JP2859133B2 - Manufacturing method of kiln modulated glazed tile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a glazed kiln tile.

[0002]

2. Description of the Related Art Conventionally, kiln-modulated tiles have been frequently used as tiles having a tasteful decorative pattern. The method of manufacturing the kiln-modulated tile is different between firing in a tunnel kiln and firing in a roller hearth kiln (RHK).

[0003] In the former case, firing is performed by heating with a burner, so that a kiln-modulating pattern appears based on an oxidation-reduction reaction.

[0004] On the other hand, in the latter case of firing by RHK, since radiant heat is generally used as a heating method, a kiln-modulated pattern is produced by using a glaze containing PbO regardless of the above method.

Specifically, for example, as shown in Table 2, Pb
O, (here bright glaze blue) under glaze having a predetermined composition which contains a TiO ₂ was 102 (see FIG. 3) to the substrate (tile green body) Glazed 100 surface e.g. button hook, then also contain PbO, the TiO ₂ And their content and T
The upper glaze (here, green mat glaze) 104 having a different iO ₂ / PbO ratio is similarly glazed and glazed, and then fired.

[0006]

[Table 2]

The change at this time is schematically shown in FIG. As shown in the figure, when the above-glazed tile is fired by a roller hearth kiln, the lower glaze 102 and the upper glaze 104 are melted during the firing, and the boundary between the two types of glazes 102 and 104 is melted. With each glaze 10
Reaction layer (intermediate layer) 106 in which 2,104 are uniformly melted
Generate Thereafter, when this is cooled, the crystal component in the mat glaze crystallizes in the intermediate reaction layer 106 to form a semi-bright glaze layer.

As a result, the tile surface is in a state in which the mat glaze, the bright glaze, and the intermediate semi-bright glaze are exposed, and the kiln modulation is given by the semi-bright glaze layer (reaction layer 106) that appears by the reaction during firing. .

Here, the function of PbO is as follows. That is, PbO lowers the fire resistance of the glaze to promote the fusion and reaction between the bright glaze and the mat glaze, and also precipitates in the intermediate reaction layer 106, that is, the semi-bright glaze layer, as a crystal component.

[0010]

However, this Pb
Since O is harmful to the human body, its use has been severely restricted in recent years, and there is a problem in that use requires lead processing equipment. Further, this method has a problem that reproducibility is poor because the method modifies the kiln based on the reaction inside the kiln.

[0011]

The inventors [SUMMARY OF] is the background of the above circumstances, has been made to obtain a production method that can emerge kiln modulation pattern without using PbO, its gist, respectively Zegeru TiO ₂ and BaO are replaced by Ti
O _{2: 0.39~0.45,} TiO ₂ /BaO:2.4
A mat glaze containing at to 2.8, TiO ₂ and BaO
With TiO ₂ : 0.30 to 0.37, TiO ₂ / BaO:
Bright glazes contained in 1.8-2.3 and among them
TiO ₂ : 0.35-0.40, Ti
O _{3 /} BaO: A semi-bright glaze containing 2.2 to 2.5 was prepared, and these glazes were applied to the surface of the base such that each glaze was exposed to the surface during firing. In a roller hearth kiln.

[0012]

As described above, the present invention is characterized in that BaO is used in place of PbO. However, in the case of BaO, there is no effect of greatly lowering the melting point unlike PbO, and therefore BaO is used instead of PbO.
The use of only A does not produce a third layer due to the reaction between the bright glaze and the mat glaze during firing.

Therefore, in the present invention, a reaction layer that should be formed during firing, that is, a semi-bright glaze having an intermediate composition is prepared in advance as a third glaze, and this is coated on a substrate surface together with a bright glaze and a mat glaze. Occasionally, the mat glaze, the bright glaze, and the semi-bright glaze were applied to the surface of the substrate in such a manner as to be exposed on the surface, and were fired using RHK. In this case, the third layer performs the same function as if it were generated by the reaction at the time of firing, and as a result, the decorative pattern of the glaze of the kiln modulation can be obtained.

In the method according to the present invention, since the third glaze for producing the kiln-modulated pattern is previously applied to the substrate surface regardless of the reaction inside the kiln, the reproducibility of the kiln-modulated pattern is improved. Has high features.

In the present invention, BaO is a component which precipitates crystals by reacting with TiO _2, and a specific content for achieving the object of the present invention is a bright glaze expressed in a Zegel type. 0.30 to 0.3 of TiO ₂
7, the TiO ₂ / BaO ratio is good to the 1.8 to 2.3.

