KR102040489B1 - Silver mirror and manufacturing mehtod for the same - Google Patents

Abstract

The present invention glass substrate layer; A silver layer formed on the glass substrate layer; And a silver mirror formed on the silver layer and including a first antioxidant layer including molybdenum.

Description

Silver mirror and its manufacturing method {SILVER MIRROR AND MANUFACTURING MEHTOD FOR THE SAME}

The present invention relates to a silver mirror having excellent oxidation resistance and scratch resistance and a method for producing the same.

The mirror is a tool that reflects the shape of an object by using light reflection, and may classify the type of mirror according to a material coated on the glass substrate.

Since the reflectivity of aluminum is better than that of other metals in the ultraviolet, middle, and far-infrared regions, a mirror coated with aluminum is mainly used on the upper portion of the glass substrate, but in the visible region, since the reflectance of silver is better than other metals such as aluminum, the glass substrate Silver coated mirrors are mainly used.

However, since silver has a disadvantage of being expensive and well oxidized in the air, various studies have been conducted to overcome this problem.

According to the conventional research, after coating silver on the glass substrate, a method of preventing oxidation of silver by applying an anti-oxidation paint or the like has been adopted.

Korean Laid-Open Patent Publication No. 10-2001-0076753 (2001.08.16.)

The present invention provides a glass substrate layer excellent in oxidation resistance and scratch resistance; A silver layer formed on the glass substrate layer; And a silver mirror formed on the silver layer and including a first antioxidant layer including molybdenum.

However, the technical problem to be achieved by the present invention is not limited to the above-mentioned problem, another task that is not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention glass substrate layer; A silver layer formed on the glass substrate layer; And a silver mirror formed on the silver layer and including a first antioxidant layer including molybdenum.

The present invention comprises the steps of (a) forming a silver layer on the glass substrate layer; And (b) forming a first antioxidant layer including molybdenum on the silver layer.

Silver mirror according to the present invention is a glass substrate layer; A silver layer formed on the glass substrate layer; And a first antioxidant layer formed on the silver layer and including molybdenum, wherein the silver mirror is excellent in both oxidation resistance and scratch resistance due to the first antioxidant layer.

The silver mirror further forms a second antioxidant layer including a metal having a higher Mohs hardness than the molybdenum on the first antioxidant layer, so that the silver mirror maintains excellent oxidation resistance due to the second antioxidant layer, The scratch resistance can be further improved.

1 is a view showing a silver mirror according to an embodiment of the present invention.
2 is a view showing a silver mirror according to another embodiment of the present invention.
FIG. 3 is a photograph showing the results of evaluation of oxidation resistance for 30 days in a 25 ° C. atmosphere for the silver mirror (left) prepared in Comparative Example 1 and the silver mirror (right) prepared in Example 1. FIG.
FIG. 4 is a photograph showing the results of evaluation of oxidation resistance for 30 days in an atmosphere of 25 ° C. in the silver mirror (left) prepared in Example 1 and the silver mirror (right) prepared in Comparative Example 2. FIG.

The inventors of the present invention, while studying a mirror having a silver layer formed on the upper surface of the glass substrate, by forming a first antioxidant layer containing molybdenum on the silver layer, it was confirmed that both oxidation resistance and scratch resistance can be improved, The present invention has been completed.

As used herein, the term “oxidation resistance” refers to a chemical property, which is a property that resists oxidation without being oxidized at high temperature and room temperature.

In addition, the term "scratch resistance" in the present specification is a mechanical property, which means a hard property without scratching the surface, it is possible to measure the Mohs hardness as one of the methods for evaluating scratch resistance. At this time, "Mohs hardness" refers to the hardness of the material, which is hard to be scratched by the scratches are a kind of scratch hardness tester, Mohs hardness tester is used for the measurement. Specifically, Mohs hardness is classified into 1 to 10, 1 is talc, 2 is gypsum, 3 is calcite, 4 is fluorite, 5 is apatite, 6 is feldspar, 7 is quartz, 8 is pyrite, 9 is corundum, 10 Is a diamond.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. In the drawings, the thicknesses of layers and regions are exaggerated for clarity.

