JPH083662A - Gold-palladium series white gold alloy powder excellent in sinterability - Google Patents
Gold-palladium series white gold alloy powder excellent in sinterabilityInfo
- Publication number
- JPH083662A JPH083662A JP16061894A JP16061894A JPH083662A JP H083662 A JPH083662 A JP H083662A JP 16061894 A JP16061894 A JP 16061894A JP 16061894 A JP16061894 A JP 16061894A JP H083662 A JPH083662 A JP H083662A
- Authority
- JP
- Japan
- Prior art keywords
- gold alloy
- white gold
- alloy powder
- sinterability
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、焼結性に優れた白色
金合金粉末に関するものであり、特に、貴金属粘土を製
造するための焼結性に優れたＡｕ−Ｐｄ系白色金合金粉
末に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white gold alloy powder having an excellent sinterability, and more particularly to an Au-Pd type white gold alloy powder having an excellent sinterability for producing a precious metal clay. It is a thing.
【０００２】[0002]
【従来の技術】近年、貴金属粉末を含有した貴金属粘土
を成形して貴金属成形体を作製し、この貴金属成形体を
焼結して貴金属造形物を作製する方法が提案されてお
り、この貴金属粘土は、貴金属粉末：５０〜９０％、セ
ルローズ系水溶性バインダー：０．８〜８％、界面活性
剤：０．０３〜３％、油脂：０．１〜３％を含有し、残
りが水および不可避不純物からなる組成を有している
（特開平４−２６７０７号公報参照）。この貴金属粘土
に含まれる貴金属粉末の内でも白色金合金粉末を用い、
白色の貴金属造形物を作製することも行われている。こ
の白色金合金粉末としては、 Ｃｕ：２．２〜１２％、Ｎｉ：８〜１７％を含有し、さ
らに必要に応じてＺｎ：３〜５．５％を含有し、残りが
Ａｕおよび不可避不純物からなる組成を有するＡｕ−Ｎ
ｉ系白色金合金粉末、 Ｐｄ：５〜２５％を含有し、残りがＡｕおよび不可避不
純物からなる組成を有するＡｕ−Ｐｄ系白色金合金粉
末、 などが知られている。前記Ａｕ−Ｎｉ系白色金合金粉末
は、安価でありかつ低温で焼結することができるが、金
属アレルギーの問題があるので白色金合金粉末としてＡ
ｕ−Ｐｄ系白色金合金粉末を用いることが好ましいとさ
れている。2. Description of the Related Art In recent years, a method has been proposed in which a precious metal clay containing a precious metal powder is molded to produce a precious metal molded body, and the precious metal molded body is sintered to produce a precious metal molded article. Contains noble metal powder: 50 to 90%, cellulose-based water-soluble binder: 0.8 to 8%, surfactant: 0.03 to 3%, oil and fat: 0.1 to 3%, and the rest is water and It has a composition of inevitable impurities (see Japanese Patent Laid-Open No. 26707/1992). Among the precious metal powders contained in this precious metal clay, white gold alloy powder is used,
It is also practiced to produce a white precious metal model. The white gold alloy powder contains Cu: 2.2 to 12%, Ni: 8 to 17%, further contains Zn: 3 to 5.5% if necessary, and the rest Au and inevitable impurities. Au-N having a composition of
Known are i-type white gold alloy powders, Au-Pd-type white gold alloy powders containing Pd: 5 to 25% and the rest being Au and inevitable impurities. The Au-Ni-based white gold alloy powder is inexpensive and can be sintered at a low temperature, but since it has a metal allergy problem, it can be used as a white gold alloy powder.
It is said that it is preferable to use u-Pd type white gold alloy powder.
