JPS5898210A - Manufacture of ceramic sintered body - 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 the Invention) Akiaki Moku has developed a ceramic cutting rod with improved machinability, which has the same characteristics as the above-mentioned method for preparing molded bodies of m-sized pieces of baked clay.

(Technical background of % Ming and the line points between them) Yingzheng, which manufactures body-shaped ceramic pieces, uses ceramic wood such as alumina and suaatite with 1 to 6% acrylic 48 additive. A binder such as PVA (vinyl alcohol) is mixed with f9 using a mold.
What is required is that the molded body is pressed into the shape of 'rii4', the molded body is cut in detail with a cutting tool, etc., and then fired. However, even if the wire has a relatively single wire shape, preparing an eave mold for a small electric wire will increase the cost, so the above-mentioned equipment is necessary. It is being

However, the shape of the unsintered ceramic powder molded body as described above is maintained only by a small violet binder, so it is extremely brittle and may break when it is sent to a steel machine or a steel machine. , Also, when processing, for example, cutting a screw or making a tap! If you hit the B sword on the top, Ias will occur during processing.
Cracks occurred frequently.

In order to increase the strength of the unfired viscous ceramic #he molded body, it is possible to increase the number of binders, but simply increasing the power of the binder does not increase the strength that much, and on the contrary, it increases the convergence at the time of completion. In history, there was one point in history where the ash became too large, the field of the sintered body decreased, and the ash was not transported to the capital. A method has been considered in which the strength of the molded body is improved by freezing and crushing the molded body in r6-halafin and impregnating the outer surface of the molded body with paraffin. Due to the low f-resistance, it is difficult for paraffin to be absorbed into the ceramic, making it difficult to obtain optical reinforcing effects.

(Purpose of clarification) The present invention has been made in view of the above-mentioned problems, and it improves the wetting properties of paraffin, reduces the 15e transparency of paraffin by 7 degrees, and reduces the cutting depth by 5 degrees. An object of the present invention is to provide a method for manufacturing a ceramic sintered rod that produces an improved molded body.

(Description of the Invention) The present invention is a method of customizing the wetting of paraffin to ceramics by adding a surfactant and/or a fatty acid or its interfering amount to paraffin. do.

The paraffin used in the present invention is natural paraffin or synthetic paraffin wax, which is homogeneous in Km and has a low specific softness.

Examples of the surfactant and/or higher fatty acid or derivative thereof used in the present invention include polyoxyethylene glycol, stearic acid, oleic acid, stearic lead, M-Titanate, M-Ling silicate, etc. One or more of these can be used in combination.

The appropriate amount of these additives to be added is 0.1 to 10%; if the amount is less than this, a sufficient effect cannot be obtained, and if the amount is more than this, the effect will not be so great, so there is no point in increasing the weight.

In the present invention, the molded product that has been pressed and torn is crushed in paraffin containing the above-mentioned surfactant, impregnated with paraffin from the outside, and then cut. When processing a piece of bamboo, at least the blade to be cut has the strength to withstand 1iIII811 blades, and is given a predetermined cut of 8u.

The failure time of a ceramic powder bed molded body in bath-paraffin varies depending on the density of filling of the molded body and the ml of paraffin bath. Allow sufficient time to penetrate to the desired depth of machining.

It was cut in this way. Halafin's stated ceramic powder compacts are heated to 100 to 80% prior to firing.
It is preferable to remove paraffin and binder by heating at 00°C. Next, tA is formed at 1300 to 22 oO<0>C by methods such as furnace sintering and hot pressing.

(Example of % light) Next, an example will be described.

Refreshing 1M? An alumina powder bed containing 5% paraffin of violet as a binder was wire-formed into a round bar shape with a diameter of 3 mm and a length of 5°. This paraffin is heated at 80°C at one point.

Next, this molded body was immersed for 3 minutes in m-paraffin at 70°C with 1% polyoxyethylene glycol removed. Ten spiral grooves were formed.

As a result of the above-mentioned deformation, the paraffin had penetrated from the outer surface of the molded body toward the inside, up to about 40% of its volume. Next, the formed body after the spiral groove shape was heat-treated in a 1# atmosphere at 150°C for 30 minutes to make the impregnated paraffin ridges.Then, it was further heated to 1600°C and sintered. It became T. No carbonization caused by paraffin remained in the product after lamination. The same product,
101-
One of them was partially damaged, but with the above method, 10
Even when 0 pieces were processed, no damage occurred at all.

(Effects of the invention) As is clear from the above embodiments, according to the method of the present invention, the paraffin is repelled or wetted to the cefmic, and the chewing axillary of the molded body before the flow axis is the same as above. The machinability is improved and the product becomes less limp.

It is omitted from the excerpt.

Claims (1)

[Claims] L Wood-burning viscous ceramic powder Mokugata 1 + Unexpectedly six-faced point sill or the whole part was placed in cooled paraffin of the interface @ sex agent and/or Showeishijiri or its body. The appearance of the ceramic leprosy body is made by cutting the front fin c outer part of the body, and then firing the molded body.