, watches, jewelry or writing instruments.
Diese Aufgabe wird erfindungsgemäß durch eine Edelmetall-Schmucklegierung gelöst, die 40 bis 70 Gew.-% Rhodium und 60 bis 30 Gew.-% Platin aufweist, wobei sich die Gewichtsanteile von Rhodium und Platin im Wesentlichen zu 100 Gew.-% ergänzen.This object is achieved according to the invention by a precious metal jewelery alloy which has 40 to 70% by weight of rhodium and 60 to 30% by weight of platinum, with the proportions by weight of rhodium and platinum being essentially equal to 100% by weight.
Eine vorteilhafte Weiterbildung der Erfindung sieht vor, dass die Edelmetall-Schmucklegierung 45 bis 70 Gew.-% Rhodium und 55 bis 30 Gew.-% Platin aufweist.An advantageous development of the invention provides that the precious metal jewelry alloy 45 to 70 wt .-% rhodium and 55 to 30 wt .-% platinum.
Die
Die
Die
Es ist Aufgabe der vorliegenden Erfindung, Schmuckstücke wie ein Schmuck, eine Uhr, eine Juwelierware und ein Schreibgerät aus einer Edelmetall-Schmucklegierung zu schaffen, welches die Farbe und den Glanz von galvanisch aufgebrachtem Rhodium aufweist oder sich zumindest dieser weißen Farbe und dem Glanz annähert sowie gegen ein Anlaufen beständig ist.It is an object of the present invention to provide jewelry such as a jewelry, a watch, a jewelry and a writing instrument made of a precious metal jewelry alloy, which has the color and gloss of electrodeposited rhodium or at least this white color and the gloss approaches and is resistant to tarnishing.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das Schmuckstück aus einer Legierung hergestellt ist, welche Rhodium in einem Gewichtsanteil von 47 bis 53 Gew.-% und Platin in einem Gewichtsanteil von 53 bis 47 Gew.-% aufweist, und dass die Schmucklegierung wahlweise Ruthenium, Iridium und/oder Gold in einem Gewichtsanteil bis zusammen 20 Gew.-% aufweist, wobei dann Platin durch Ruthenium, Iridium und/oder Gold ersetzt ist, und dass die Schmucklegierung weiter vorzugsweise Palladium in einem Gewichtsanteil von bis zu 30 Gew.-% aufweist, wobei dann Platin durch das vorgenannte Palladium ersetzt ist, und dass sich die Gewichtsanteile von Rhodium, Platin und wahlweise Rutheni-um, Iridium, Gold und/oder Palladium, von üblichen Beimischungen und Verunreinigungen abgesehen, zu 100 % ergänzen..This object is inventively achieved in that the piece of jewelry is made of an alloy which rhodium in a weight fraction of 47 to 53 wt .-% and platinum in a weight fraction of 53 to 47 wt .-%, and that the jewelry alloy optionally ruthenium , Iridium and / or gold in a proportion by weight of up to 20 wt .-%, in which case platinum is replaced by ruthenium, iridium and / or gold, and that the jewelery alloy further preferably palladium in a weight fraction of up to 30 wt .-% in which case platinum is replaced by the abovementioned palladium, and in that the proportions by weight of rhodium, platinum and optionally ruthenium, Iridium, gold and / or palladium, other than usual admixtures and impurities, are 100% complementary.
Eine vorteilhafte Weiterbildung der Erfindung sieht vor, dass die EdelmetallSchmucklegierung des erfindungsgemäßen Schmuckstücks 48 bis 52 Gew.-% Rhodium und 52 bis 48 Gew.-% Platin aufweist.An advantageous development of the invention provides that the precious metal jewelry alloy of the jewelery according to the invention has 48 to 52 wt .-% rhodium and 52 to 48 wt .-% platinum.
Eine weitere vorteilhafte Weiterbildung der Erfindung sieht vor, dass die Schmucklegierung des erfindungsgemäßen Schmuckstücks ungefähr 50 Gew.-% Rhodium und ungefähr 50 Gew.-% Platin aufweist.A further advantageous development of the invention provides that the jewelery alloy of the jewelery according to the invention comprises about 50% by weight of rhodium and about 50% by weight of platinum.
