WO2010062145A2

WO2010062145A2 - Precious-metal alloy for personal ornaments, and a personal ornament produced therefrom

Info

Publication number: WO2010062145A2
Application number: PCT/KR2009/007060
Authority: WO
Inventors: 시미즈코이치
Original assignee: 정용승
Priority date: 2008-11-28
Filing date: 2009-11-27
Publication date: 2010-06-03
Also published as: WO2010062145A3

Abstract

The present invention relates to a precious-metal alloy for personal ornaments. More specifically, the present invention provides an alloy having a decorative function and a health-promoting or therapeutic and healing function, which is a precious-metal alloy for personal ornaments allowing outstanding ease of production and ease of processing when it is processed into a personal ornament or the like. The present invention also provides a personal ornament produced from the precious-metal alloy for personal ornaments. The precious-metal alloy for personal ornaments of the present invention contains at least one type of precious metal selected from the group comprising gold, silver and platinum, and further comprises germanium, bismuth and indium therewith. The present invention is advantageous in that the effect of the action of the germanium can be further increased by further adding the bismuth to the alloy, personal ornaments produced therefrom have a good sheen even without plating with rhodium or the like and are also effective in promoting health and have a therapeutic and healing effect in various medical conditions and additionally can be used safely as they are outstandingly resistant to oxidation and other forms of corrosion at the same time as having the decorative function, and the alloy and the personal ornament can be produced at low cost.

Description

Precious metal alloys for jewelry and jewelry produced therefrom

TECHNICAL FIELD The present invention relates to a noble metal alloy for jewelry and jewelry produced therefrom. More specifically, the noble metal alloy for jewelry has a decorative function, expresses a therapeutic and healing effect, is easy to manufacture an alloy, and has good processability. And ornaments produced therefrom.

Precious metal alloys, which consist mainly of precious metals such as gold, silver and platinum, should have a beautiful appearance and, furthermore, should be safe metals for the human body, such as necklaces, rings, through earrings, jewelry, ornaments, precious metals, tableware. It is widely used in the present invention (hereinafter referred to as "trinkets"). Various kinds of substances may be added to the precious metal alloy for producing such ornaments in order to increase hardness and surface strength.

In recent years, germanium has also been added to jewelry alloys for the purpose of health promotion, treatment and healing of various diseases such as stiff shoulders. Here, germanium has a property that electricity flows even at a low temperature such as body temperature, and when in contact with the body, it is known to balance the biocurrent flowing in the body, activate immunity, increase natural healing ability, and alleviate menstrual irregularities. Germanium-added jewelry alloys are manufactured to take advantage of the so-called far-infrared effect provided by germanium. For example, Japanese Patent Laid-Open No. Hei 6-171675 discloses 0.5 to 3.0% germanium in an alloy for jewelry made of silver. The added silver alloy for jewelry is disclosed.

Furthermore, germanium and indium may be added to such a noble metal alloy, and when a noble metal is mixed with foreign particles of a larger particle than a noble metal, such as germanium, pinholes (cavities) are easily formed in the alloy, and malleable or ductile. In this case, there is a problem that the workability deteriorates when processing with jewelry, and in this case, by adding an appropriate amount of indium, it is possible to improve the malleability and ductility degraded by the addition of germanium, and to easily manufacture the alloy. Or to improve workability. Japanese Patent Application Laid-Open No. 2001-192753 discloses a noble metal alloy containing germanium and indium, and a silver alloy for ornaments containing 0.5 to 9.0% germanium and 1.0 to 9.0% indium, the residue being made of silver. .

However, it is preferable to add an appropriate amount of germanium to the noble metal alloy or jewelry made from such an alloy in order to exert the far-infrared effect as above, but when adding a large amount of germanium, it becomes difficult to manufacture the alloy as described above, or When the alloy is processed into ornaments deteriorate workability, this problem has a problem that is not obviously improved even when adding more indium.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an alloy for jewelry having a decorative function and health promotion or a treatment / healing function of various diseases.

Further, another object of the present invention is to provide a noble metal alloy for jewelry, which is easy to manufacture an alloy, and has good workability when processed into jewelry and the like and jewelry produced therefrom.

In order to achieve the above object, the present invention is a noble metal alloy for jewelry containing at least one precious metal selected from the group consisting of gold, silver, and platinum, precious metal for jewelry further containing germanium, bismuth, and indium Provide an alloy.

Here, it is preferable that the germanium is 0.01 to 5.0 mass%, the bismuth is 0.01 to 3.0 mass%, and the indium is 0.1 to 30.0 mass% with respect to the whole alloy.

In addition, the germanium, the bismuth, and the indium may have a total mass% of 0.3 to 10.0 mass% relative to the mass% of the entire alloy.

In addition, the content ratio of the germanium and bismuth is preferably germanium: bismuth 5: 2: 1 to 1.

