JPS63149106A - Tile made of ceramic and manufacture thereof - 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 (Field of Industrial Application) The present invention relates to ceramic tiles that are attached to the surface of a base material using a bonding agent in order to improve the heat resistance, corrosion resistance, abrasion resistance, etc. of the base material. The present invention relates to a manufacturing method thereof.

(Prior Art) For example, the metal impeller of a pump that conveys slurry liquid or the like is exposed to severe wear and corrosion depending on usage conditions. For this reason, the life of the base material is increased by lining the surface of the base material with alumina-based or zirconia-based ceramic tiles that have excellent heat resistance, corrosion resistance, and abrasion resistance. Various bonding agents such as cement, mortar, organic adhesives, and metal bonding agents are used to fix such ceramic tiles to the base material surface, but conventional ceramic tiles do not bond to the base material. The force was not sufficient, and attempts have been made to improve the anchoring effect of the bonding agent by mechanically roughening the bonding surface, but this has the disadvantage that it easily peels off when the base material deforms due to thermal expansion, etc. .

(Problems to be Solved by the Invention) The purpose of the present invention is to solve these conventional problems and provide a ceramic tile that can significantly increase bonding strength to a base material such as metal, and a method for manufacturing the same. It was completed in .

(Means for Solving the Problems) The present invention provides a ceramic characterized in that a plurality of independent recesses extending inward from the joint surface and shallow grooves connecting these recesses are formed on the joint surface. A first invention relating to tiles made of tiles, in which a core in which a plurality of columnar parts having a thin lower part and a thick upper part are connected by a runner is formed of a material that can be burned, melted or sublimated at a temperature below the firing temperature of the ceramic raw material; After the core is placed on the mold surface, the ceramic raw material is filled into the mold, the core is removed by heating or left to stand, and the ceramic raw material is sintered to obtain a tile with recesses on the joint surface. and a second invention relating to a method of manufacturing a ceramic tile.

FIG. 1 shows an example of the ceramic tile of the present invention, in which (1) is a tile body made of sintered powder of partially stabilized zirconia, etc., and (2) is its joint surface. This joint surface (2) is formed with a plurality of independent recesses (3) that extend inward from the joint surface (2).

In the illustrated example, these recesses (3) are in the shape of an inverted truncated cone with an opening diameter of 3mm and a scent part diameter of 5111mm, but the number, arrangement, and cross section of the recesses (3) are different. The shape etc. are not particularly limited. In addition, in the ceramic tile of the present invention, each of the four parts (3), (
3) The ceramic tile of the present invention, which has such a structure in which shallow grooves (4) are formed between the two, has a metal base material (5) such as an impeller, as shown in FIG. It is used by pasting it on the surface with a bonding agent such as an organic adhesive, but the bonding surface (2) is formed with a plurality of independent recesses (3) that spread inward. As a result, the bonding agent penetrates deep into these recesses (3) and solidifies, creating a strong anchoring effect. Also, since these four parts (3) are independent of each other, the base material (5)
Even if the bonding agent in any of the recesses (3) were to peel off due to thermal expansion of the )
, (3) The bonding agent also enters the shallow grooves (4) that connect between the two and creates an anchor effect, making it possible to significantly increase the peel strength as shown in the data of the later examples. .

Next, to explain the method for manufacturing ceramic tiles as described above, first, the process is started using materials that can be burned or melted at a temperature below the firing temperature of the ceramic raw materials, such as wax or synthetic resin, or materials that sublimate at room temperature, such as naphthalene. A core (6) as shown in FIG. 3 is formed by a method such as injection molding. This core (6) has a plurality of columnar parts (7) that are thin at the bottom and thick at the top, and these columnar parts (7).
(7) It consists of a thin runner (8) that connects the space.
It goes without saying that the shape of the columnar portion (7) corresponds to the inner shape of the recessed portion (3) described above. Next, such a core (6) is placed on the mold surface of the bottom mold (8) as shown in FIG. 4, but it may be temporarily fixed with an adhesive if necessary. Next, the cavity formed by the lower mold (9) and the bottom mold [8] is densely filled with the ceramic raw material 00), and then compression molded by the upper mold (11) under strong pressure. In addition to using powder as the ceramic raw material, a slip-shaped raw material can also be used. Although not shown, after filling the lower mold (9) with the ceramic raw material 00), the core is placed on the ceramic raw material, and then the upper mold (I
Compression molding may be performed in I). When the molded body is then taken out of the mold and calcined, the core (6) will burn or melt, and if the core (6) is made of a sublimable material, if the molded body is left in the atmosphere, the core (6) will burn or melt. ) is sublimated and removed, so if the core (6) is further fired, the recess (3) formed by the columnar part (7) of the core (6) and the shallow groove (4) formed by the runner (8) will be removed. Ceramic tiles with . According to this method, since the core (6) is used in which the columnar parts (7) and (7) are connected by the runner (8), the core (6) can be manufactured easily and inexpensively by injection molding or the like. Moreover, there is an advantage that this runner (8) can also be utilized for tile manufacturing.