In the following, any configuration is formed on the “top (or bottom)” of the substrate, which means that any configuration is formed in contact with the top (or bottom) of the substrate, as well as the substrate and the top (or bottom) of the substrate. It does not limit to not including another structure between arbitrary structures formed in ().

Hereinafter, the present invention will be described in detail.

Silver mirror

The present invention glass substrate layer; A silver layer formed on the glass substrate layer; And a silver mirror formed on the silver layer and including a first antioxidant layer including molybdenum.

In the present invention, instead of coating a silver on the glass substrate and then applying an anti-oxidant paint to prevent oxidation of silver, in the present invention, a first antioxidant layer including molybdenum is formed on the silver layer formed on the organic substrate layer. It features.

1 is a view showing a silver mirror according to an embodiment of the present invention.

As shown in FIG. 1, the silver mirror according to the embodiment of the present invention comprises a glass substrate layer 10; A silver layer 20 formed on the glass substrate layer 10; And a first antioxidant layer 30 formed on the silver layer 20 and including molybdenum. In this case, an anti-fingerprint film 40 may be further included on the lower portion of the substrate layer 10 and the upper portion of the first antioxidant layer 30.

2 is a view showing a silver mirror according to another embodiment of the present invention.

As shown in FIG. 2, the silver mirror according to another embodiment of the present invention may include a glass substrate layer 10; A silver layer 20 formed on the glass substrate layer 10; A first antioxidant layer 30 formed on the silver layer 20 and including molybdenum; And a second antioxidant layer 31 formed on the first antioxidant layer 30 and including a metal having a higher Mohs hardness than the molybdenum. In this case, an anti-fingerprint film 40 may be further included on the lower portion of the substrate layer 10 and the upper portion of the second antioxidant layer 31.

First, the silver mirror according to the present invention is a glass substrate layer 10; And a silver layer 20 formed on the glass substrate layer 10.

The glass substrate layer 10 may be made to be resistant to external impact by a chemical strengthening treatment for stress reinforcement in the general window glass material, and to be able to be bent to some extent by thinning the thickness to about 0.5 ~ 0.7 mm. Specifically, the glass substrate layer 10 may be a glass material that has been chemically strengthened through heat treatment. Here, the glass material may mean a glass material that has been strengthened through a conventional glass material or impurity treatment. At this time, by replacing the Na in the conventional glass material with K having a larger atomic diameter as the glass material strengthened by impurity treatment, a glass material having increased stress can be used.

At this time, since the thickness of the glass substrate layer 10 is 0.5 mm to 0.7 mm, the glass substrate layer 10 is resistant to external impact and may have a property that can be flexibly bent at the same time.

The silver layer 20 has an excellent reflectance in the visible light region, the silver layer 20 may have a visible light reflectance (VLT) of 90% or more, preferably 93% or more, but is not limited thereto.

The silver layer 20 may be formed through various coating methods known on the glass substrate layer 10, and may be coated using electroplating, chemical vapor deposition (CVD), physical vapor deposition (PVD), or the like. have.

At this time, the thickness of the silver layer 20 is 100 nm to 120 nm, it can be produced to a minimum thickness.

The silver material constituting the silver layer 20 not only has a problem of being well oxidized in the air, but also has a problem that the scratch resistance is weak due to the Mohs hardness of only 2.5 to 3.0, which needs to be improved.

Next, the silver mirror according to the present invention is formed on the silver layer 20, and includes a first antioxidant layer 30 including molybdenum.

The first antioxidant layer 30 may be formed on the silver layer 20 to compensate for the problem caused by the silver material. In particular, in order to improve scratch resistance due to a silver material, the Mohs hardness of the first antioxidant layer 30 is preferably 5.0 to 6.0, but is not limited thereto.

Specifically, the first antioxidant layer 30 is characterized in that it comprises molybdenum, molybdenum not only has excellent oxidation resistance, but also corresponds to a metal having excellent scratch resistance as well as Mohs hardness of about 5.5. In addition to molybdenum, metals having a higher Mohs hardness than silver include nickel (Moss hardness = about 4.0), titanium (Moss hardness = about 6.0), chromium (Moss hardness = about 8.0), and silicon (Moss hardness = about 6.5). In comparison with molybdenum, the remaining metals are relatively low in oxidation resistance.