The present invention also provides an ornament made of a noble metal alloy for jewelry to be worn in contact with the skin of the noble metal alloy for jewelry as described above.

The precious metal alloy for jewelry according to the present invention contains at least one precious metal selected from gold, silver, and platinum, and further contains germanium, bismuth, and indium, thereby doubling the effect of exerting germanium by bismuth. For example, two substances can complement each other to generate synergistic effects.

In addition, the noble metal alloy according to the present invention is beneficial to health by having, for example, a far infrared ray effect or a thermal effect (the effect of causing the noble metal to stimulate the contact portion by the heat radiating function) as a stimulating effect due to heat, and the shoulder. It is effective in treating and healing various diseases such as stiffness.

In addition, the noble metal alloy of the present invention is made of germanium and bismuth as its constituents, so that the glossiness is greatly improved. Therefore, even if plating is not performed, such as rhodium plating, the glossiness is good and the decorative function is excellent.

In addition, the precious metal alloy of the present invention contains a component of particles larger than the precious metal such as germanium and bismuth, and in addition, because it contains indium, it has good malleability and ductility, and improves workability as jewelry, and also jewelry Appropriate hardness to be provided can be given.

In addition, since the noble metal alloy for jewelry of the present invention contains germanium, bismuth and indium, there is an effect of improving corrosion resistance such as oxidation resistance.

In addition, the components added as described above are safe components and inexpensive materials even when used in contact with the skin, it is possible to manufacture a safe precious metal alloy for jewelry at low cost.

In addition, since the precious metal alloy for jewelry according to claim 2 of the present invention contains an appropriate amount of germanium, bismuth and indium with respect to the entire precious metal alloy, it is possible to efficiently express the effects as described above.

In addition, since the noble metal alloy for jewelry according to claim 3 of the present invention is made to contain an appropriate amount of the total amount of germanium, bismuth and indium with respect to the entire noble metal alloy, the effect as described above is achieved by the balance of these three components. Greater expression can be achieved.

In addition, in the noble metal alloy for jewelry according to claim 4 of the present invention, since the ratio of germanium content and bismuth content is within an appropriate range, an appropriate amount of bismuth corresponding to germanium is added so that bismuth effectively acts on germanium. Various effects of germanium can be efficiently expressed.

In addition, the jewelry according to claim 5 of the present invention is safe because, when worn, the part in contact with the skin is made of the precious metal alloy for jewelry of the present invention, and promotes health due to far-infrared and thermal effects or various diseases. Of course, the treatment and healing function can of course be further provided with a decorative function. In addition, it is excellent in corrosion resistance such as oxidation resistance, and can be manufactured at low cost. In addition, by wearing it can increase concentration, bring about a sense of security, and thus can suppress and relieve mental and psychological stress.

1 is a front view showing one kind of wire rod made of the noble metal alloy for jewelry of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a front view showing one kind of plate made of a precious metal alloy for jewelry of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a front view showing an adhesive core which is a kind of ornament of the present invention.

6 is a cross-sectional view taken along the line A-A of FIG.

Fig. 7 is a front view showing the state where the clasp of the necklace, which is a kind of jewelry of the present invention, is opened.

FIG. 8 is a cross-sectional view taken along line A-A of the fastener of FIG. 7. FIG.

9 is a TG / DTA chart of the precious metal alloy (silver alloy) for jewelry prepared from Example 2 of the present invention.

10 is a partially enlarged view of FIG. 9.

Explanation of symbols on the main parts of the drawings

1: Wire Rod 1a: Plate

1b: Adhesive core 1c: Necklace clasp

1d: wear mouth 11: first material

12: second ash

The precious metal alloy for jewelry of the present invention (hereinafter referred to as "noble metal alloy") contains at least one precious metal selected from the group consisting of gold (Au), silver (Ag), and platinum (Pt), and includes germanium, It is composed by further adding bismuth and indium.

The precious metal alloy of the present invention has a precious metal such as gold, silver, and platinum as a main component, and if necessary, adds other metals as necessary, and has a basic configuration of the precious metal component made of the alloy, for example, further adds another metal to gold. In this case, such other metals are defined as "half payment" or "half". In the precious metal alloy of the present invention, for example, when gold is added as a main component as a precious metal, various effects can be expressed. .

The content of the precious metal constituting the precious metal alloy is appropriately set so as to be the desired precious metal alloy, and in order to improve the strength of such precious metal, other metals may be appropriately added to the above precious metal as necessary.

In the case of allotment, silver (Ag) or copper (Cu) is used for gold, and pure gold and allotment are used to obtain the desired gold alloy. In K5 (5 gold), 21% of the total alloy is gold, 79% is silver and / or copper. In K8 (8 gold), 33% is gold, 67% is silver and / or copper. In (10 k gold), 42% of the total is gold, 58% is silver and / or copper, and in K14 (14 gold), 58% of the total is gold, 42% is silver and / or copper, and K18 (18 Gold) is composed of 100% gold if 75% of the total is gold, 25% is silver and / or copper, and K24 (24 gold). In the case of platinum (white gold), nickel (Ni) or palladium (Pd) is used as the sintering.

