JPS5973483A - Hydraulic ceramic product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION After applying a glaze raw material to a base material molded with a hydraulic substance such as a mount of the present invention and firing, the hydraulic substance in the base material is hydrated and hardened. The present invention relates to a hydraulic porcelain product having a glaze layer on the surface obtained by hydrating and hardening a base material, applying a glaze raw material, and firing.

The glaze raw material used to glaze a base material made of a hydraulic material such as cement cannot be fired at a high temperature, so a so-called low-temperature glaze is used. Glaze has a large coefficient of thermal expansion, and even if efforts are made such as adjusting the raw material composition of the low-humidity glaze, it is difficult to lower the coefficient of thermal expansion of the low-temperature glaze to below 9 x 10-''IRIII, /IIIR°C. In addition, the thermal expansion coefficient of the base material is the same as that of the hydraulic material used for the base material (e.g., cement 1-.)
- It varies depending on the type and amount of aggregate etc. mixed into the hydraulic material, but is approximately within the range of 7 to 9 x 10-6 am/℃ -°C. Therefore, in most combinations of base materials and low-temperature glazes, the respective thermal expansion coefficients differ from those of the base material.
When cooled after firing, the glaze layer contracted significantly compared to the base material, causing penetration into the glaze layer. Furthermore, during cooling after firing, no penetration occurred or a thick u
Even if one person did not experience this problem, in cases where the base material is hydrated and hardened after firing, the base material expands due to hydration when the base material is hydrated and hardened, and the glaze expands due to the hydration expansion of the base material. Penetration occurred in the layer.

The present invention solves the above-mentioned conventional drawbacks by providing an intermediate layer between the base material and the glaze layer, which has the same composition as the base material and has 7 lux added thereto. That is, in the present invention, a mixture of a hydraulic substance, aggregate, and six additives (e.g., mineral fibers, thickeners, water-reducing agents, etc.) is kneaded and molded as a base material, and the surface of the base material is Add flux such as shirasu, volcanic ash, glass powder, etc. to the same composition as the base material by external grinding for 10~
A 250 wt% kneaded composition is molded to form an intermediate furnace, and a glaze raw material is further applied to the surface of the intermediate layer and fired to form a glaze layer on the surface, and then a glaze layer is formed on the surface of the intermediate layer. The hydraulic substance in the layer is hydrated and hardened, or at the time when the intermediate layer is formed on the surface of the base material, the hydraulic substance in the base material and the intermediate layer is hydrated and then the surface of the intermediate layer is cured. A glaze layer is formed on the surface by applying a glaze raw material to the surface and firing it.

In the present invention, by adding 7 lux to the intermediate layer interposed between the base material and the glaze layer, the flux is fused or sintered with the aggregate in the intermediate layer during firing, and is further bonded to the intermediate layer. Hydration expansion of the hydraulic substance that occurs when it is fused or sintered with the aggregate on the surface of the base material in contact with it, and the hydraulic substance in the base material and in the intermediate layer is hydrated and hardened after firing. This has the effect that the flux is regulated and reduced by the fused or sintered flux, and furthermore, the 7 lux near the surface of the intermediate layer co-fuses and fuses with the glaze raw material applied to the surface of the intermediate layer. Therefore, the glaze layer will not peel off even if the thermal expansion coefficients of the intermediate layer and the glaze layer differ.

Example-1 A concrete base consisting of 1 part by weight of cement and 2 parts by weight of crushed andesite was press-formed with a moisture content of 10%, and
A base material with a size of 0X100X 10+nm was obtained, and 1 part by weight of cement, 1 part by weight of silica powder, and 1 ff of glass powder!
Spray the mixture consisting of parts fi) to a layer thickness of 0.1 to 5+ am to form an intermediate layer, leave it in the air for one week, and then apply glass powder as the main component to the intermediate layer. After applying the glaze raw material and firing at a maximum temperature of 850°C for 3Q1++, it was further cured in saturated steam at 50°C for one week. As a result, no penetration was observed on the glaze surface.

Example-2 Cement - 1 part by weight, Shamono 1 - crushed product - 2 parts by weight,
A concrete base consisting of was press-formed with a moisture content of 10% to obtain a base material with a size of 50 x 1 oox 10 mm, cement - 1 part by weight, Cyto-Et pulverized material - 1 weight n1.
2 parts by weight of glass powder to a layer thickness of 0.5 parts by weight.
An intermediate layer is formed by brushing to a thickness of 1 to 5 mm, and the cement is first cured by hydration in saturated steam at 50°C for one week, and then glass powder is mainly applied on the intermediate layer. A glaze raw material was applied and fired at a maximum temperature of 850°C for 3 times.

As a result, no penetration was observed on the glaze surface.

Example-3 Cement-1fftffi part, Cytoset crushed product-2f
Flffi part, the concrete 1/base has a moisture content of 1
Press molded at 0%, 50X 100X 10111m
A base material of the size is obtained, cement 1--1 heavy hanging part, silica powder-
Spray a mixture consisting of 1 part of whitebait powder and m parts of whitebait powder to a layer thickness of 0.1 to 5+nn+.
After forming and leaving it in the air for one week, a glaze raw material mainly composed of glass powder was applied on the intermediate layer, and after being fired at a temperature of 850°C for 30 minutes, it was further heated to 50°C.
The specimens were placed in saturated steam for one week and cured. As a result, no penetration was observed on the glaze surface.

As shown in the above embodiments, the hydraulic porcelain product according to the present invention alleviates the difference in thermal expansion coefficient between the conventional low-temperature glaze and the base material by the action of the flux mixed in the intermediate layer. It exhibits many effects, such as increasing the bonding strength between the base material and the glaze layer by providing an intermediate layer that is fused or sintered with the aggregate of the membrane material and co-fused and fused with the glaze layer. .

The method for forming the base material and the intermediate layer is not limited to those described in the above examples, but may be any method such as pressure dehydration molding or general press molding. Needless to say, it may be applied later by spraying or brushing, or it may be filled with the raw material for the base material, filled with the raw stone for the intermediate layer, and then molded at once by the above-mentioned press molding method or the like.

Furthermore, although it has been stated that the composition of the intermediate layer excluding the flux is the same as that of the base material, as described in the examples (it does not have to be the same, and basically consists of a hydraulic substance such as cement and aggregate). Although it is sufficient that the base material and the intermediate layer have substantially the same composition, it is preferable to further reduce the risk of delamination etc. between the base material and the intermediate layer. becomes.

Claims (1)

[Claims] (1) An intermediate layer containing the hydraulic substance is formed on the surface of a base material made by kneading aggregate, etc. into a hydraulic substance such as cement, and the glaze raw material is applied to the surface of the intermediate layer, followed by firing. Later, the hydraulic substance in the base material and the intermediate layer is hydrated and hardened, or an intermediate layer is formed on the surface of the material and the hydraulic substance in the base material and the intermediate layer is hydrated and hardened. In a hydraulic ceramic product obtained by applying a glaze raw material to the surface of the intermediate layer and firing it after V tightening, the intermediate layer has a 10 to A hydraulic ceramic product having a glaze layer on its surface, characterized in that it is made by adding 250 wt% of flux.