More specifically, when the molybdenum material is applied to the first antioxidant layer 30, as a result of the oxidation resistance evaluation for 30 days in 25 ℃ atmosphere, it is confirmed that the oxidation does not occur for 30 days to maintain a stable state, the molybdenum In the case of applying titanium, chromium and silicon instead of the material, oxidation resistance evaluation for 30 days in the atmosphere at 25 ℃, it is confirmed that the oxidation progresses gradually in the corner portion and the oxidation proceeds gradually in the silver layer.

The first antioxidant layer 30 may also be formed by various coating methods known on the silver layer 20, and may be coated using electroplating, chemical vapor deposition (CVD), physical vapor deposition (PVD), or the like. Can be.

At this time, the thickness of the first antioxidant layer 30 is preferably maintained to 0.5 ㎛ to 1.0 ㎛, but is not limited thereto. If the thickness of the first antioxidant layer 30 is less than 0.5 μm, there is a problem in that both oxidation resistance and scratch resistance are reduced.

Optionally, the silver mirror according to the present invention includes a second antioxidant layer 31 formed on the first antioxidant layer 20 and comprising a metal having a higher Mohs hardness than the molybdenum.

The second antioxidant layer 31 may be formed on the first antioxidant layer 30 to further compensate for the limitation caused by the molybdenum material. In particular, in order to further improve scratch resistance due to molybdenum material, the second antioxidant layer 31 may include a metal having a higher Mohs hardness than the molybdenum, and the second antioxidant layer 31 may have a Mohs hardness. It is preferably at least 6.0, but is not limited thereto.

Specifically, the second antioxidant layer 31 may include one or more metals selected from the group consisting of titanium, silicon, and chromium, and preferably include chromium, but is not limited thereto. At least one metal selected from the group consisting of titanium, silicon, and chromium has an advantage of greatly improving scratch resistance due to high Mohs hardness compared to molybdenum, although the oxidation resistance is lowered compared to molybdenum.

The second antioxidant layer 31 may also be formed through various coating methods known on the first antioxidant layer 30, and may be electroplated, chemical vapor deposition (CVD), physical vapor deposition (PVD), or the like. Can be coated.

At this time, the thickness of the second antioxidant layer 31 is preferably maintained to 0.5 ㎛ to 1.0 ㎛, but is not limited thereto. If the thickness of the second antioxidant layer 31 is less than 0.5 μm, there is a problem that scratch resistance is lowered.

Optionally, the silver mirror according to the present invention further includes an anti-fingerprint film 40 on the lower portion of the substrate layer 10, on the first antioxidant layer 30, or on the second antioxidant layer 31. By preventing fingerprints from being formed on the silver mirror, the reflectance can be kept constant in the visible light region.

Silver mirror  Manufacturing method

The present invention comprises the steps of (a) forming a silver layer on the glass substrate layer; And (b) forming a first antioxidant layer including molybdenum on the silver layer.

Optionally, the method may further include forming a second antioxidant layer including a metal having a higher Mohs hardness than the molybdenum on the first antioxidant layer.

Optionally, (d) may further include forming an anti-fingerprint film on the bottom of the substrate layer or on the first antioxidant layer.

Since the details of the glass substrate layer, the silver layer, the first antioxidant layer, the second antioxidant layer, and the anti-fingerprint film have been described above, redundant descriptions will be omitted.

Therefore, the silver mirror according to the present invention comprises a glass substrate layer; A silver layer formed on the glass substrate layer; And a first antioxidant layer formed on the silver layer and including molybdenum, wherein the silver mirror is excellent in both oxidation resistance and scratch resistance due to the first antioxidant layer.

The silver mirror further forms a second antioxidant layer including a metal having a higher Mohs hardness than the molybdenum on the first antioxidant layer, so that the silver mirror maintains excellent oxidation resistance due to the second antioxidant layer, The scratch resistance can be further improved.

Hereinafter, preferred examples are provided to aid in understanding the present invention. However, the following examples are merely provided to more easily understand the present invention, and the contents of the present invention are not limited by the following examples.