【０００３】[0003]
【発明が解決しようとする課題】ところが、このＡｕ−
Ｐｄ系白色金合金粉末は、融点が高く焼結性が悪いの
で、このＡｕ−Ｐｄ系白色金合金粉末を含む貴金属粘土
の焼結には比較的大きな出力の焼結炉を必要とし、また
焼結には長時間かかるため、比較的小さな出力の焼結炉
を用いて手軽に焼結できるという貴金属粘土のメリット
が失われるなどの課題があった。However, this Au-
Since the Pd-based white gold alloy powder has a high melting point and poor sinterability, sintering of the precious metal clay containing this Au-Pd-based white gold alloy powder requires a sintering furnace with a relatively large output, and the sintering is also difficult. Since the binding takes a long time, there was a problem that the advantage of precious metal clay, such as being able to easily sinter using a sintering furnace with a relatively small output, was lost.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者らは、
かかる観点から、焼結性に優れたＡｕ−Ｐｄ系白色金合
金粉末を得るべく研究を行った結果、 Ｐｄ：５〜２０％を含有するＡｕ−Ｐｄ系白色金合金
に、さらにＩｎ：５〜２０％を含有せしめたＡｕ−Ｐｄ
系白色金合金粉末、 Ｐｄ：５〜２２％を含有するＡｕ−Ｐｄ系白色金合金
に、さらに、Ｓｎ：３〜２０％を含有せめたＡｕ−Ｐｄ
系白色金合金粉末、 Ｐｄ：５〜１５％を含有するＡｕ−Ｐｄ系白色金合金
に、さらに、Ｂｉ：１０〜２０％を含有せしめたＡｕ−
Ｐｄ系白色金合金粉末、 は、従来のＡｕ−Ｐｄ系白色金合金に比べて融点が低下
し、したがって焼結性が格段に向上するという知見を得
たのである。Means for Solving the Problems Accordingly, the present inventors have:
From such a viewpoint, as a result of conducting research to obtain an Au-Pd-based white gold alloy powder having excellent sinterability, an Au-Pd-based white gold alloy containing Pd: 5 to 20% and further In: 5 to Au-Pd containing 20%
-Based white gold alloy powder, Au-Pd containing 5 to 22% of Pd, and Au-Pd containing Sn: 3 to 20%.
-Based white gold alloy powder, Au-Pd-based white gold alloy containing Pd: 5 to 15%, and Au: 10 to 20% Bi.
It was found that the Pd-based white gold alloy powder has a lower melting point than that of the conventional Au-Pd-based white gold alloy, and therefore the sinterability is remarkably improved.
【０００５】この発明は、かかる知見にもとづいてなさ
れたものであって、（１） 重量％で、Ｐｄ：５〜２０
％、Ｉｎ：５〜２０％を含有し、残りがＡｕおよび不可
避不純物からなる組成を有する焼結性に優れたＡｕ−Ｐ
ｄ系白色金合金粉末、（２） 重量％で、Ｐｄ：５〜２
２％、Ｓｎ：３〜２０％を含有し、残りがＡｕおよび不
可避不純物からなる組成を有する焼結性に優れたＡｕ−
Ｐｄ系白色金合金粉末、（３） 重量％で、Ｐｄ：５〜
１５％、Ｂｉ：１０〜２０％を含有し、残りがＡｕおよ
び不可避不純物からなる組成を有する焼結性に優れたＡ
ｕ−Ｐｄ系白色金合金粉末、に特徴を有するものであ
る。The present invention has been made on the basis of such findings, and (1) Pd: 5 to 20% by weight.
%, In: 5 to 20%, and the balance of Au and unavoidable impurities, and Au-P excellent in sinterability.
d-based white gold alloy powder, (2) wt%, Pd: 5-2
2%, Sn: 3 to 20%, and the balance of Au and inevitable impurities.
Pd-based white gold alloy powder, (3) wt%, Pd: 5
15%, Bi: 10 to 20%, with the balance being Au and inevitable impurities, and having excellent sinterability A
It is characterized by a u-Pd-based white gold alloy powder.
【０００６】この発明の焼結性に優れたＡｕ−Ｐｄ系白
色金合金粉末において、それぞれＩｎ：５％未満、Ｓ
ｎ：３％未満およびＢｉ：１０％未満では融点が高く、
したがって焼結性が悪いので好ましくなく、一方、それ
ぞれ、Ｉｎが２０％を越え、Ｓｎが２０％を越え、さら
にＢｉが２０％を越えて含有すると、得られた焼結体の
色調が黄色味を帯びて悪くなるので好ましくないことに
よるものである。この発明の焼結性に優れたＡｕ−Ｐｄ
系白色金合金粉末の一層好ましい成分組成範囲は、Ｉ
ｎ：５〜１５％、Ｓｎ：５〜１５％、Ｂｉ：１０〜１７
％である。In the Au--Pd type white gold alloy powder having excellent sinterability of the present invention, In: less than 5% and S, respectively.
