JPS62223041A - Production of decorative inorganic substrate - Google Patents

Abstract

PURPOSE:To produce an excellent decorative inorganic substrate without deteriorating materials of plate glass and board material, by fusing both with specific frit powder fusing the plate glass for forming a decorating surface to an inorganic substrate and integrating to produce an inorganic material having the glass plate decorative surface. CONSTITUTION:Window glass, colored glass, tempered glass, etc., forming a decorative surface is bonded to a board material, e.g. alumina porcelain board, cement formed board, calcium silicate board, tile body, inorganic expanded board, other inorganic heat-resistant building boards, etc., having <=20X10<-6>/ deg.C difference in thermal expansion coefficient from the above-mentioned board material to produce a decorative inorganic substrate. In the process, frit powder having an intermediate value of the thermal expansion coefficient between those of both plate and board materials and melting point >=50 deg.C lower than the glass material is placed between both plate and board materials in 0.005-0.20g/cm<2> amount used and both materials are laminated and heated at a temperature below the deformation temperature of the glass plate material. The frit is fused to firmly bond the glass plate material to the inorganic board material without damaging by the difference in thermal expansion coefficient.

Description

[Detailed description of the invention] Field of use The present invention relates to a method for manufacturing a plate-shaped glass decorative inorganic substrate.

Specifically, the present invention relates to a method of manufacturing an inorganic material having a glass plate-like decorative surface by effectively fusing and integrating a plate glass forming a decorative surface and an inorganic base material generally having a different number of thermal expansion threads from the glass. . Products according to the invention are useful in construction materials and related fields that utilize their glassy decorative surfaces.

BACKGROUND ART Surface decorations in which glaze is applied to the surfaces of ceramic tiles, cement molded boards, etc. have been known. Approximately 1cm thick depending on the glaze
Although it is possible to create a glassy surface with a thickness less than that, it is difficult to form a glassy surface with a thickness greater than that due to flow of the glaze and/or devitrification. Therefore, due to the thin glassy surface, decorative properties such as depth, texture, and three-dimensional effect were unsatisfactory.

Previously, the applicant overlaid a glass plate and a specific tile substrate having a comparable coefficient of thermal expansion.

Apply glass powder to the interface between the two if necessary.

We proposed a method of integrating the glass plates by heating them at a temperature above their softening point and below their melting point. However, when trying to apply this method to other inorganic substrates, the substrate is limited to substrates with a coefficient of thermal expansion comparable to that of glass plates, and because the heating temperature is high, it is difficult to apply this method to substrates other than tiles. There were problems such as thermal deterioration and/or deformation. Furthermore, it is generally difficult to significantly change the thermal expansion coefficient of an inorganic plate-like material compositionally. In addition, even in the case of tiles, it is inconvenient to prepare the above-mentioned specific tile bases due to recent raw material conditions.

The main object of the present invention is to apply plate glass decorations with depth, texture, three-dimensional effect, etc. to the surface of a wide range of inorganic substrates without substantially degrading the substrate.

The present inventors focused on the fact that a frit with a relatively low melting point can be prepared and that the coefficient of thermal expansion is relatively easy to adjust. With a frit of lower melting point than the glass with the coefficient of value between.

By heating and fusing at a relatively low temperature and relaxing the strain caused by the difference in thermal expansion between the two materials with the frit layer,
Solved the above problems.

That is, according to the present invention, an inorganic base material and a plate glass having a back surface having substantially the same shape as the front surface of the base material have a coefficient of thermal expansion between the coefficients of thermal expansion of the two materials. Frit powder having a melting point 50'C or more lower than that of the glass material is then added to a square cm; h area of about 0.00
5 to about 0.20 grams are applied substantially uniformly in layers and heated to a temperature above the substantial melting temperature of the frit and below the substantial thermal transformation temperature of the sheet glass. It is characterized by being fused and integrated. A method of making a plate glass decorative inorganic substrate is provided.

Furthermore, in the above manufacturing method, if the difference in linear thermal expansion coefficient between the inorganic base material and the sheet glass is within about 4x lo-'/'C, preferably within about 2Xto-'/'C, the difference in linear thermal expansion coefficient is generally achieved. A product having a structure in which the sheet glass layer has substantially no penetrations is obtained. Furthermore, when using two materials in which the difference in coefficient of linear thermal expansion between the two materials is about 4 x 10'' to about 20 A product with a structure in which the glass layer has minute penetrations and has practical decorative strength is obtained.If the difference in the coefficient exceeds about 20 x 10-6/'C, the strength of the glass layer with one penetration deteriorates. There is fear.

The inorganic base material and sheet glass used in the present invention are:
Generally has a planar or curved surface. Furthermore, the surface of the inorganic base material to be decorated and the back surface of the sheet glass overlaid on the surface have surfaces of substantially the same shape. The thickness of the plate glass is usually about 11 or more in thickness in order to exhibit a decorative effect different from that of the glaze layer. Generally, commercially available products having a thickness of around 3 ounces are advantageously used.