Die Legierung des erfindungsgemäßen Schmuckstücks zeichnet sich dadurch aus, dass sie anlaufbeständig und eine ideal-weiße Farbe besitzt. Sie weist eine Härte hart im Bereich von 350 bis 370 HV und eine Härte weich im Bereich von 160 bis 170 HV auf und erfüllt somit die Anforderungen der Uhren- und Schmuckindustrie in Bezug auf eine ausreichende Verschleißbeständigkeit sowie der Haltbarkeit von filigranen Konstruktionen. Die erfindungsgemäße Schmucklegierung besitzt den Vorteil, dass sie nicht spröde und daher gut verformbar, insbesondere durch Warmumformen, ist. Ein weiterer Vorteil der erfindungsgemäßen Legierung besteht darin, dass sie sich insbesondere sehr gut für Schmuckguss nach dem Wachsausschmelzverfahren eignet.The alloy of the piece of jewelry according to the invention is characterized in that it has tarnish resistance and an ideal white color. It has a hard hardness in the range of 350 to 370 HV and a soft hardness in the range of 160 to 170 HV and thus meets the requirements of the watch and jewelry industry in terms of sufficient wear resistance and the durability of filigree constructions. The jewelery alloy according to the invention has the advantage that it is not brittle and therefore easily deformable, in particular by hot forming. Another advantage of the alloy according to the invention is that it is particularly well suited for jewelry casting by the lost wax process.
Eine vorteilhafte Weiterbildung der Erfindung sieht vor, dass die Edelmetall-Schmucklegierung des erfindungsgemäßen Schmuckstücks Ruthenium, Iridium und/oder Gold bis zu einem Anteil von bis zu 20 Gew.-% aufweist, wobei Platin durch Ruthenium, Iridium und/oder Gold ersetzt wird, so dass sich die Anteile von Rhodium und Platin sowie die vorgenannten Beimischungen im Wesentlichen zu 100 Gew.-% ergänzen. Eine derartige Maßnahme besitzt den Vorteil, dass die Festigkeit der Legierung weiter verbessert wird, ohne Farbe und Glanz bzw. den edlen Charackter der Legierung zu beeinträchtigen.An advantageous development of the invention provides that the precious metal jewelery alloy of the jewel according to the invention comprises ruthenium, iridium and / or gold up to a proportion of up to 20% by weight, whereby platinum is replaced by ruthenium, iridium and / or gold, so that the proportions of rhodium and platinum and the aforementioned admixtures add up to substantially 100% by weight. Such a measure has the advantage that the strength of the alloy is further improved without affecting color and gloss or the noble character of the alloy.
Eine weitere vorteilhafte Weiterbildung der Erfindung sieht vor, dass die Edelmetall-Schmucklegierung Palladium in einem Gewichtsanteil von bis zu 30 % aufweist, wobei Platin durch Palladium ersetzt ist. Eine derartige Maßnahme besitzt den Vorteil, dass hierdurch das teuere Platin durch das billigere Palladium ersetzt werden kann, ohne die hochwertigen Eigenschaften der erfindungsgemäßen Edelmetall-Schmucklegierung wesentlich zu verschlechtern.A further advantageous development of the invention provides that the precious metal jewelery alloy has palladium in a proportion by weight of up to 30%, with platinum being replaced by palladium. Such a measure has the advantage that in this way the expensive platinum can be replaced by the cheaper palladium without significantly impairing the high-quality properties of the noble metal jewelery alloy according to the invention.