As for the mat glaze, the TiO ₂ content is 0.39 to 0.45, and the ratio of TiO ₂ / BaO is 2.4.
Be 2.8, further TiO ₂ as an intermediate for semi-bright glaze from 0.35 to 0.40, is good and the proportion of TiO ₂ / BaO 2.2 to 2.5.

The reason that the ratio of TiO ₂ / BaO in the bright glaze is 1.8 to 2.3 is that the ratio is 1.8.
If the ratio is smaller than this, the glaze reacts too much, that is, it melts too much, resulting in too much gloss, and if the ratio is larger than 2.3, it becomes semi-bright glaze.

In the case of a mat glaze, TiO ₂ / BaO
The reason for setting the ratio of 2.4 to 2.8 is that the ratio is 2.
If it is smaller than 4, the matte glaze will not be obtained. Conversely, if it is larger than 2.8, the glaze will not be smooth, and crater-like depressions will occur in the glaze and the coloring of the pigment will be poor.

On the other hand, TiO ₂ /
The reason for setting the ratio of BaO to 2.2 to 2.5 is that Ti
By setting the ratio of O ₂ / BaO within this range, an intermediate semi-bright glaze can be formed well.

Various pigments can be used. Needless to say, opacifying agents such as ZrO _{2 and} other components can be appropriately contained.

[0021]

Next, embodiments of the present invention will be described in detail. Table 1
A and B glazes (A: mat glaze, B: bright glaze) having the composition shown in Table 1 were prepared, and an AB glaze (AB: semi-bright glaze) having an intermediate composition between them was prepared.

In the glaze A, the ratio of TiO ₂ / BaO is about 2.5, and in the glaze B, the ratio of TiO ₂ / B
The ratio of aO is about 2.2, TiO ₂ / B in glaze AB
The ratio of aO is about 2.3.

[0023]

[Table 1]

A button test was performed on each of the glazes A, B, and AB.
4, glaze B had an aspect ratio of 0.08, and glaze AB had an aspect ratio of 0.13. Here, the flatness is the ratio of each value on the horizontal axis and the vertical axis in FIG. FIG. 2 illustrates the result of the button test.

Next, as shown in FIG. 1, glaze A was first glazed on the surface of the tile substrate (substrate) 10 and then glaze AB was similarly glazed. Further, glaze B was spray-glazed from the surface of the glaze. Thereafter, this was fired in a roller hearth kiln at 1208 ° C. (maximum temperature) for a firing time of 42 minutes to obtain a tile having a decorative pattern of kiln modulation.

In the kiln modulation pattern, as shown in the schematic diagram of FIG. 1 (B), the glaze A, glaze B and glaze AB are exposed on the surface at the firing stage, and the glaze A and glaze B This is obtained by glaze AB having an intermediate composition and appearing randomly in glaze A and glaze B.

In the case of the method of this embodiment, the kiln modulation is not based on the reaction inside the kiln, but the kiln modulation is based on the glaze pattern of the glaze. It has the advantage of high reproducibility.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and in the present invention, the order of the glaze of the bright glaze and the mat glaze is reversed, and the mat glaze may be located on the outermost surface side. It is possible. In short, the object of the present invention can be attained if the bright glaze, the mat glaze, and the semi-bright glaze are exposed on the surface in a predetermined pattern. In addition, the present invention can be applied to tiles of various sizes, and can be embodied in variously modified forms without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating the principle of a method according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a result of a button test obtained in one embodiment of the present invention.

FIG. 3 is a diagram schematically showing the principle of a conventional manufacturing method.

[Explanation of symbols]

 10 Substrate A Matt glaze B Bright glaze AB Semi-bright glaze

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C04B 41/80-41/91

Claims (1)

(57) [Claims] (1) TiO ₂ and B in a Zegel expression
aO is TiO ₂ : 0.39 to 0.45, TiO ₂ / Ba
O: Matt glaze contained in 2.4 to 2.8 and TiO ₂
And BaO as TiO ₂ : 0.30 to 0.37, TiO ₂
/ BaO: Bright glaze contained in 1.8 to 2.3,
A their intermediate composition by _TiO 2: _0.35~0.
40, the three parties of the glaze cell <br/> Miburaito glaze containing at TiO 2 /BaO:2.2~2.5 were prepared and their glaze,
A method of manufacturing a kiln-modulated glazed tile, characterized in that each glaze is applied to the surface of the substrate so as to be exposed during firing, and then fired with a roller hearth kiln.