JPH0717776A - Bonding method for pottery and glass - Google Patents

Abstract

PURPOSE:To bond a low temp. series pottery material and glass in strongly integrated state by fusing them without generating crack by mounting glass on the compact consisting of the low temp. series pottery material and sintering. CONSTITUTION:The low temp. series pottery material whose coefficient of thermal expansion is made close to that of glass by the method which adds a frit, etc., by a prescribed amount is prepared. The frit consisting of soda glass powder and the material compounded Gairome-clay, Kamado-feldspar is used as the low temp. series pottery material. Then water is added to the material and kneaded to form slurry. The compact such as cylindrical leg part 2, etc., is formed by using the slurry. Then, the sheet glass 3 made of soda-lime glass and worked into semispherical shape, etc., is mounted on the leg part 2, and they are sintered in an air atmosphere and cooled. In this way, the glass 1, etc., made by fusing the leg part 2 and the glass 3 integrally and mutually bonded strongly is produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, ornaments having a three-dimensional pattern, general tableware, containers, lighting equipment, accessories, tableware, and interior and exterior building materials such as tiles and wall materials. Also, the present invention relates to a method for joining ceramics and glass applied to durable consumer goods such as furniture.

[0002]

2. Description of the Related Art As a method of joining ceramics and glass, for example, a method of simply contacting a ceramic material and a glass material and simultaneously firing them is conceivable. However, at a normal firing temperature (for example, 1230 ° C.) Since the coefficient of thermal expansion during firing and the coefficient of thermal expansion of glass are very different,
When cooled, cracks occur at the joints, etc., and the ceramics and glass cannot be joined well.

Therefore, conventionally, various methods such as the following have been developed as a method for joining a ceramic and a glass. For example, there is a method in which a ceramic and a glass are separately fired, and then a glaze is interposed between the ceramic and the glass, and the firing is performed again to join them.

Further, there is a method in which after firing the ceramics, the ceramics are heated (preheated) again, and the molten glass is fused and welded to the ceramics in this preheated state, and then cooled.

[0005]

However, each of the above-mentioned conventional methods has advantages and disadvantages, and is not always preferable. In other words, in the above technique, since the pre-fired ceramics and glass are joined using glaze,
There is a problem that the bonding force is not necessarily high and that firing is required three times until completion.

Further, in the above technique, the ceramic must be preheated to a high temperature in advance and the molten glass must be adhered to the surface of the ceramic before the ceramic and the glass are joined. It's tough. Moreover, there is a problem that it is not easy to mold glass into an arbitrary shape and the bonding strength is not always sufficient.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for joining a ceramic and a glass, which enables strong joining without cracks.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 arranges a glass in a molded body made of a low temperature type ceramic material and fires the low temperature type ceramic and the glass. The gist is a method of joining ceramics and glass, which is characterized by joining by fusion.

According to the second aspect of the present invention, the glass is placed in a low temperature system when the low temperature system ceramic and the glass are fired by arranging the glass in a molded body made of the low temperature system ceramic material and firing the glass. The gist is a method for joining ceramics and glass, which is characterized in that the ceramics are joined in a shape that holds them.

Here, each configuration of the above invention will be described in detail. a) The above-mentioned low temperature type ceramics has a water absorption rate according to JIS of, for example, 1230 ° C. when it is fired at 800 to 900 ° C.
It is the same as the water absorption of ceramics fired at a certain level. Specifically, the water absorption rate of ceramics is 22.0% or less, and the water absorption rate of porcelain is 1.0% or less.

B) It is desirable that the coefficient of thermal expansion of this low-temperature ceramics should match the coefficient of thermal expansion of glass as much as possible.
For example, the coefficient of thermal expansion of low temperature type ceramics at 500 to 550 ° C. is 7.00 × 10 ^{−6 to} 11.5 × 10 ⁻⁶ , and the coefficient of thermal expansion of glass at 500 to 550 ° C. is 9.00 × 10 10.
The range of ^{−6 to} 9.2 × 10 ⁻⁶ is preferable.

C) Examples of the glass include ordinary glass such as plate glass. Specifically, soda lime type, lead type, borosilicate type, aluminosilicate type, boric acid type, phosphate type, aluminic acid type, fluoride type, calgon type, and amorphous type are preferable. In addition, conventional coloring materials for colored glass, such as Fe ₂ O ₃ , Co ₂ O ₃ , NiO, and C
r ₂ O, MnO ₂ , V ₂ O _{5 and the} like can also be used.

