JP4131886B2 - Ceramic - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[0002]
The present invention relates to porous ceramics that can be used for artificial bones and the like.
[0003]
[Prior art]
Porous ceramics have the feature of being lightweight and are manufactured as follows. That is, when a resin filler composed of particles of several tens of μm is mixed with clay and baked, the resin filler does not burn, and pores are formed in the resin filler, so that a porous of several tens of μm pores dispersed therein is formed. Can produce ceramics.
[0004]
[Problems to be solved by the invention]
However, since the porous ceramics have a large number of pores dispersed therein, they are light in weight, but have the disadvantage of poor strength, and are only used for some applications.
[0005]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a porous ceramic that has improved strength and can be used for artificial bones and the like .
[0006]
[Means for Solving the Problems]
The present invention is a rod-shaped ceramic composed of a mandrel part and an outer cylinder part around the mandrel part, wherein carbon fibers and pores are dispersed in the mandrel part and the outer cylinder part, and the mandrel part is compared with the outer cylinder part. The carbon fiber content ratio is high and the pore dispersion ratio is low, and the outer cylinder part has a lower carbon fiber content ratio than the mandrel part, and the pore dispersion ratio is high. Is exposed .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
[0008]
FIG. 1 shows a ceramic that can be used for artificial bones and the like. This rod-shaped ceramic 20 is a porous ceramic in which fine pores 2 of several tens of μm are dispersed, and has an advantage of being lightweight. And this rod-shaped ceramic 20 is comprised by the two parts from which the content ratio of the carbon fiber 3 and the pore 2 differs, ie, the mandrel part 21, and the outer cylinder part 22 around it. The carbon fibers 3 and the pores 2 are uniformly dispersed in the mandrel portion 21 and the outer cylinder portion 22, respectively. The outer cylinder portion 22 has a lower content ratio of the carbon fiber 3 and a higher dispersion ratio of the pores 2 than the mandrel portion 21, and is light and practically strong enough. It has.
[0009]
Artificial bone is now made of ceramic, iron, and other materials. However, in both cases, the bone and meat tissue are not bonded, and the meat is attached to the surface of the bone. However, if the rod-shaped ceramic 20 having the light weight and sufficient strength shown above is used for artificial bone, a large number of pores 2 are dispersed and exposed on the outer peripheral portion, and therefore, the fleshy 2 portions are fleshy. Has the advantage that the bones and muscles join together.
[0010]
An example of the manufacturing method of the said rod-shaped ceramic 20 is demonstrated.
[0011]
Two types of clay having different resin filler and carbon fiber content ratios are prepared. One is a clay with a low resin filler content ratio and a high carbon fiber content ratio, and the other is a clay with a high resin filler content ratio and a low carbon fiber content ratio. In the molding step, a clay having a low carbon fiber content ratio is formed into a plate shape, a clay having a high carbon fiber content ratio is formed into a cylindrical shape, and the cylindrical clay 24 is placed on the plate clay 23 to obtain a circular shape. A plate-shaped clay 23 is wound around the columnar clay 24 to produce a rod-shaped molded product.
[0012]
Manufacturing consists of the following steps. That is, a step of kneading by mixing clay resin filler and carbon fibers, a step of forming the clay kneaded, after molding and drying, after drying, a step of biscuit, after bisque, the step of tempering formed It consists of.
[0013]
The drying step, unglazed step, and firing step may be performed at the same temperature and time as in the case of ordinary ceramics. For example, the drying process may be performed by natural drying or forced drying, the unglazed process may be performed at 550 to 800 ° C. for 6 to 8 hours, and the firing process may be performed at 1150 to 1300 ° C. for 13 to 18 hours.
[0014]
The resin filler does not burn in the above process, and pores are formed in the resin filler portion.
[0015]
As the resin filler, for example, a hollow resin filler is used. The hollow resin filler contains a gas in resin particles of several tens of μm and is used as a filler for foamed ink and foaming material.
[0016]
An example of the hollow resin filler is shown below.
Product name: Matsumoto Microsphere F-30
Contents: Low-boiling point, hydrocarbons included with vinylidene chloride copolymer as shell wall
Thermally expandable microcapsules
Particle size is 10-20μm
Manufacturing company: Matsumoto Yushi Pharmaceutical Co., Ltd. [0017]
【The invention's effect】
As described above, according to the porous ceramic of the present invention, a lightweight ceramic having excellent strength can be provided and can be effectively used for artificial bones and the like .
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, in which (a) is a perspective view of a rod-shaped ceramic, (b) is a perspective view of a mandrel portion of the rod-shaped ceramic, and (c) is a cylindrical shape on a plate-like clay. The side view which shows the state which mounted the clay, (d) is the same top view.
[Explanation of symbols]
2 Pore 3 Carbon fiber 20 Rod ceramic 21 Mandrel part 22 Outer cylinder part 23 Plated clay 24 Columnar clay

Claims (2)

  It is a rod-shaped ceramic composed of a mandrel part and an outer cylinder part around the mandrel part, and carbon fibers and pores are dispersed in the mandrel part and the outer cylinder part. The content ratio is high, the pore dispersion ratio is low, the outer cylinder part is lower in carbon fiber content than the mandrel part, the pore dispersion ratio is high, and the pores are exposed at the outer periphery. Ceramics characterized by being. 2. The ceramic according to claim 1, wherein the carbon fibers and the pores are uniformly dispersed in each of the mandrel part and the outer cylinder part .

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