[ Example ]

Example  One

The silver layer 20 having a thickness of about 100 to 120 nm was deposited on the glass substrate layer 10 using the PVD method. After depositing the first antioxidant layer 30 (Moss hardness = 5.5) of molybdenum material having a thickness of about 0.5 μm on the silver layer 20 using the PVD method, the lower portion of the glass substrate layer 10 and the first antioxidant layer ( 30) by coating each of the anti-fingerprint film 40 of PET material, a silver mirror was prepared (see Fig. 1).

Example  2

The silver layer 20 having a thickness of about 100 to 120 nm was deposited on the glass substrate layer 10 using the PVD method. Molybdenum-based first anti-oxidation layer 30 (Moss hardness = 5.5) and second anti-oxidation layer 31 (chromium) of about 0.2 μm thickness by using PVD method on silver layer 20 Hardness = 8.0) was sequentially deposited, and then coated with an anti-fingerprint film 40 made of PET on the glass substrate layer 10 and the first antioxidant layer 30, respectively, to prepare a silver mirror (FIG. 2). Reference).

Comparative example  One

A silver mirror was manufactured in the same manner as in Example 1 except that the deposition of the first antioxidant layer 30 made of molybdenum was omitted.

Comparative example  2

A silver mirror was manufactured in the same manner as in Example 2 except that the deposition of the first antioxidant layer 30 made of molybdenum was omitted.

FIG. 3 is a photograph showing the results of evaluation of oxidation resistance for 30 days in a 25 ° C. atmosphere for a silver mirror (left) prepared in Comparative Example 1 and a silver mirror (right) prepared in Example 1. FIG.

As shown in FIG. 3, in Comparative Example 1 in which the deposition of the first antioxidant layer 30 made of molybdenum and the second antioxidant layer 31 made of chromium are omitted, the first antioxidant layer 30 made of molybdenum Compared with Example 1 in which only deposition was carried out, it was visually confirmed that oxidation resistance was greatly reduced.

FIG. 4 is a photograph showing the results of evaluation of oxidation resistance for 30 days in a 25 ° C. atmosphere for the silver mirror (left) prepared in Example 1 and the silver mirror (right) prepared in Comparative Example 2. FIG.

As shown in FIG. 4, in the case of Comparative Example 2 in which only the second antioxidant layer 31 made of chromium was deposited without the deposition of the first oxide layer 30 made of molybdenum, the first oxide made of molybdenum Compared with Example 1 in which only the prevention layer 30 is deposited, it is visually confirmed that oxidation resistance is greatly reduced.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims (8)

A glass substrate layer;
A silver layer formed on the glass substrate layer and having a visible light reflectance (VLT) of 90% or more and a Mohs hardness of 2.5 to 3.0;
A first antioxidant layer formed on the silver layer and formed of molybdenum; And
It is formed on the first antioxidant layer, and includes a second antioxidant layer of chromium material,
Mohs hardness of the first antioxidant layer is 5.0 to 6.0, Mohs hardness of the second antioxidant layer is characterized in that higher than the Mohs hardness of the first antioxidant layer,
Oxidation resistance and scratch resistance are mirrors.
delete The method of claim 1,
The thickness of the first antioxidant layer is 0.5 ㎛ to 1.0 ㎛, oxidation and scratch resistance silver mirror.
delete delete The method of claim 1,
The thickness of the second antioxidant layer is 0.5 ㎛ to 1.0 ㎛, oxidation and scratch resistance silver mirror.
The method of claim 1,
Oxidation resistance and scratch resistance further comprises an anti-fingerprint film formed on the lower portion of the substrate layer or on the first antioxidant layer.
(a) forming a silver layer having a Mohs hardness of 2.5 to 3.0 while having a visible light reflectance (VLT) of 90% or more on the glass substrate layer;
(b) forming a first antioxidant layer made of molybdenum on the silver layer; And
(c) forming a second antioxidant layer of chromium on the first antioxidant layer,
Mohs hardness of the first antioxidant layer is 5.0 to 6.0, Mohs hardness of the second antioxidant layer is characterized in that higher than the Mohs hardness of the first antioxidant layer,
Oxidation resistance and scratch resistance.

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