If n: less than 3% and Bi: less than 10%, the melting point is high,
Therefore, it is not preferable because the sinterability is poor. On the other hand, when the content of In exceeds 20%, the content of Sn exceeds 20%, and the content of Bi exceeds 20%, the color tone of the obtained sintered body is yellowish. This is due to the fact that it is not desirable because it is tinged with and deteriorates. Au-Pd excellent in sinterability of the present invention
A more preferable composition range of the white gold alloy powder is I
n: 5 to 15%, Sn: 5 to 15%, Bi: 10 to 17
%.
【０００７】[0007]
実施例１ 通常の真空溶解炉により表１に示されるＩｎを含む成分
組成を有するＡｕ−Ｐｄ系白色金合金を溶解し、得られ
たＡｕ−Ｐｄ系白色金合金溶湯を通常の条件でガスアト
マイズすることによりいずれも平均粒径：５０μｍの本
発明白色金合金粉末１〜１０および比較白色金合金粉末
１〜２を作製した。これら白色金合金粉末：８０重量％
に対して、それぞれエチルセルローズ：２．０重量％、
界面活性剤：０．４重量％、フタル酸−ｎ−ジブチル：
０．７重量％、残りが水となるように配合し、混合して
貴金属粘土を作製し、これら貴金属粘土の成形体を８８
０℃で２時間保持の同一条件で焼結し、得られた焼結体
の密度比を測定し、その結果を表１に示した。Example 1 An Au-Pd-based white gold alloy having a composition of In shown in Table 1 was melted in a conventional vacuum melting furnace, and the obtained Au-Pd-based white gold alloy melt was gas atomized under normal conditions. As a result, white gold alloy powders 1 to 10 of the present invention and comparative white gold alloy powders 1 and 2 each having an average particle size of 50 μm were produced. These white gold alloy powders: 80% by weight
To ethyl cellulose: 2.0% by weight,
Surfactant: 0.4 wt%, phthalate-n-dibutyl:
0.7% by weight, blended so that the balance is water, and mixed to produce a noble metal clay.
Sintering was performed under the same conditions of holding at 0 ° C. for 2 hours, the density ratio of the obtained sintered body was measured, and the results are shown in Table 1.
【０００８】[0008]
【表１】 [Table 1]
【０００９】実施例２ 通常の真空溶解炉により表２に示されるＳｎを含む成分
組成を有するＡｕ−Ｐｄ系白色金合金を溶解し、得られ
たＡｕ−Ｐｄ系白色金合金溶湯を通常の条件でガスアト
マイズすることによりいずれも平均粒径：５０μｍの本
発明白色金合金粉末１１〜２０および比較白色金合金粉
末３〜４を作製した。これら白色金合金粉末：８０重量
％に対して、それぞれ、エチルセルローズ：２．０重量
％、界面活性剤：０．４重量％、フタル酸−ｎ−ジブチ
ル：０．７重量％、残りが水となるように配合し、混合
して貴金属粘土を作製し、これら貴金属粘土の成形体を
８８０℃で２時間保持の同一条件で焼結し、得られた焼
結体の密度比を測定し、その結果を表２に示した。Example 2 An Au-Pd-based white gold alloy having a composition containing Sn shown in Table 2 was melted in a conventional vacuum melting furnace, and the obtained Au-Pd-based white gold alloy melt was subjected to normal conditions. The present invention was used to produce the white gold alloy powders 11 to 20 of the present invention and the comparative white gold alloy powders 3 to 4 each having an average particle diameter of 50 μm. Each of these white gold alloy powders: 80% by weight, ethyl cellulose: 2.0% by weight, surfactant: 0.4% by weight, -n-dibutyl phthalate: 0.7% by weight, and the balance water. To prepare a precious metal clay, and to sinter the molded body of these precious metal clay under the same conditions of holding at 880 ° C. for 2 hours, and to measure the density ratio of the obtained sintered body, The results are shown in Table 2.
