JPS5918176A - Manufacture of ceramic structure - 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] [Technical field of invention] The present invention relates to a method for manufacturing magnetic materials.

The present invention relates to a method of manufacturing a ceramic structure, and particularly to a method of manufacturing a ceramic structure using bonding.

[Technical Background of the Invention and its Problems J] Conventionally, when manufacturing a long rectangular hollow ceramic structure, for example, it is formed through the following steps. First, an organic binder is added to ceramic material powder, mixed, sieved, and then molded.

However, the length is at most 20 to 25 m, and longer lengths are not common because of variations in size and density. Also, the extrusion molding method (those molded from two layers may bend or crack during drying, and management is difficult.
After firing, cut f6? Requires polishing.

Furthermore, the commonly used rubber press method also has the disadvantage of requiring a cutting machine similar to the above, resulting in high costs.0 [Object of the Invention] This invention (1. The purpose of the present invention is to provide a method of manufacturing a ceramic structure having a complicated shape such as a hollow or hollow structure in a simple and cost-effective manner.

[Excuse's high and low]

The present invention includes a step of molding each of a plurality of divided bodies constituting a ceramic structure, and a process of applying and pressing an aqueous solution containing powder with the same composition as the M+1 divided body to the joint surface of the nfJ 6-cut body. , FNJ hU: A method for manufacturing a ceramic structure including a step of joining by compression and sintering.

For example, the material powder is substantially the same as the ceramic structure (divided body), and the solid content is 5% methyl cellulose as a binder.
Using a powder containing 1.5% of polyethylene glycol as a lubricant, the L-shaped outer wall constituting the rectangle of the x-through hole was made into 100 pieces for each unit as a divided body of the ceramic structure.
Molded at a pressure of 0 Kf/cd.

An aqueous solution containing 10% of powder of the same composition is applied to the surface to be received, and a shape having an elongated rectangular hollow is formed by pressure bonding.

Thereafter, the joints on the outer wall were corrected using a 50% aqueous solution of powder of the same composition. The constructed compact is heated at a speed of 20'C/hour up to 30
Degrease at 0°C.

Further, the product is obtained by firing at 1400 to 1450°C in an acidic atmosphere. The product can be cut within dimensional tolerances without polishing (two people can reduce material loss and increase in man-hours).

The reason why the methyl cellulose and polyethylene glycol added to the powder were set at approximately 5% and 1.5%, respectively, is because if it is more than that, it will be difficult to degrease, and if it is less than that, the adhesion will be poor. This is because. The reason why methylcellulose is used is that it has water-retaining properties, so that when the moisture is applied, a paste-like material flows out from the molding surface and firmly adheres to the molded surface.

[! 6.Effect] Even though the same number of molded bodies can be produced as in the extrusion molding method or the C-nirubar press molding method, the number of man-hours is reduced by about 30% in the present invention, and the production can be extremely reduced to 1 Jerfs. In addition, the material cost is approximately 30%, and processing costs (cutting, polishing) are no longer necessary.

In total, approximately % of
”.

[Examples of Shiguan Ming] Example 1 Calcined powder of magnetic material that is substantially 3y2oB/5Fe20B is mixed with 5% of binder methylcellulose and 1.5% of polyethylene glycol feed lubricant as solid content. Water mixed with fat: # Add the liquid and mix and stir using a crusher. 0 The mixed powder is dried at 100°C. After drying, it is crushed using a crusher and passed through a 30-mesh sieve.

As shown in Figure 1A to C, the ground powder was put into an L-engraving mold with a diameter of 01'' based on the shrinkage rate.100
Each single item is molded by f2 at a pressure of 0 Kf/-. When each single item is coated with an aqueous solution containing 10% of the same material powder on the surface to be layered and assembled and crimped, a square hollow body of solid wood is formed. Furthermore, in order to eliminate the seams on the outer wall, we corrected it using a 50% water bath solution containing the same powder composition. The molded body constructed in this way is heated at 20℃/
The kernels are defatted at 300°C at a speed of 1 hour. The degreased material is fired at 1400 to 1450°C in an acidic atmosphere. The characteristics of the fired product are shown in Table 1 C using the extrusion molding method as well as the rubber press molding method. Add two.

The extrusion molding method was made using a conventional method by molding each single piece of magnetic material powder containing 1 unit of adhesive and lubricant at 5% and 1.5 inch, respectively, and adhering each unit. Not only does it have the same properties as the rubber press molding method, but it also eliminates the need for dimensional polishing, making it possible to obtain products at low cost.

Hereinafter, one unit is shown in Table 1. Examples 2 and 3 The results for the case of 'fc' are shown in the same manner as in Example 1 except that the shape of the divided body is as shown in Figs. 2 and 3.
' iL Table 2 and Chemical Table 3. Note that A- in Figure 3
The holder for assembly is shown.

Table 2 Table 3

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 are process diagrams illustrating the method of the present invention. (7317) Agent Patent Attorney Noriyuki Chika (1 person) 377-

Claims (1)

[Scope of Claims] A step of molding each of 'a number of divided bodies constituting a ceramic structure, and a step of applying an aqueous solution containing powder having the same composition as the divided bodies to the joint surfaces of the divided bodies and pressing them together. A method for manufacturing a ceramic structure 0, characterized in that it comprises the steps of joining by the pressure welding and temporary sintering.