For silver, brass and / or copper (Cu) are used as "hal". For silver, 50% silver for silver 500, 80% silver for silver 800, 90% silver for silver 900, silver 925 If silver is 93% (92.5%) and silver 950, silver is 95%, and the residual metal is brass and / or copper. In addition, silver 1000 is 100% silver.

For platinum, palladium is used as "hal". As for platinum, Pt 500 is 50% platinum, Pt 800 is platinum 80%, Pt 900 is platinum 90%, Pt 925 is 93% (92.5), Pt 950 is 95% platinum, and the balance is 95%. The metal is palladium. In addition, Pt1000 is 100% platinum.

In addition, copper (Cu) is added to the gold, silver, and platinum as necessary, as necessary, and contains as much as desired for the precious metal.

The precious metal alloy of the present invention is a structure in which a part of "hal" is added with germanium, bismuth, and indium. For example, in the case of K18 (18 gold), gold is 75%, and the balance (25%) is "halal". Becomes In the present invention, when noble metals such as gold, silver, and platinum are made 50% or more of the total mass of the alloy, the effects of the present invention can be efficiently exhibited.

In the present invention, germanium (Ge), bismuth (Bi), and indium (In) are added to the entire noble metal alloy. Here, germanium functions to convert electricity into heat. The jewelry produced using the alloy can act to have a so-called far-infrared effect or a warming effect, and can exert an effect of promoting health by treating, for example, shoulder stiffness. In addition, by adding germanium, the alloy or the ornaments produced using the same may have glossiness, thereby improving the decorative function.

In addition, alloys prepared by adding germanium or jewelry manufactured using the alloys have corrosion resistance such as oxidation resistance and sulfidation resistance. In addition, by adding germanium, an appropriate hardness can be imparted to the alloy, and the workability is improved by the improvement of such hardness. In addition, germanium is a safe and inexpensive material that is safe to contact and use on the skin, thereby reducing the manufacturing cost.

It is preferable that the addition amount of germanium is 0.01-5.0 mass% with respect to the whole alloy. Such addition amount has a critical significance for efficiently expressing the effects of the present invention. If the added amount of germanium is less than 0.01% by mass, the effect of adding germanium is not exhibited. If the added amount of germanium is larger than 5.0% by mass, the addition of indium described later does not improve the malleability and ductility, and when processing with jewelry The workability may also deteriorate. The amount of such germanium added is more preferably 0.01 to 0.56% by mass relative to the entire alloy.

On the other hand, bismuth acts to convert heat into electricity, and the addition of bismuth is effected by the above-mentioned germanium, such as germanium, to impart health promotion and therapeutic effects to the alloy to which it is added or to jewelry made using the alloy. The effect equivalent to the expressed effect is given to the noble metal alloy. Moreover, by using germanium and bismuth together, the effect of this invention can also be remarkably expressed by synergism. That is, similarly to germanium, bismuth can also improve the health promotion effect and treatment effect by the above-described far-infrared or thermal effect, and in addition, it is possible to maximize the decorative function, to improve the corrosion resistance and hardness. In addition, bismuth, like germanium, is safe to use in contact with the skin, prevents contamination easily, and prevents foreign substances such as dust from sticking. In addition, since germanium is an inexpensive material, the manufacturing cost is reduced. In addition, if bismuth is not added, it is preferable to add bismuth because the low melting point of indium is depleted in the molten state, and thus the cavity is easily formed.

It is preferable that the addition amount of bismuth is 0.01-3.0 mass% with respect to the whole alloy. The added amount may correspond to an appropriate amount relative to the germanium content to cause synergism with germanium, thereby efficiently expressing various effects of germanium, and thus, the gas mass% has a critical significance in the above range. If the amount of bismuth is less than 0.01% by mass, there is no effect of adding bismuth, and if the amount of bismuth is more than 3.0% by mass, it is not balanced with germanium, and even though indium is added, workability may not be improved. More preferably, the addition amount of bismuth is 0.01 to 0.2% by mass relative to the total weight of the alloy.

It is preferable to make germanium and bismuth the weight ratio into germanium: bismuth = 5: 2-1: 1. If the ratio of germanium to bismuth is set in the above range, the amount of bismuth to germanium is appropriate, so that bismuth can effectively work on germanium. More preferably, germanium: bismuth = 2: 1 to 1: 1 is preferable.

In addition, when indium (In) is added to the alloy, it is possible to improve workability when preparing jewelry. That is, the alloy tends to be softened by the addition of germanium and bismuth, but when an appropriate amount of indium is further added thereto, the indium "binds" the precious metal having a small particle diameter with germanium and bismuth having a large particle diameter. It serves to harden the alloy, to improve the malleability and ductility, to improve the workability in the production of jewelry, and to impart the appropriate hardness. In addition, like germanium, the addition of indium can improve oxidation resistance, sulfidation resistance, and other corrosion resistance. In addition, by adding indium, the white color of the white alloy (silver, platinum) can be made clearer, and since indium is a safe and inexpensive material for contacting and using the skin, jewelry can be manufactured at low cost.

The amount of indium added is preferably 0.1 to 30.0% by mass relative to the total weight of the alloy, in order to express the effects of the present invention effectively, the above range has a critical meaning. If the added amount of indium is less than 0.1% by mass, the effect of adding indium is not exhibited. If the added amount of indium is larger than 30.0% by mass, the malleability or ductility becomes larger than necessary, and thus the hardness required as the jewelry cannot be maintained.

More preferably, the addition amount of indium is 0.1-10.0 mass% with respect to the total weight of an alloy, More preferably, it is good to set it as 0.1-9.0 mass%.

As can be seen from the above, germanium, bismuth, and indium, the three components are organically bonded to each other to form a feature of the present invention, the precious metal alloy of the present invention can effectively achieve the purpose.

Germanium, bismuth and indium are preferably added in an amount of 0.12 to 38.0 mass% based on the total weight of the alloy, more preferably 0.3 to 10.0 mass%. The above range has a critical significance as the amount of germanium, bismuth and indium in the balance for the alloy, and can more effectively express the effects of the present invention. When the total amount added is less than 0.3% by mass, various effects according to each component are not expressed, and when the total amount added is larger than 10.0% by mass, peeling of the metal molecules easily occurs, manufacturing is not easy, and workability is improved. There is no possibility.

In addition, it is preferable that ratio of the sum total of content of germanium and bismuth and content of indium is germanium + bismuth): indium = 1: 20-1: 5, and germanium, bismuth, and indium mutually exist in this range. By balancing, the amount of indium with respect to germanium and bismuth is made a suitable amount, and the manufacturing performance of an alloy and the processability to jewelry are improved. More preferably, the ratio of the sum of the contents of germanium and bismuth to the content of indium is (germanium + bismuth): indium = 1:15 to 1: 5.

The addition amounts of germanium, bismuth and indium to the precious metals (gold, silver, platinum) selected in the present invention are summarized as in Tables 1 to 3 below.

Table 1

(Types of Precious Metals: Gold)

	Content (mass%)
	gold	silver	indium	Bismuth	germanium
K18WG	75.0	0.1-24.9	0.1-24.9	0.01 ~ 3.0	0.01 ~ 5.0
K14WG	58.0	9.0-46.9	0.1-30.0	0.01 ~ 3.0	0.01 ~ 5.0
K10WG	42.0	20.0 ~ 57.9	0.1-30.0	0.01 ~ 3.0	0.01 ~ 5.0
K8WG	33.0	29.0-66.9	0.1-30.0	0.01 ~ 3.0	0.01 ~ 5.0
K5WG	21.0	41.0 ~ 78.9	0.1-30.0	0.01 ~ 3.0	0.01 ~ 5.0
K5WG	21.0	0.1-77.9 *	0.1-30.0	0.01 ~ 3.0	0.01 ~ 5.0

TABLE 2

(Types of Precious Metals: Silver)

	Content (mass%)
	silver	indium	Bismuth	germanium
SV950	95.0 to 99.9	0.1 ~ 5.0	0.01 ~ 3.0	0.01-4.9
SV925	92.5 ~ 94.9	0.1-7.5	0.01 ~ 3.0	0.01 ~ 5.0
SV900	90.0 ~ 92.4	0.1-10.0	0.01 ~ 3.0	0.01 ~ 5.0

TABLE 3

(Types of Precious Metals: Platinum)

	Content (mass%)
	platinum	silver	indium	Bismuth	germanium
Pt950	95.0	0.1-4.8	0.1-4.8	0.01 ~ 3.0	0.01 ~ 4.8
Pt900	90.0	0.1-9.9	0.1-9.9	0.01 ~ 3.0	0.01 ~ 5.0
Pt850	85.0	0.1-14.9	0.1-14.9	0.01 ~ 3.0	0.01 ~ 5.0
Pt800	80.0	0.1-19.9	0.1-19.9	0.01 ~ 3.0	0.01 ~ 5.0

In preparing the noble metal alloy of the present invention, a conventional manufacturing method may be used. For example, after mixing the components used in the present invention and dissolving them in the temperature range of 950 ~ 1100 ℃, now using the mold (I) precious metals such as gold, which have not been commercialized). In addition, after dissolving the thus obtained at a temperature range of 950 ~ 1100 ℃ again, it is cooled by water to form alloy granules of 1.0 ~ 1.5mm in diameter, and the alloy granules are dissolved again to achieve a homogeneous component. Can be.

Since the noble metal alloy of the above-mentioned structure contains an appropriate amount of germanium and bismuth, the interaction between germanium and bismuth expresses the far-infrared effect, the warming effect, and the like, thereby improving the health and the effect of stiff shoulders. Can be imported. In addition, by adding germanium and bismuth, even if plating is not performed, such as rhodium plating, glossiness is good and therefore, the ornament which is excellent in a decorative function can be manufactured.

In addition, the noble metal alloy of the present invention maintains good malleability and ductility by an appropriate amount of indium added even when it contains particles larger than noble metal components such as germanium and bismuth, and improves the workability to jewelry, and also as an accessory It is possible to maintain a moderate hardness.

Furthermore, by adding germanium, bismuth and indium to the noble metal, corrosion resistance such as oxidation resistance can be improved. In addition, since these components are safe and inexpensive to be brought into contact with the skin as jewelry, jewelry can be produced at low cost.

The effect of the precious metal alloy according to the present invention is summarized as follows for each precious metal component. That is, gold is used as a precious metal, and in the same way as conventional platinum using copper (Cu), rhodium plating has to be performed in order to produce a product because the current color is yellow and its gloss is inferior. Some palladium has been used as a shunt, but as palladium described below, palladium is used as a slump, and now the price is soared due to the price increase and there is little marketability.

In addition, nickel plating, which has excellent wear resistance in connection with plating, has been mainly used for plating precious metals. However, since nickel causes metal allergy to the skin, rhodium plating is the mainstream as described above. However, rhodium plating suffers from abrasion resistance and is easily peeled off, resulting in a problem in which the original color of the noble metal is revealed. Further, as described below, even when silver or platinum is used as the precious metal, the plating is immediately peeled off, so that the portion is oxidized or sulfided. There is a problem.

Therefore, the precious metal alloy of the present invention can be processed to white itself by using germanium, bismuth and indium as a substitute for copper, and the gloss is good, the hardness is strengthened, and the surface is rhodium plated. There is no need. Therefore, during post-processing, such as adjustment of the ring size or repair due to breakage, the plating can be processed except for this, and it is not necessary to perform plating again (particularly, for example, ring ring), thereby providing precious metals at low cost.

In addition, since silver as a noble metal has conventionally used copper as halide, similarly to white gold, discoloration tends to occur now, and as described above, a problem may occur in rhodium plating. However, the noble metal alloy of the present invention uses halo in combination of germanium, bismuth, and indium instead of copper, which is now excellent in corrosion resistance, such as oxidation resistance, and in addition, has a moderate hardness. In addition, when repairing for size correction in the processing of conventional silver products (stone ring, etc.), it is difficult to process it without heating the whole and keeping it constant. In addition, if the temperature rises too high at the time of heating, since it melts itself now, the current size correction by post-processing, etc. is avoided as much as possible, and thus there is a problem that inventory by size.

On the other hand, the precious metal alloy of the present invention has a low melting point, it is possible to correct the size by partial heating without removing the integrated jewelry, and it is possible to facilitate the processing because there is no need to consider the plating during post-processing (particularly, stone ring And the like). As a result, the precious metal alloy of the present invention can be manufactured and repaired at low cost.

In addition, platinum as a precious metal is rarely used as a constituent material for jewelry due to a sharp increase in the current price, and platinum is softer than gold (for example, K18). This somewhat black color and gloss is inferior, so rhodium plating should be applied to the surface at the product stage. On the other hand, since the noble metal alloy of the present invention uses germanium, bismuth, and indium together with halo, plating is not necessary because the glossiness is good and the hardness is appropriate, and the surface treatment is easy. In addition, for example, by reducing the content of platinum and increasing the content of germanium, bismuth and indium, the market can be expanded by lowering the manufacturing cost.

As mentioned above, since the noble metal alloy for jewelry of this invention does not need rhodium plating etc., an alloy material of low cost can be provided. In addition, as the form of the alloy, not only one kind but also two or more kinds of composites may be used. Figure 1 is a front view showing an embodiment of a linear ornament (wire, 1) made of a precious metal alloy for jewelry of the present invention, Figure 2 is a cross-sectional view A-A of FIG. 3 is a front view showing one kind of plate-shaped jewelry (plate material 1a) made of the noble metal alloy for jewelry of the present invention, and FIG. 4 is a sectional view taken along the line A-A of FIG.

The first material 11 constituting the wire rod 1 or the plate 1a may be, for example, an SV925 alloy, and the second material 12 may be, for example, a KW10WG alloy or the like (hereinafter, FIG. 5). The same applies to Figure 8).