【００１０】[0010]
【表２】 [Table 2]
【００１１】実施例３ 通常の真空溶解炉により表３に示されるＳｎを含む成分
組成を有するＡｕ−Ｐｄ系白色金合金を溶解し、得られ
たＡｕ−Ｐｄ系白色金合金溶湯を通常の条件でガスアト
マイズすることによりいずれも平均粒径：５０μｍの本
発明白色金合金粉末２１〜３０および比較白色金合金粉
末５〜６を作製した。これら白色金合金粉末：８０重量
％に対して、それぞれ、エチルセルローズ：２．０重量
％、界面活性剤：０．４重量％、フタル酸−ｎ−ジブチ
ル：０．７重量％、残りが水となるように配合し、混合
して貴金属粘土を作製し、これら貴金属粘土の成形体を
８８０℃で２時間保持の同一条件で焼結し、得られた焼
結体の密度比を測定し、その結果を表３に示した。Example 3 An Au-Pd-based white gold alloy having a composition containing Sn shown in Table 3 was melted in a normal vacuum melting furnace, and the obtained Au-Pd-based white gold alloy melt was subjected to normal conditions. The present invention produced white gold alloy powders 21 to 30 and comparative white gold alloy powders 5 to 6 each having an average particle diameter of 50 μm. Each of these white gold alloy powders: 80% by weight, ethyl cellulose: 2.0% by weight, surfactant: 0.4% by weight, -n-dibutyl phthalate: 0.7% by weight, and the balance water. To prepare a precious metal clay, and to sinter the molded body of these precious metal clay under the same conditions of holding at 880 ° C. for 2 hours, and to measure the density ratio of the obtained sintered body, The results are shown in Table 3.
【００１２】従来例１ 通常の真空溶解炉によりＰｄ：２０重量％を含有し、残
りがＡｕおよび不可避不純物からなる組成のＡｕ−Ｐｄ
系白色金合金を溶解し、得られたＡｕ−Ｐｄ系白色金合
金溶湯を通常の条件でガスアトマイズすることによりい
ずれも平均粒径：５０μｍの従来白色金合金粉末を作製
し、この白色金合金粉末：８０重量％に対して、それぞ
れ、エチルセルローズ：２．０重量％、界面活性剤：
０．４重量％、フタル酸−ｎ−ジブチル：０．７重量
％、残りが水となるように配合し、混合して貴金属粘土
を作製し、これら貴金属粘土の成形体を８８０℃で２時
間保持の同一条件で焼結し、得られた焼結体の密度比を
測定し、その結果を表３に示した。Conventional Example 1 Au-Pd having a composition containing 20% by weight of Pd in the usual vacuum melting furnace and the balance of Au and inevitable impurities.
The conventional white gold alloy powder having an average particle diameter of 50 μm was produced by melting the obtained white gold alloy and subjecting the obtained molten Au-Pd system white gold alloy to gas atomization under normal conditions. : 80% by weight, respectively, ethyl cellulose: 2.0% by weight, surfactant:
0.4% by weight, -n-dibutyl phthalate: 0.7% by weight, blended so that the balance is water and mixed to prepare a noble metal clay, and a molded body of these noble metal clays is heated at 880 ° C. for 2 hours. Sintering was carried out under the same conditions of holding, the density ratio of the obtained sintered body was measured, and the results are shown in Table 3.
【００１３】[0013]
【表３】 [Table 3]
【００１４】表１〜表３に示される結果から、前記８８
０℃に２時間保持の条件で焼結した本発明白色金合金粉
末１〜３０の焼結体の密度比はいずれも７０％以上であ
るところから完全に焼結されているが、同じ８８０℃に
２時間保持の条件で焼結した従来白色金合金粉末の焼結
体の密度比は５３％であるところから本発明白色金合金
粉末１〜３０は従来白色金合金粉末に比べて格段に優れ
た焼結性を示すことが分かる。しかし比較白色金合金粉
末１〜６に見られるように、Ｉｎ、ＳｎおよびＢｉが不
足すると焼結性が劣り、一方、Ｉｎ、ＳｎおよびＢｉが
多すぎると焼結体が黄色に着色し、好ましくないことも
わかる。From the results shown in Tables 1 to 3, the above 88
The density ratio of the sintered bodies of the white gold alloy powders 1 to 30 of the present invention which were sintered at 0 ° C. for 2 hours was 70% or more, but they were completely sintered, but the same 880 ° C. Since the density ratio of the sintered body of the conventional white gold alloy powder sintered under the condition of holding for 2 hours is 53%, the white gold alloy powders 1 to 30 of the present invention are significantly superior to the conventional white gold alloy powder. It can be seen that it exhibits excellent sinterability. However, as seen in Comparative White Gold Alloy Powders 1 to 6, when In, Sn and Bi are insufficient, the sinterability is poor, while when In, Sn and Bi are too much, the sintered body is colored yellow, which is preferable. I also know that it is not.
