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Large-scale ceramic plate

A large-scale ceramic, high-quality technology, applied in the field of ceramic plates, can solve problems that have not been realized and need to be further improved

Inactive Publication Date: 2015-09-30
TOTO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in Patent Document 3, it is proposed that by using wollastonite and aggregate in combination, the dryness after molding is improved, and cracking is suppressed by maintaining the shape of the aggregate during firing, but the stable production of thin and large ceramic plates At this point, there is room for further improvement
[0014] That is to say, even with these technologies, large-scale ceramic plates that suppress cracking and deformation and suppress quality changes caused by fluctuations in firing temperature have not been realized.

Method used

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  • Large-scale ceramic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～5

[0082] Preparation of raw material formulations

[0083] A raw material formulation was prepared by blending and mixing ceramic stone and clay as silicon-based minerals, feldspar and wollastonite as glassy minerals, and optionally talc at the contents listed in Table 1. Here, talc was not added to each raw material formulation of Examples 1-7 and Comparative Examples 1, 4, and 5. In addition, 10% by mass of talc was added to each of the raw material formulations of Comparative Examples 2 and 3, and 3% by mass of talc was added to the raw material formulation of Example 8. Then, water was added to each raw material formulation to obtain a plastic kneading clay whose moisture content was adjusted to 10% by mass or more and 25% by mass or less.

[0084] Shaping of raw material formulations

[0085] The obtained clay was molded into a cylindrical shape using an extrusion molding machine (extrusion molding machine described in Japanese Patent Application Laid-Open No. 2010-23...

Embodiment 1～6 and 8

[0090] (Examples 1-6 and 8, Comparative Examples 1-4)

[0091] Firing of moldings

[0092] Each dried body produced was heated from room temperature to a maximum temperature of 1070° C. in 20 minutes using a roller kiln, kept at the maximum temperature for 7 minutes, cooled for 13 minutes, and released from the furnace to obtain a fired body.

[0093] layering of enamel

[0094] Contains water, glass frit and kaolin as raw materials, and the coefficient of linear expansion after firing is 5.4×10 -6 The paste-like enamel whose blend of glass frit and kaolin was adjusted by / °C was adjusted to have a specific gravity of 1.7-1.9 and a viscosity of 200-350 MPa·s, and was coated on the fired body so as to have a dry thickness of 0.3-0.4 mm.

[0095] refire

[0096] Next, the fired body coated with enamel was heated from room temperature to a maximum temperature of 1050° C. in 20 minutes using a roller kiln again, maintained at the maximum temperature for 7 minutes, cooled ...

Embodiment 7、 comparative example 5

[0098] Pre-firing of moldings

[0099] The obtained dried bodies were heated from normal temperature to the highest temperature of 1050° C. in 20 minutes using a roller kiln, kept at the highest temperature for 10 minutes, cooled for 13 minutes, and released from the furnace to obtain calcined bodies.

[0100] layering of enamel

[0101] Contains water, glass frit and kaolin as raw materials, and the coefficient of linear expansion after firing is 5.4×10 -6 The paste-like enamel whose blend of glass frit and kaolin was adjusted by / °C was adjusted to a specific gravity of 1.7 to 1.9 and a viscosity of 200 to 350 MPa·s, and was applied to the calcined body so as to have a dry thickness of 0.3 to 0.4 mm.

[0102] fired

[0103] Next, the calcined body coated with enamel was heated from normal temperature to the highest temperature of 1140° C. in 10 minutes using a roller kiln, kept at the highest temperature for 10 minutes, cooled for 13 minutes, and released from the fu...

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Abstract

The invention provides a thin and large scale ceramic plate capable of preventing damages and deformation in dryness and burning state, and mass change caused by temperature change can be prevented; specifically, the large scale ceramic plate comprises the following elements: Ca element converted by CaO with above 2mass% and under 20mass%; Mg element converted by MgO between 0.1mass% and 4mass%; ALelement converted by Al2o3 under 30mass%; Si element, and CaO / MgO mass ratio is between 5-60mass%. More preferably, the large scale ceramic plate has SiO2 / CaO mass ratio between 3-30mass%.

Description

technical field [0001] The present invention relates to a large-sized ceramic plate, and specifically relates to a thin and large-sized ceramic plate that suppresses cracking and deformation, and suppresses mass changes due to fluctuations in firing temperature. Background technique [0002] Large ceramic panels that can reduce joints, simplify construction, and diversify designs have been practically used and widely used. In addition, in order to realize the manufacture of large ceramic panels suitable for exterior building materials, various proposals have been made for suppressing cracking and deformation (warpage, deformation) of large ceramic panels. [0003] For example, in order to suppress the deformation caused by molding deformation and obtain an elastic fired body, a large ceramic plate containing wollastonite has been proposed (Patent Document 1 (Japanese Patent Laid-Open Publication No. 10-236867), Patent Document 2 (Japanese Patent Laid-Open No. 2003-089570 A)...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622
Inventor 高桥治树山田茂幸今井孝次前原美夫
Owner TOTO LTD
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