Examples of the precious metal alloy of the present invention include necklaces, bracelets, rings, watch cases, watch bands, cut rings, machine chains, tableware (spoons, forks, etc.), eyeglass frames, dental metals, and health contact wicks. When used as a jewelry constituent material, it is possible to maximize the effect of the precious metal alloy of the present invention as described above. In other words, it is possible to manufacture jewelry having health promotion or treatment / healing function and decoration function, excellent corrosion resistance such as oxidation resistance, and safe and low manufacturing cost. Here, the production of the jewelry is not particularly limited, but may be cast into a desired shape by casting a precious metal alloy in the molten state, or heating the precious metal alloy.

By wearing the jewelry made of the noble metal alloy for jewelry of the present invention can increase the concentration of the α wave or the brain wave θ wave of the cerebral frontal lobe can increase the concentration, runner's high (runner's high) It can have the effect of causing. In addition, it reduces the activity of amylase, an enzyme of saliva, to relieve sympathetic nervous tension, thus reducing and suppressing mental and psychological stress.

In addition, the jewelry may be a precious metal alloy material for the jewelry of the present invention only in a part of contact with the skin, or the jewelry may be the precious metal alloy material for the jewelry of the present invention. There is also a method of plating a part such as an outer surface in contact with the skin with the precious metal alloy for jewelry of the present invention.

5 to 8 show a state in which two kinds of precious metal alloys are applied to the jewelry using the precious metal alloy for jewelry of the present invention. FIG. 5 is a front view showing an adhesive core 1b, which is one kind of jewelry of the present invention, and FIG. 6 is a sectional view taken along the line A-A of FIG. Fig. 7 is a front view showing the clasp 1c of the necklace, which is one kind of jewelry of the present invention, which at least constitutes the wearing tool 1d. FIG. 8 is an A-A cross-sectional view of the wearing port 1d in the clamp 1c of FIG.

When the noble metal alloy for jewelry of the present invention is used, jewelry (adhesive core 1b, necklace clasp 1c, and wearing tool) using two kinds of noble metal alloys (first material 11, second material 12) Also for 1d)), jewelry can be produced at low cost without the need for rhodium plating or the like.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not to be construed as being limited to such Examples.

Example 1 Preparation of Precious Metal Alloy for Jewelry (1)

The precious metal alloy for jewelry of the present invention was prepared by the following method.

The components of the composition shown in Table 4 were uniformly mixed, dissolved at about 990 ° C., then poured into a mold and cooled to prepare a now. The present invention is dissolved again to about 990 ℃, and then formed by water cooling or the like to form an alloy grain of 1.0 ~ 1.5mm in diameter, and the upper alloy grain is dissolved again to about 990 ℃ and then cooled to the present invention containing gold as a main component A precious metal alloy (gold alloy) for jewelry was obtained.

Table 4

(The furtherance of gold alloy)

ingredient	Content (mass%)
Pure gold	75.0
Silver	9.6
Dong	14.4
germanium	0.04
Bismuth	0.04
indium	0.92
Sum	100

Example 2 Preparation of Precious Metal Alloy for Jewelry (2)

By the following method, the noble metal alloy for jewelry of the present invention was prepared.

The components of the composition shown in Table 5 were uniformly mixed, dissolved at about 990 ° C., then poured into a mold and cooled to prepare a now. The present invention is dissolved again to about 990 ℃, water cooled or the like to form an alloy grain of 1.0 ~ 1.5mm in diameter, and after dissolving the alloy alloy at about 990 ℃ again and cooled to the present invention containing silver as the main component A precious metal alloy (silver alloy) for jewelry was obtained.

Table 5

(The furtherance of silver alloy)

ingredient	Content (mass%)
Sterling Silver	92.5
germanium	0.04
Bismuth	0.02
indium	7.44
Sum	100

(Measurement of melting point)

As for the precious metal alloy (silver alloy) for jewelry according to Example 2, the melting point was measured by thermal analysis / differential thermogravimetric analysis (TG / DTA), and these are shown in FIGS. 9 and 10, respectively. 10 is a partially enlarged view of FIG. 9. As shown in FIG. 9 and FIG. 10, the endothermic reaction starts around 880.4 ° C., and the melting point of the silver alloy according to Example 2 was about 880.4 ° C.

(Measurement of Tensile Characteristics)

The precious metal alloy for jewelry according to Example 2 was processed into a plate of length × width × thickness of 4.3 cm × 1.5 cm × 1.0 mmt, and detailed test conditions were as follows, and tensile strength was measured according to JIS Z2241. The results are shown in Table 6. As shown in Table 6, it was confirmed that the precious metal alloy for jewelry of Example 2 was an alloy excellent in tensile properties, easy to manufacture, and excellent in workability.

(Exam conditions)

Test apparatus: Universal testing machine (RTC-1310: made by Orientec Co., Ltd.)