【００１５】[0015]
【発明の効果】上述のように、この発明の白色金合金粉
末は、従来よりも焼結性に優れているため、手軽に装飾
品などを提供することができ、装飾産業上優れた効果を
もたらすものである。As described above, since the white gold alloy powder of the present invention is superior in sinterability to the conventional one, it is possible to easily provide ornaments and the like, and to exert an excellent effect in the ornament industry. To bring.
Claims (3)
〜２０％を含有し、残りがＡｕおよび不可避不純物から
なる組成を有することを特徴とする焼結性に優れたＡｕ
−Ｐｄ系白色金合金粉末。1. Pd: 5 to 20%, In: 5 by weight%.
Au having excellent sinterability, characterized in that it has a composition of ˜20% and the rest is Au and unavoidable impurities.
-Pd-based white gold alloy powder.
〜２０％を含有し、残りがＡｕおよび不可避不純物から
なる組成を有することを特徴とする焼結性に優れたＡｕ
−Ｐｄ系白色金合金粉末。2. Pd: 5 to 22%, Sn: 3 by weight.
Au having excellent sinterability, characterized in that it has a composition of ˜20% and the rest is Au and unavoidable impurities.
-Pd-based white gold alloy powder.
０〜２０％を含有し、残りがＡｕおよび不可避不純物か
らなる組成を有することを特徴とする焼結性に優れたＡ
ｕ−Ｐｄ系白色金合金粉末。3. Pd: 5 to 15%, Bi: 1 by weight.
A having excellent sinterability, which is characterized by containing 0 to 20% and the balance being Au and inevitable impurities.
u-Pd type white gold alloy powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16061894A JPH083662A (en) | 1994-06-20 | 1994-06-20 | Gold-palladium series white gold alloy powder excellent in sinterability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16061894A JPH083662A (en) | 1994-06-20 | 1994-06-20 | Gold-palladium series white gold alloy powder excellent in sinterability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH083662A true JPH083662A (en) | 1996-01-09 |
Family
ID=15718834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16061894A Withdrawn JPH083662A (en) | 1994-06-20 | 1994-06-20 | Gold-palladium series white gold alloy powder excellent in sinterability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083662A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358024A (en) * | 2000-01-07 | 2001-07-11 | Argen Corp | Gold alloy for firing on porcelain |
| WO2010127458A1 (en) * | 2009-05-06 | 2010-11-11 | Rolex S.A. | White gold alloy free of nickel and copper |
-
1994
- 1994-06-20 JP JP16061894A patent/JPH083662A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358024A (en) * | 2000-01-07 | 2001-07-11 | Argen Corp | Gold alloy for firing on porcelain |
| WO2010127458A1 (en) * | 2009-05-06 | 2010-11-11 | Rolex S.A. | White gold alloy free of nickel and copper |
| EP2251444A1 (en) * | 2009-05-06 | 2010-11-17 | Rolex Sa | Grey gold alloy with no nickel and no copper |
| EP2450461A1 (en) | 2009-05-06 | 2012-05-09 | Rolex S.A. | Grey gold alloy with no nickel and no copper |
| EP2450460A1 (en) | 2009-05-06 | 2012-05-09 | Rolex S.A. | Grey gold alloy with no nickel and no copper |
| US9650697B2 (en) | 2009-05-06 | 2017-05-16 | Rolex Sa | Gray gold alloy free of nickel and copper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010904 |