Im Folgenden wird die Edelmetall-Schmucklegierung anhand eines exemplarischen Ausführungsbeispiels erläutert, bei dem 40 bis 70, vorzugsweise 50 Gew.-% Rh und 60 bis 30, vorzugsweise 50 Gew.-% Pt verwendet werden. Letztere Legierung besitzt ein Atomverhältnis Rh/Pt von 65 : 35, so dass also zwei Drittel der Atome der Legierung Rhodium-Atome sind. Der Anteil von Rhodium und/oder Platin ergänzt sich also im Wesentlichen zu 100 Gew.-%, wenn man von üblichen Beimischungen und Verunreinigungen absieht.In the following, the precious metal jewelery alloy will be explained with reference to an exemplary embodiment in which 40 to 70, preferably 50 wt% Rh and 60 to 30, preferably 50 wt% Pt are used. The latter alloy has an atomic ratio Rh / Pt of 65:35, so that two-thirds of the atoms of the alloy are rhodium atoms. The proportion of rhodium and / or platinum thus replenishes substantially to 100 wt .-%, apart from conventional admixtures and impurities.
Vorzugsweise weist hierbei die Edelmetall-Schmucklegierung 45 bis 70 Gew.-% Rhodium und 55 bis 30 Gew.-% Platin auf, wobei wiederum bevorzugt wird, dass der Gehalt von Rhodium vorzugsweise 45 bis 65 Gew.-%, weiter vorzugsweise 47 bis 53 Gew.-% und insbesondere vorzugsweise 48 bis 52 Gew.-% beträgt, und dass der Gehalt von Platin 55 bis 30 Gew.-%, vorzugsweise 55 bis 35 Gew.-%, weiter vorzugsweise 53 bis 47 Gew.-% und insbesondere 52 bis 48 Gew.-% beträgt.Preferably, in this case, the precious metal jewelery alloy 45 to 70 wt .-% rhodium and 55 to 30 wt .-% of platinum, again preferred that the content of rhodium is preferably 45 to 65 wt .-%, more preferably 47 to 53 Wt .-% and particularly preferably 48 to 52 wt .-%, and that the content of platinum 55 to 30 wt .-%, preferably 55 to 35 wt .-%, more preferably 53 to 47 wt .-% and in particular 52 to 48 wt .-% is.
Überraschenderweise ergibt sich, dass die vorgenannte Legierung mit ungefähr 50 Gew.-% Rhodium und ungefähr 50 Gew.-% Platin ausreicht, um die ideal-weiße Farbe und den Glanz von galvanisch aufgebrachtem Rhodium zu erreichen oder zumindest annähernd diese weiße Farbe und diesen Glanz zu erzielen.Surprisingly, it appears that the above alloy with about 50% by weight rhodium and about 50% by weight platinum is sufficient to achieve the ideal white color and luster of electrodeposited rhodium or at least approximately this white color and luster to achieve.
Überraschenderweise hat es sich gezeigt, dass die beschriebene Legierung sehr gut für einen Schmuckguss nach dem Wachsausschmelzverfahren geeignet ist, wobei übliche Anlagen und Einbettmassen für das Gießen von Platin-Legierungen verwendet werden können. Die aus der beschriebenen Legierung hergestellten Gusstelle haben kaum bis keine Porosität, die Härte beträgt 160 bis 170 HV, und Oberflächenfehler durch Reaktionen mit Einbettmasse wurde praktisch nicht beobachtet. Die unerwartet geringe Erstarrungsschrumpfung der beschriebenen Legierung im Vergleich zu anderen Schmuckwerkstoffen wie Platin 950 oder Weißgold 750 verhindert eine Schrumpfungsporosität, welches ein Hauptproblem beim Schmuckgießen darstellt. Ein weiterer Vorteil ist, dass Gas- und Einbettmassereaktionen fast ausgeschlossen sind, da sowohl Rhodium als auch Platin eine hohe chemische Beständigkeit aufweisen. Dies bedingt auch, dass ein Wiedervergießen von Resten der beschriebenen Edelmetall-Schmucklegierung ohne größere Schwierigkeiten durchführbar ist, da die beschriebene EdelmetallSchmucklegierung nicht durch chemische Reaktionen beeinträchtigt wird. Die mögliche Wiederverwendung von Resten des Gießprozesses führt daher zu einer optimalen Materialausnutzung. Ein weiterer Vorteil der beschriebenen Legierung besteht in Verbindung mit Schmuckgießen darin, dass durch Schmuckguss hergestellte Gussteile endabmessungsnahe Ausmaße besitzen, was in Verbindung mit einer guten Wiedervergießbarkeit einen sparsamen Materialeinsatz mit sich bringt.Surprisingly, it has been found that the described alloy is very well suited for investment casting by the lost wax process, whereby conventional equipment and investments can be used for the casting of platinum alloys. The castings made of the described alloy have little to no porosity, the hardness is 160 to 170 HV, and surface defects due to reactions with investment material were practically not observed. The unexpectedly low solidification shrinkage of the described alloy compared to other jewelry materials such as platinum 950 or white gold 750 prevents shrinkage porosity, which is a major problem in jewelery casting. Another advantage is that gas and embedding mass reactions are almost impossible since both rhodium and platinum have high chemical resistance. This also implies that remakes of remnants of the precious metal jewelery alloy described can be carried out without great difficulty, since the described precious metal jewelery alloy is not affected by chemical reactions. The possible reuse of remnants of the casting process therefore leads to optimal material utilization. A further advantage of the described alloy in connection with jewelery casting is that castings produced by jewelery have dimensions close to the final dimensions, which, in conjunction with good re-pourability, results in an economical use of material.