Examples of the inorganic base material include an alumina porcelain board, a cement molded board, a calcium silicate board, a tile base, an inorganic foam board, and other heat-resistant building material boards 1. As sheet glass, commercially available window glass plate 9 colored glass base 1 tempered glass plate 2
etc. are exemplified.

As the frit, a frit that is generally mixed into a glaze or the like can be used. The frit powder has a melting point lower than that of the material of the sheet glass by about 50° C. or more, preferably about 100° C. or more. The amount of frit powder used is square CrIM
The amount ranges from about 0.005 to about 0.2 grams per gram, and usually about 0.02 to about O.OS grams. 9. The frit must be applied substantially uniformly to the interface of both materials. Therefore, it is generally preferred to apply the frit powder as a slurry and dry it after application. It is also a preferred embodiment to add as small a amount of colloidal mineral powder as possible in order to easily form a slurry.

Generally, the IJ 7 powder is applied substantially uniformly to the surface of an inorganic substrate, a sheet glass is placed thereon, and the powder is heated and fused. The heating temperature is higher than the substantial melting temperature of the frit and lower than the substantial thermal distortion temperature of the sheet glass, and the heating time is about 1 to 2 hours. In addition,
The conventional technique described above generally requires about 4 hours at about 800°C.

The present invention also has the effect of significantly shortening the heating time. Below the heat distortion temperature mentioned above means a temperature between the softening temperature and the melting temperature, at which the plate glass does not lose its plate shape.

Functions and Effects The main functions of the present invention are that although the coefficients of thermal expansion of the inorganic substrate and the sheet glass are generally quite different, the coefficient of thermal expansion of the glass is sandwiched between the coefficients of the two materials. It is believed that by fusing and integrating both materials using a frit powder with a lower melting point than the material, the strain caused by the difference in thermal expansion between the two materials is alleviated by a frit layer having a thermal expansion coefficient between the two materials. Ru. Therefore, the effect is obtained that the inorganic base material is not substantially thermally degraded and the two are firmly fused and integrated despite the difference in thermal expansion. Furthermore, depending on the difference in the thermal expansion coefficients of the two materials used, products with no penetration in the sheet glass layer and products with decorative penetration patterns and practical strength can be obtained through a simple process. is achieved.

Examples In the following examples, the coefficient of linear thermal expansion is approximately 10 x 1 o-'
A commercially available plate glass having a thickness of 3 mm and having a softening point of about 730° C. was used, which was cut into 951 square pieces. As a frit powder, the coefficient is about c
+xto-/'c, the softening point is about 580°C, and the approximate composition is 5i02. Al2O3, B2O5,
Na2O, Cab.

A frit containing MgO is placed between the sheet glass and the substrate with a square c
Approximately 0.06 grams per nr was applied substantially uniformly. Heating is done using a one-box Kanthal furnace at a heating rate of 10.
The firing was carried out at °C/min and allowed to cool after firing.

Example 1 As an inorganic base material, the linear thermal expansion coefficient is approximately 6xto-%''C
A 1001 square dyed earth ceramic tile was used. The materials were heated in layers at 800° C. for about 90 minutes and allowed to cool.

A glass decorative tile with fine penetrations and good welding was obtained.

For comparison, tests were conducted under the same conditions without using frit and with glass powder instead, but both resulted in poor fusion.

Example 2 Similarly, a plain tile having a linear thermal expansion coefficient of about 8XIO''6/''C was heated at 800°C for about 60 minutes.

It was left to cool. A glass decorative tile with good fusion bonding and no penetration was obtained.

Example 3 An asbestos cement silical board and a zonolite board were used as the inorganic base material and heated at 700° C. for about 90 minutes and allowed to cool. Glass decorative tiles with no penetration and good fusion bonding were obtained.

Example 4 In the same manner, a cement silica sand molded plate was heated at 700°C for about 60 minutes and allowed to cool. A product with good welding and no penetration was obtained.

Example 5 The same procedure as in Example 4 was carried out using a cement chamotte molded plate. A product with fine penetrations and good welding was obtained.

Example 6 An unglazed alumina feldspar tile base was heated at about 800° C. for about 60 minutes and allowed to cool. A product with fine penetrations and good welding was obtained.

Claims (1)

[Claims] (1) Using an inorganic base material having a linear thermal expansion coefficient difference of within 20 x 10^-^6/°C with plate glass and the material of the glass, the surface of the inorganic base material to be decorated and the base A frit powder having a coefficient of thermal expansion between the coefficients of thermal expansion of both materials and a melting point lower than the material of the glass by 50°C or more is placed between the plate glass having a back surface having substantially the same shape as the material surface. 0.005 to 0.2 grams per square centimeter of the material in a substantially uniform manner, and the material is layered to a temperature above the substantial melting temperature of the frit and below the substantial heat distortion temperature of the sheet glass. A method for manufacturing a plate-shaped glass decorative inorganic base material, which is characterized by heating and fusing and integrating.