Tensile Speed: 1.0mm / min

Test Specimen Dimensions: Length 37.0mm × Width 8.0mm × Thickness 1.0mmt

(Measurement result: tensile strength)

Table 6

Test Items	Measure
Breaking load	2.90 (296.33kgf)
Fracture stress	0.363 (37.04kgf / mm ² )
Increased break point	4.36
Point load	2.92 (297.35kgf)
Point stress	0.364 (37.17kgf / mm ² )
Increase maximum point	4.26

(Measurement of beakers hardness)

The Vickers hardness was measured based on the following test conditions with respect to the above-mentioned tensile strength and the plate sample of the same specification, and the results are shown in Table 7. The result here is the average of n = 4. As shown in Table 7, the noble metal alloy (silver alloy) for ornaments of Example 2 had an appropriate hardness, and thus it was confirmed that the alloy was excellent in manufacturability and workability.

(Exam conditions)

Test instrument: Micro hardness tester (MVK-G3500AT: manufactured by Akashi Co., Ltd.)

Test load: 0.10kgf (0.9806 N)

(Measurement result: Vickers hardness)

TABLE 7

Test Items	Measure
Vickers Hardness (Hv)	83.0

[Comparative Example 1] Preparation of jewelry for precious metal alloys (2006.01)

Precious metal alloys (gold alloys) for jewelry containing gold as the main composition, as in Example 1, except that germanium, bismuth, and indium were not used as the composition, and were replaced with the composition shown in Table 8 below. Was prepared.

Table 8

(The furtherance of gold alloy)

ingredient	Content (mass%)
Pure gold	75.0
Silver	15.0
Dong	10.0
Sum	100

[Comparative Example 2] Preparation of noble metal alloys for jewelry (4)

Precious metal alloys for silver jewelry (silver alloy) in the same manner as in Example 2, except that germanium, bismuth, and indium were not used as the composition, and were replaced with the composition shown in Table 9 below. Was prepared.

Table 9

(The furtherance of silver alloy)

ingredient	Content (mass%)
Sterling Silver	92.5
copper	7.0
zinc	0.5
Sum	100

Example 3 Preparation of Jewelry (1)

The gold alloy prepared in Example 1 was injected into a mold to prepare a ring (outer rounded) ring having a thickness of 2.5 cm, a width of 4.0 cm, a size 12, and a weight of 6.56 g.

Example 4 Preparation of Jewelry (2)

The silver alloy prepared in Example 2 was injected into a mold to prepare a ring (outer rounded) ring having a thickness of 2.5 cm, a width of 4.0 cm, a size 12, and a weight of 3.8 g.

Example 5 Preparation of Jewelry (3)

After drawing a round line having a diameter of 0.75 mm on the alloy prepared in Example 2, a cable chain having a ring of 5 mm width was manufactured, and a necklace having a length of 45 cm and a weight of 12.22 g was manufactured using the cable chain.

[Comparative Example 3] Preparation of Jewelry (4)

The gold alloy prepared in Comparative Example 1 was injected into a mold, and a ring (outer circumferential shape) ring having a thickness of 2.5 cm, a width of 4.0 cm, a size 12 and a weight of 6.56 g was prepared.

[Comparative Example 4] Preparation of jewelry (5)

The silver alloy prepared according to Comparative Example 2 was injected into a mold to prepare a ring having a thickness of 2.5 cm, a width of 4.0 cm, a size 12, and a weight of 3.8 g (round outer periphery).

[Comparative Example 5] Preparation of Jewelry (6)

After drawing a round line having a diameter of 0.75 mm on the alloy prepared in Comparative Example 2, a cable chain having a ring of 5 mm width was manufactured, and a necklace having a length of 45 cm and a weight of 12.22 g was manufactured using the cable chain.

Test Example 1 Determination of enzyme activity of amylase, an enzyme in saliva

The enzyme activity of amylase is known to be high or low in relation to the level of excitability (tension) of the sympathetic nervous system to stress load. In other words, it indicates the increase and decrease of the tension caused by the stress of the subject. Eight subjects were asked to wear the ornaments of Examples 3 to 5, and to determine the effect of relieving and suppressing mental and psychological stress by the jewelry of the present invention by measuring the enzyme activity of amylase using the following test method. It was.

(Test Methods)

(1) First, eight subjects were subjected to stress load by performing arithmetic and crepelin tests for 10 minutes without wearing jewelry.

(2) The execution of mental arithmetic was stopped to avoid stress load and to rest for 15 minutes.

(3) After the rest, the ornaments of Examples 3 to 5 were worn, and the arithmetic and crepelin tests of contents different from those of (1) were carried out for 10 minutes to take a stress load.

(4) Stop the mental arithmetic, so as not to put the stress load, and to rest while wearing jewelry.

Then, the subject's saliva was collected from "before the test", "after the end of (1)", "after the end of (2)", "after the end of (3)", and "after the end of (4)." Activity was measured.