D) The firing temperature is preferably in the range of 800 to 900 ° C., but particularly 830 to 870 near 850 ° C.
It is preferable that the temperature is ° C because fusion of the ceramic and the glass can be realized. e) The frit is one in which an alkaline component is processed into a glass state to be insoluble in water, and the frit is in the range of 40 to 90% by weight (more preferably 40 to 7%).
0% by weight) is suitable. As the frit, soda-lime glass powder with a relatively high coefficient of thermal expansion,
Brit such as borosilicate glass having a lower coefficient of thermal expansion can be used, but the coefficient of thermal expansion changes depending on its composition, for example, by increasing the soda content of soda-lime glass.

F) In addition to the frit, it is preferable to add, for example, frog clay to the ceramic material as a material for improving the formability.

[0015]

The above-described method of joining the ceramic and the glass of the present invention is (for example, by including a predetermined range of frit).
This is a method in which a molded body is formed by using a low-temperature ceramic material close to the coefficient of thermal expansion of glass, and glass such as plate glass is placed in the molded body and fired.

Therefore, for example, by selecting a predetermined amount of frit and a firing temperature, it is possible to fuse the low temperature type ceramics and the glass during firing, so that the low temperature type ceramics and the glass are cracked. Instead, they will be joined in a strongly integrated state. In addition, by selecting other frit amount and firing temperature,
While the low temperature type ceramics are manufactured, the low temperature type ceramics and the glass are not joined by fusion, but are joined in a state in which the glass holds the low temperature type ceramics (for example, like wrapping).

[0017]

EXAMPLES Examples of the method for joining ceramics and glass according to the present invention will be described below. (Example 1) The joined body of ceramics and glass manufactured by this example is a glass 1 as shown in Fig. 1 (a).

First, as a raw material for ceramics, a frit (coefficient of thermal expansion; made of soda glass powder (having a large amount of soda)).
α = about 13 × 10 ⁻⁶ ); 60% by weight, frog clay; 20% by weight, Kamado feldspar; 20% by weight, using a ceramic material (coefficient of thermal expansion; α = about 10 × 10 ⁻⁶ ). Prepare powder. Then, 30% by weight of water is mixed with this ceramic material and kneaded in a ball mill for 4 hours to make mud. Next, this mud is put in a frame or the like to form a cylindrical leg portion 2 and dried. Next, a plate glass (coefficient of thermal expansion; α = about 10 × 10 ⁻⁶ ) 3 which is a soda-lime glass processed into a hemispherical shape is placed on the leg portion 2, and the plate glass is placed at about 850 ° C. in an air atmosphere. Bake for 8 hours and then cool. By this firing, the ceramic and the glass are fused and integrated with each other, so that the strongly bonded glass 1 is manufactured. (Embodiment 2) The joined body of ceramics and glass manufactured in this embodiment is a dish 5 as shown in FIG. 1 (b).

First, a ceramic material similar to that of the above-mentioned Example 1 is arranged so as to cover the disk-shaped plate glass 6 to form an annular portion 7, which is dried and then under the same conditions as in Example 1. Bake. By this firing, the ceramic and the glass are fused and integrated with each other, and the plate glass 6 is slightly recessed at the center thereof, so that the strongly bonded dish 5 is manufactured. (Embodiment 3) The joined body of ceramics and glass manufactured in this embodiment is a vase 10 as shown in FIG. 1 (c).

First, a ceramic material similar to that used in the first embodiment is used to form a cylindrical portion 11 having a bulged center and a window portion 12 on its side surface. Then, after drying, the plate glass 13 is fitted and fixed in the window portion 12 and fired under the same conditions as in Example 1. By this firing, the ceramics and the glass are fused and integrated, and the vase 10 in which the inside can be seen through the window 12 is manufactured.

Next, an experimental example confirming the effect of the present invention will be described. (Experimental Example 1) In this experiment, the amount of frit (soda glass powder) in the ceramic material was mainly changed, and the bonding state between the ceramic and the glass was observed.