Ein aus der beschriebenen Legierung hergestellter Draht weist eine Härte im Bereich von 160 bis 170 HV im weichen und von 350 bis 370 HV im harten Zustand auf. Aus der beschriebenen Legierung lassen sich also einfache Halbzeuge herstellen, wobei eine gute Verformbarkeit durch eine Warmumformung erreicht werden kann.A wire made from the described alloy has a hardness in the range of 160 to 170 HV in the soft state and from 350 to 370 HV in the hard state. From the described alloy it is therefore possible to produce simple semi-finished products, wherein good deformability can be achieved by hot forming.
Der beschriebenen Edelmetall-Schmucklegierung kann noch Ruthenium, Iridium und/oder Gold in einem Gewichtsanteil bis zu 20 Gew.-% beigemischt werden, wobei Platin durch Ruthenium, Iridium und/oder Gold ersetzt wird, so dass sich die Anteile von Rhodium und Platin sowie die vorgenannten Beimischungen im wesentlichen zu 100 Gew.-% ergänzen.Ruthenium, iridium and / or gold can also be added to the precious metal jewelry alloy described in a proportion by weight of up to 20% by weight, with platinum being replaced by ruthenium, iridium and / or gold, so that the proportions of rhodium and platinum and the aforementioned admixtures add up to substantially 100 wt .-%.
Des weiteren kann noch vorgesehen sein, dass bis zu 50 % des Platins durch Palladium ersetzt ist, so dass die beschriebenen Edelmetall-Schmucklegierung dann bis zu 30 Gew.-% Palladium aufweist, wobei sich dann Gewichtsanteile von Rhodium, Platin und Palladium sich im wesentlichen zu 100 Gew.-% ergänzen. Diese Maßnahme hat einen positiven Einfluss auf den Materialpreis der Legierung, da Palladium wesentlich kostengünstiger ist als Platin.Furthermore, it can still be provided that up to 50% of the platinum is replaced by palladium, so that the described precious metal jewelery alloy then up to 30 wt .-% palladium, wherein then parts by weight of rhodium, platinum and palladium substantially to 100 wt .-% complete. This measure has a positive influence on the material price of the alloy, since palladium is much cheaper than platinum.
Zusammenfassend ist festzuhalten, dass sich die beschriebene Edelmetall-Schmucklegierung in besonders vorteilhafter Art und Weise zur Herstellung von ideal-weißen, anlaufbeständigen Schmuckstücken, wie Schmuck aller Art, von Juwelierartikeln, von Uhren, von Uhrengehäusen sowie von Schreibgeräten, um nur einige der bevorzugten Anwendungen aufzuzählen, eignet.In summary, it should be noted that the described precious metal jewelry alloy in a particularly advantageous manner for the production of ideal white, tarnish jewelery, such as jewelry of all kinds, jewelery, watches, watch cases and writing instruments, to name a few of the preferred applications enumerate, is suitable.
Claims (4)
- Article of jewellery like jewellery, a watch, a jeweller's item, a writing instrument, characterized in that the article of jewellery is made of an alloy which contains rhodium in an amount of 47 to 53 wt.-% and platinum in an amount of 43 to 47 wt.-%, and that the article of jewellery optionally contains ruthenium, iridium and/or gold in an amount of together up to 20 wt.-%, whereby in this case platinum is substituted by ruthenium, iridium and/or gold, and that the alloy furthermore preferably contains palladium in an amount of up to 30 wt.-%, whereby in this case platinum is substituted by said palladium, and that the weight amounts of rhodium, platinum and optionally ruthenium, iridium, gold and/or palladium, apart from usual impurities, complement to 100 wt.-%.
- Article of jewellery according to claim 1, characterized in that the alloy comprises rhodium in an amount of 48 to 52 wt.-% and platinum in an amount of 42 to 48 wit.-%, and that the alloy optionally comprises ruthenium, iridium and/or gold in an amount of together up to 20 wt.-%, whereby in this case platinum is substituted by rhodium, iridium and/or gold, and that the alloy furthermore optionally comprises palladium in an amount of up to 30 wt.-%, whereby in this case platinum is substituted by said palladium, and that the weight amounts of rhodium, platinum and optionally ruthenium, iridium and/or gold and/or palladium, apart from usual impurities, complement to 100 wt.-%.
- Article of jewellery according to one of the previous claims, characterized in that the alloy comprises 50 wt.-% rhodium and 50 wt.-% platinum, and that the alloy optionally comprises ruthenium, iridium and/or gold in an amount of together up to 30 wt.-%, whereby in this case platinum is substituted by said palladium, and that the weight amounts of rhodium, platinum and optionally ruthenium, iridium and/or gold and/or palladium, apart from usual impurities, complement to 100 wt.-%.
- Method for manufacturing an article of jewellery, like jewellery, a watch, a jeweller's article or a writing instrument, characterized in that the article of jewellery is made of an alloy, which contains rhodium in an amount of 47 to 53 wt.-% and platinum in an amount of 43 to 47 wt.-%, and that the article of jewellery optionally contains ruthenium, iridium and/or gold in an amount of collectively up to 20 wt.-%, whereby in this case platinum is substituted by ruthenium, iridium and/or gold, and that the alloy furthermore preferably contains palladium in an amount of together up to 30 wt.-%, whereby in this case platinum is substituted by said palladium, and that the weight amounts of rhodium, platinum and optionally ruthenium, iridium, gold and/or palladium, apart from usual impurities, complement to 100 wt.-%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16002040.0A EP3135781A1 (en) | 2010-07-12 | 2011-07-12 | Precious metal jewelry alloy |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201020010147 DE202010010147U1 (en) | 2010-07-12 | 2010-07-12 | Ideal white, tarnish-resistant precious metal jewelry alloy |
| DE201010026930 DE102010026930A1 (en) | 2010-07-12 | 2010-07-12 | Ideally white precious metal-jewelry alloy, useful for preparing clocks, jewelry or its articles and/or writing instruments, comprises specified amount of rhodium and platinum |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16002040.0A Division EP3135781A1 (en) | 2010-07-12 | 2011-07-12 | Precious metal jewelry alloy |
| EP16002040.0A Division-Into EP3135781A1 (en) | 2010-07-12 | 2011-07-12 | Precious metal jewelry alloy |
| EP15003227 Division-Into | 2015-11-12 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| EP2420583A2 EP2420583A2 (en) | 2012-02-22 |
| EP2420583A8 EP2420583A8 (en) | 2012-05-16 |
| EP2420583A3 EP2420583A3 (en) | 2012-07-04 |
| EP2420583B1 true EP2420583B1 (en) | 2016-11-02 |
Family
ID=44581927
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16002040.0A Withdrawn EP3135781A1 (en) | 2010-07-12 | 2011-07-12 | Precious metal jewelry alloy |
| EP11005688.4A Not-in-force EP2420583B1 (en) | 2010-07-12 | 2011-07-12 | Jewellery made from perfectly white, tarnish-proof noble metal alloy |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16002040.0A Withdrawn EP3135781A1 (en) | 2010-07-12 | 2011-07-12 | Precious metal jewelry alloy |
Country Status (1)
| Country | Link |
|---|---|
| EP (2) | EP3135781A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017508071A (en) | 2014-02-11 | 2017-03-23 | ツエー．ハフナー ゲーエムベーハー ウント ツエーオー．ケーゲーＣ．Ｈａｆｎｅｒ Ｇｍｂｍ ＋ Ｃｏ．Ｋｇ | Precious metal alloys used for jewelry and watchmaking |
| DE102014001718A1 (en) * | 2014-02-11 | 2015-08-13 | C. Hafner Gmbh + Co. Kg | Precious metal alloy, in particular for use in the jewelery and watch industry |
| EP3020835B1 (en) | 2014-11-17 | 2021-04-21 | Omega SA | Piece of watchmaking, bijouterie or jewelry comprising a component made of a palladium-based alloy |
| DE202015002358U1 (en) | 2015-03-30 | 2016-07-01 | C. Hafner Gmbh + Co. Kg | Precious metal alloy for use in the jewelry and watch industry |
| DE102015003996B4 (en) | 2015-03-30 | 2019-10-31 | C. Hafner Gmbh + Co. Kg | Precious metal alloy for use in the jewelry and watch industry |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1181922B (en) | 1962-02-03 | 1964-11-19 | Degussa | Use of a homogeneous platinum-rhodium alloy for spinnerets |
| US3451859A (en) | 1967-08-31 | 1969-06-24 | Engelhard Ind Inc | Noble metal thermocouple having base metal compensating leads |
| US3779728A (en) * | 1969-12-12 | 1973-12-18 | J Hansen | High temperature - high strength alloy glass fiber forming bushing |
| JPS60264330A (en) | 1984-06-08 | 1985-12-27 | Matsushita Electric Ind Co Ltd | Mold for press molding of optical glass element |
| US6982059B2 (en) * | 2001-10-01 | 2006-01-03 | General Electric Company | Rhodium, platinum, palladium alloy |
| US7244367B2 (en) | 2001-12-11 | 2007-07-17 | Jds Uniphase Corporation | Metal alloy elements in micromachined devices |
| US7740720B2 (en) * | 2005-09-07 | 2010-06-22 | Fogel Kenneth D | Platinum-palladium alloy |
| DE102008050135B4 (en) | 2008-10-04 | 2010-08-05 | Umicore Galvanotechnik Gmbh | Process for depositing platinum rhodium layers with improved brightness |
-
2011
- 2011-07-12 EP EP16002040.0A patent/EP3135781A1/en not_active Withdrawn
- 2011-07-12 EP EP11005688.4A patent/EP2420583B1/en not_active Not-in-force
Non-Patent Citations (3)
| Title |
|---|
| DRILENOK B S ET AL: "Interdiffusion in the platinum-rhodium system and heat resistance of alloys", CVETNYE METALLY (TSVETNYE METALLY), MOSKVA : GOS. OB'EDINNOE NAU PRG ANO-TECHNI PRG AESKOE IZDAT, no. 1, 1 January 1987 (1987-01-01), pages 83 - 84, XP009173942, ISSN: 0372-2929 * |
| MUELLER ET AL: "Bestimmung der Schmelzpunkte von Platinlegierungen = Determination of the Melting Points of Platinum Alloys", ANNALEN DER PHYSIK, BARTH, LEIPIG, DE, vol. 399, no. 1, 1 January 1930 (1930-01-01), pages 9 - 47, XP009173928, ISSN: 0003-3804 * |
| SPIEKERMANN P: "LEGIERUNGEN - EIN BESONDERES PATENTRECHTLICHES PROBLEM? - LEGIERUNGSPRUEFUNG IM EUROPAEISCHEN PATENTAMT -", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, HEYMANN, KOLN, DE, 1 January 1993 (1993-01-01), pages 178 - 190, XP000961882, ISSN: 0026-6884 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2420583A3 (en) | 2012-07-04 |
| EP2420583A8 (en) | 2012-05-16 |
| EP3135781A1 (en) | 2017-03-01 |
| EP2420583A2 (en) | 2012-02-22 |
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