High enzyme activity means a high state of mental and psychological stress. Regardless of whether or not jewelry is worn as in the example, amylase activity is increased by sympathetic nervous tension under stress load, but stress load is applied for 10 minutes while wearing the jewelry of the example ((2) After the end of (→ after the end of (3)), amylase activity was significantly lower than when the stress load was applied for 10 minutes without wearing jewelry (before the test → after the end of (1)) (P <0.03). From the above results, it has been confirmed that tension to mental and psychological stress is alleviated and suppressed by wearing the jewelry of Examples 3 to 5.

Test Example 2 Measurement of EEG

In the case of wearing the jewelry of the present invention, the change in brain wave was confirmed using the following test method.

(Test Methods)

(1) 25 men and women aged 18 to 22 years were selected as subjects. Subjects were advised to refrain from drinking alcohol and heavy exercise for 24 hours prior to this test and to get enough sleep, and to avoid ingesting irritants such as coffee on the test day.

(2) The test was carried out in a shading soundproof measurement room having a room temperature of 18 to 22 ° C. At this time, the subject was seated on the reclining seat with the headrest and the armrest at 135 °, and the subject was put on the EEG recording electrode and tested in a state where the subject was stabilized.

(3) The subject closed eyes for 10 minutes, and then wore the jewelry of Examples 3 to 5, and closed eyes to record EEG (8 channels) continuously for 10 minutes and did not wear jewelry. The eyes were closed without measuring EEG in the state. In addition, the subject conducted a 2-digit consecutive addition (crepelin test), which was given in advance, and asked to remember the number of additions and the answer, and then responded 10 minutes after the end of each session.

EEG recordings were taken from the median line of the head and the left and right foreheads. Subsequently, the fast Fourier transform frequency of the measured data is analyzed using analysis software manufactured by BIMUTAS, so that the occurrence frequency and spectral power integrals of the EEG waves δ wave, θ wave, α wave 1, α wave 2, and β wave are measured. Measured. In addition, the results of the calculation performed by the subject were collected at the end of each session as described above, and the number of additions and the addition results were recorded.

Measurement and recording results were verified with the θ wave component and the α wave component of each component of the EEG, and found the effect of the above components are raised.

As a result of conducting this test, for 16 subjects wearing trinkets during the crepelin test and increasing the power spectral integral of the θ wave region (4 to 6H), the θ wave power spectral integral value according to the presence or absence of the trinket, α wave power spectrum The mean value of the integrals was statistically tested (t-test). As a result, it was confirmed that the θ wave power spectral integral significantly increased (P <0.004) and the α wave power spectral integral significantly increased (P <0.004) by wearing the jewelry of the example.

As mentioned above, the use of the ornaments according to the present invention was able to confirm the effect of increasing concentration when it is necessary to concentrate the mind, such as the task being given, and to keep the stable state by removing the distraction.

In addition, immediately after the measurement, the subjective impression was asked about whether or not they could concentrate on the Keppelin test, with or without the jewelry of the example. Among the total 16 subjects whose subjective impression coincided with the increase and decrease of the θ wave power spectral integral value. 10 people. From this result, it was confirmed that the subject himself can perceive the effect by this invention, if he is concentrating on wearing the jewelry by this invention in the work which stress loads.

[Test Example 3] Oxidation Resistance and Sulfation Resistance Test

The jewelry (necklace) obtained from Example 3 and Comparative Example 3 was placed in a window (indoor) where sunlight shines during the day (from 7:00 to 17:00), and under 2 m of indoor light (fluorescent lamp) for 8 hours out of It was left to stand for 11 months and tested for the oxidation and sulfidation resistance of the jewelry. As a result, the ornament of Example 3 containing a predetermined amount of indium, germanium, and bismuth did not discolor at all and was found to be excellent in corrosion resistance. On the other hand, the ornaments of Comparative Example 3 (normally SV925) were found to be discolored in appearance to cause oxidation and sulfidation.

The precious metal alloy for jewelry of the present invention can be usefully used as a constituent material of, for example, necklaceless, bracelet, ring, watch case, watch band, and the like.

Claims

A precious metal alloy for jewelry containing at least one precious metal selected from the group consisting of gold, silver, and platinum, wherein the precious metal alloy for jewelry further comprises germanium, bismuth, and indium.
The method of claim 1,

The precious metal alloy for jewelry, characterized in that the germanium is 0.01 to 5.0 mass%, the bismuth is 0.01 to 3.0 mass%, and the indium is 0.1 to 30.0 mass% with respect to the whole alloy.
The method according to claim 1 or 2,

The precious metal alloy for jewelry according to claim 1, wherein the germanium, the bismuth, and the indium contain 0.3% by mass to 10.0% by mass relative to the total mass of the alloy.
The method according to claim 1 or 2,

The content ratio of the germanium and the bismuth is a precious metal alloy for jewelry, characterized in that the germanium: bismuth is 5: 2: 1 to 1.
The jewelry according to claim 1 or 2, wherein the jewelry for jewelry is worn in contact with the skin.