In addition to the above-mentioned materials, the core may also be made of low-melting metals such as lead and antimony, carbon powder, wood powder, etc. hardened with resin, and depending on the material, casting,
It may be formed using a compression press or the like.

(Example) Example 1 A core (6) having the shape shown in Fig. 3 was injection molded from polystyrene resin, and then placed on the mold surface of the bottom mold (8) as shown in Fig. Filled with stabilized zirconia powder. Next, the upper die (11) weighs 1500 kg/
The molded product with the core (6) is taken out of the mold and calcined at 250°C for 2 hours to form the core (6).
6) was destroyed by fire. When this was further fired at 1500°C for 4 hours, a ceramic tile with a shape shown in Figure 1 of 301 taki x 40 fin x 8 m 1 A thick and having a deep-spreading recess (3) and a shallow groove (4) was obtained. Ta. Note that the recess (3)
As mentioned above, the dimensions are an opening diameter of 3'B, an inner diameter of 5mm, a depth of 31mm, and a total of 6 pieces. This ceramic tile was attached to the surface of a bonding member (12) made of 5S41 material whose surface had been sandblasted.
It was attached using an organic adhesive (13) commercially available under the product number T. The thickness of the adhesive is 0, 5 mm and 2 mm.
The bonding area is 25 cranes x 28 fi, and the six openings are within this bonding area. A method in which this is placed on a U-shaped pedestal (14) as shown in Figure 5, and only the ceramic tile is pressed downward using an inverted U-shaped pressing tool (15) (based on ASTM C321). Peel strength was evaluated. In addition, a conventional product without recesses (3) and grooves (4) on the joint surface was also produced, and its peel strength was evaluated in the same manner. The results are shown in Table 1.

Table 1 Example 2 A core (6) of the same shape as Example 1 was molded with wax, placed on the mold surface, filled with partially stabilized zirconia powder in slip form, and slip cast. Molding was carried out by the method. Next, the molded product was calcined at 100°C for 30 minutes, the core (6) was removed, and the molded product was heated at 1500°C for 30 minutes.
A ceramic tile having the same dimensions as in Example 1 was obtained by firing for a period of time. A conventional product was also manufactured in the same manner as in Example 1, and the peel strength was measured along with the ceramic tile of Example 2. The results are shown in Table 2.

Table 2 (Effects of the Invention) As is clear from the above description, the first invention of the present application can significantly increase the bonding force to the base material, and does not peel off even when the base material is deformed due to thermal expansion etc. It is suitable for forming a strong lining layer with excellent heat resistance, corrosion resistance, and wear resistance on the surface of the base material. Further, according to the second invention of the present application, the above-mentioned ceramic tile having high peel strength can be easily and inexpensively manufactured. Therefore, the present invention can greatly contribute to the development of industry as a ceramic tile and method for manufacturing the same that solves the conventional problems.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the first invention of the present application, Fig. 2 is a partially cutaway perspective view showing the state of use thereof, and Fig. 3 is a partially cutaway perspective view of the core used in the second invention of the present application. FIG. 4 is a sectional view showing the compression molding process, and FIG. 5 is a perspective view of a peel strength measuring device. (2): Joint surface, (3): Concave portion, (4): Concave groove, (6)
: core, (7): columnar part, (8): runner. Figure 1, 9 Figure 2 Figure 5 Figure 1

Claims (1)

[Claims] 1. A plurality of independent recesses (3) on the joint surface (2) that spread inward from the joint surface (2), and a shallow groove (4) connecting these recesses (3). A ceramic tile characterized by forming. 2. The core (6) is made of a material that can be combusted, melted or sublimated at a temperature below the firing temperature of the ceramic raw material. After placing this core (6) on the mold surface, the mold is filled with a ceramic raw material, heated or left to remove the core (6), and the ceramic raw material is sintered to form a bonding surface (2). ) A method for producing a ceramic tile, characterized in that a tile is obtained having a concave portion (3).