First, using the materials shown in Table 1 below, A to
Four kinds of ceramic materials of D were prepared, and rings were formed using these ceramic materials. Next, a plate glass of soda-lime glass having a coefficient of thermal expansion of about 10 × 10 ⁻⁶ was placed on this ring and fired at the temperature shown in Table 2 below. Then, the bonded state of the fired ceramics and the glass was observed. The results are also shown in Table 2.

[0023]

[Table 1]

[0024]

[Table 2]

As is clear from this experiment, by firing the above-mentioned low temperature type ceramic material and glass at 800 to 900 ° C., the low temperature type ceramic and glass can be bonded in various modes. In particular, Samples C and D fired at 850 ° C. are preferable because the porcelain and the glass are sufficiently fused and integrated. Also, for example, 850
In Sample A fired at 0 ° C., the glass was formed so as to wrap the low temperature ceramics. (Experimental Example 2) In this experiment, the kind and ratio of the frit to be used were changed and the joining state of the ceramic and the glass was observed.

No. 1 to No. 1 using the materials shown in Table 3 below.
11 kinds of 11 kinds of ceramic materials were prepared, this ceramic material was put on the plate glass of soda lime glass, and it baked at 850 degreeC. Then, the bonded state of the fired ceramics and the glass was observed. As the frit, soda glass powder having a large coefficient of thermal expansion and soft (a large amount of soda) or hard borosilicate glass powder having a small coefficient of thermal expansion was used. Sample N
o.1 and No.11 are the same borosilicate glass,
Since the amount of Keisha is different, the coefficient of thermal expansion is different.

[0027]

[Table 3]

Of these samples, samples No. 6 to 9 had no cracks, and the ceramics and glass were preferably fused and joined together. (Experimental Example 3) Ceramic material similar to that of Experimental Example 2 (Sample N
o.1 to 11) were heated, and the elongation and the coefficient of thermal expansion at that time were measured. Further, the elongation and the coefficient of thermal expansion of soda-lime glass (plate glass) were also measured (Sample No. 12). The results are shown in FIGS. 2 and 3 and Tables 4 and 5 below.

[0029]

[Table 4]

[0030]

[Table 5]

As is clear from FIGS. 2 and 3 and Tables 4 and 5, the samples Nos. 6 to 9 which are not cracked are the ceramic material and the glass, and the inclination (elongation) of the graph is shown. It can be seen that the difference in the expansion coefficient and the coefficient of thermal expansion in the range from the dislocation point (where the graph changes abruptly) to the softening point (which is the apex of the graph) is small. Specifically, for example, the coefficient of thermal expansion of low temperature type ceramics at 500 to 550 ° C. is 7.00 × 10 ^{−6 to} 11.5 × 10 ⁻⁶ , and that of glass is 50.
Coefficient of thermal expansion at 0 to 550 ° C. is 9.00 × 10 ⁻⁶
It is preferably in the range of 9.2 × 10 ⁻⁶ .

It is needless to say that the present invention is not limited to the above-mentioned embodiment and can be carried out in various modes without departing from the scope of the present embodiment.

[0033]

As described above in detail, in the method for joining ceramics and glass of the present invention, a molded body is formed using a low temperature type ceramic material, and glass is placed in the molded body and fired. For example, the low temperature ceramics and the glass can be fused by adjusting the amount of frit and the firing temperature. Therefore, it is possible to join the low temperature ceramics and the glass in a strongly integrated state without causing cracks. Alternatively, the low temperature ceramics can be fired and bonded together while the glass holds the low temperature ceramics so as to wrap it, for example.

As a result, there is a remarkable effect that it is possible to easily manufacture a container, a decorative article, a building material, etc., which has a cool feeling and gives an excellent impression, which is unconventional and in which ceramics and glass are joined. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing Examples 1 to 3 of the present invention.

FIG. 2 is a graph showing the results of Experimental Example 3.

FIG. 3 is a graph showing the results of Experimental Example 3.

[Explanation of symbols]

 1 ... Glass 5 ... Plate 10 ... Vase

Claims (2)

[Claims] 1. A method for joining ceramics and glass, wherein the low temperature ceramics and the glass are fused together by arranging the glass in a molded body made of the low temperature ceramics material and firing it. 2. The low-temperature ceramics and the glass are bonded to each other in a shape such that the glass holds the low-temperature ceramics together with the baking of the low-temperature ceramics by arranging the glass in a molded body made of the low-temperature ceramics material and sintering the glass. A method for joining ceramics and glass, characterized by: