JPH065384Y2 - Decorative glass - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a decorative glass that can be widely used as a window material, a wall material, a partition material, etc. of a building and has a coloring property.

[Prior Art and its Problems] It is well known that a glass plate is coated with a coloring pigment and baked to form a decorative glass, which is used as a window material or the like.

As an example, Japanese Utility Model Publication No. Sho 49-23540 discloses a glass plate having a decorative property in which a large number of glass particles are adhered to the surface of the glass plate. However, the glass plates have different color tones when viewed from the front and back sides. It is not possible.

For example, it is known that an extremely thin glass film is formed on the surface of a glass plate and a glass plate having different front and back colors due to its transmission interference color and reflection interference color is produced, but it is not easy to form a glass film and Since it is extremely thin, it is liable to be damaged by scratches and the like, and the manufacturing cost and the like are also extremely expensive, which is generally difficult to widely adopt.

The present invention solves these problems, is extremely easy to manufacture, is resistant to external damage, can be reinforced, and can be widely used for partition materials, wall materials, etc. in addition to window materials. Provided is a decorative glass that has different color tones when viewed from the front and back sides of the glass.

[Means for Solving Problems] The present invention is to apply a colored glass preparation containing a low-melting glass powder, a coloring component, an organic bond, and a dispersion medium onto a transparent glass plate surface and heat-fuse the colored glass. In the layered decorative glass, the coloring component is used which has a different coloring color tone depending on oxidation and reduction conditions, and the coloring color tone is made different between the inner side of the colored glass layer in contact with the transparent glass plate and the facing surface side. That is, it is preferably performed by heat fusion in a normal oxidizing atmosphere, and during heat fusion, the inside of the colored glass layer is kept under a reducing condition by organic bonding and volatilization of the dispersion medium.

As the transparent glass plate, well-known soda lime glass, aluminosilicate glass, borosilicate glass, and various other types can be adopted, but soda lime glass that is most widely used, inexpensive and easily available is recommended.

The low melting point glass is not particularly limited,
It is recommended to use PbO-B ₂ O ₃ based glass because it is easy to set the heat treatment temperature and thermal expansion coefficient by adjusting the composition and the raw materials are easily available.

If, for example, copper oxide (CuO) is used as the coloring component, CuO-based blue to green coloration can be obtained under oxidizing conditions, and red to brown coloration due to Cu colloid can be obtained under reducing conditions.

In addition, for example iron oxide (Fe ₂ O _3), yellow-brown in oxidizing conditions, and the like can be obtained color blue grayish under reducing conditions, oxidation conditions, the number of differing components coloring tone by reducing conditions There are not a few, and a variety of colors can be selected.

However, in the case of mere ionic color development, even if a different color tone is obtained based on the change in ionic valence due to oxidation and reduction, since the colored glass layer has the transparency, the difference between the front and inner color tones clearly occurs. It is difficult, and rather requires attention because, when seen through, the color tone tends to become cloudy and the color tone is light.

The organic bond and the dispersion medium are not limited to those prepared by mixing ethyl cellulose, ethylene glycol or the like and dissolving them in water, and various kinds can be used.

These low-melting-point glass, coloring component, organic bond, a slurry prepared by preparing a dispersion medium is applied by a known method to the entire surface of the transparent glass plate or at a proper position with a desired pattern, and at that time, the coating film thickness is 100 μm or more. If it is less than that, it is difficult to maintain the inside of the coating film in contact with the glass plate under the reducing condition in the heat fusion, and it is difficult to cause the coloring component to develop the reduced color.

The upper limit of the coating thickness is not specified, but even if it exceeds 1000 μm, it has no meaning in producing the decorative glass of the present invention.
This is not preferable from the viewpoints of efficiency, efficiency, economics, etc. because the cost of raw materials increases and it is difficult to obtain a uniform thickness, or multiple coatings are required.

The heat treatment is carried out by ordinary electric heating, gas heating, heavy oil heating, etc., and no special atmosphere adjustment is required.

The heat treatment temperature is a transition temperature of the low melting point glass, more preferably a softening temperature or more, the transition temperature of the transparent glass plate by adjusting the glass component in advance so that it is 100 ° C or more lower than that of the transparent glass plate. Softening curve can be prevented.

Soda lime glass as a transparent glass plate has a transition temperature of 55.
While the temperature is 0 ° C. or higher, the PbO—B ₂ O ₃ -based low melting point glass can easily set it to 450 ° C. or lower.

While the coefficient of thermal expansion of soda-lime glass is on the order of 90 × 10 ^-7 / ℃ (at around 300 ℃, the same below), low melting point glass, that is, that of the colored glass layer is 80 × 10 ^-7 / ℃.
By setting it to the order or less, it is possible to obtain a dense and strong colored glass layer which is free from peeling, cracks and the like, and which is subjected to compressive stress.

[Embodiment] The present invention will be described below based on an embodiment.

As a transparent glass plate, SiO ₂ 72wt%, CaO 9wt%, MgO 4wt
%, Na ₂ O 13 wt% as a main component, and soda lime glass containing a small amount of Al ₂ O ₃ , K ₂ O, etc. was adopted. Its transition temperature was 560 ℃ and its coefficient of thermal expansion was 93 × 10 ^-7 / ℃.

As a mother glass of low melting point glass, SiO ₂ 2 wt%, PbO 69 wt%,
A pulverized product of 100 mesh or less of a high lead glass containing B ₂ O ₃ 21 wt%, Al ₂ O ₃ 4 wt% and ZnO ₃ wt% was used. The transition temperature was 400 ℃ and the coefficient of thermal expansion was 83 × 10 ^-7 / ℃.

Coloring, copper oxide (CuO) as an additive component, arsenous acid (As ₂ O ₃ ) is adopted, respectively 1 wt% to the low melting point mother glass, 2 wt% addition,
Mixed.

The prepared low melting point colored glass was kneaded with an ethyl cellulose-ethylene glycol-water-based bond and a dispersion medium to obtain a colored glass preparation slurry.

The prepared slurry is applied on a transparent glass plate in a desired pattern by brushing, dried and then gradually heated in a heating furnace,
After holding at about 550 ° C. for 1.5 hours, it was gradually cooled to obtain a decorative glass having a colored glass layer formed thereon.

In the decorative glass, the glass plate was not deformed, the colored glass layer was closely adhered to the transparent glass plate, peeling, cracking, etc. were not recognized, and scratches were also recognized in a scratch test with feldspar pieces. It was so strong that I couldn't do it.

Attached Figures 1 and 2 are a perspective view and a partially enlarged sectional view of the decorative glass, in which 1 is a transparent glass plate, 2 is a pattern consisting of a colored glass layer, and the front side thereof is a CuO-As ₂ O ₃ system. The celadon-colored pattern 3 made of a melt, and the inside of the transparent glass plate 1 in contact with the transparent glass plate 1 are a red-colored pattern 4 in which CuO is made into a colloid of Cu by a reducing action accompanied by volatilization of organic components.

If this is applied to, for example, a partition of a general house, it is possible to obtain a subdued blue color tone on the one hand and a reddish warm color tone on the other hand.

Of course, not only CuO but also various color tones can be obtained by selecting various coloring components, and various patterns and various color tones can be combined to further enhance the decorative effect and broaden the range of application. is there.

[Advantages of the Invention] According to the present invention, by making the color tones of the glass plate different from each other when viewed from the front and back sides, the glass plate can be made extremely decorative and can be widely applied as a building material. It is practically effective in that it is simple and easy to manufacture and can be manufactured at low cost.

[Brief description of drawings]

1 and 2 are a perspective view and a partially enlarged sectional view of the present invention. 1 ... Transparent glass plate, 2 ... Coloring pattern 3 ... Celadon pattern, 4 ... Red pattern

Claims (3)

[Scope of utility model registration request] 1. A decorative glass in which a colored glass preparation containing a low-melting glass powder, a coloring component, an organic bond, and a dispersion medium is applied to a transparent glass plate surface and heat-fused to form a colored glass layer. A decorative glass comprising the coloring component having a different coloring color tone depending on reducing conditions, wherein the coloring color tone is different between the inside of the colored glass layer in contact with the transparent glass plate and the facing front side. 2. The decorative glass according to claim 1, which is heat-fused in a normal oxidizing atmosphere. 3. The decorative glass according to claim 1, wherein the inside of the colored glass layer is held under a reducing condition by organic bonding and volatilization of a dispersion medium during heat fusion.