JPH0814294A - Ceramic spring and its manufacture - Google Patents

Abstract

PURPOSE:To moderate the thermal expansion and thermal impact under high temperature environments by laminating a plate ceramic layer and a plate fibrous ceramic layer. CONSTITUTION:A ceramic sheet 3 obtained by kneading ceramic powder 1 and a binder 2 such as methyl cellulose together followed by molding into a strip 0.1-3mm in thickness by extrusion molding or doctor blade is laminated on a fibrous ceramic sheet 4 molded into a felt, paper or nit strip in the form of lint, staple, or whisker. The materials of the ceramic powder 1 and the fibrous ceramic sheet 4 contain also single components or composite components of oxide, nitride, carbide, and boride. Thus, since all the structures are formed of ceramic materials excellent in heat resistance, this ceramic spring is usable under high temperature environments, and also can be used as a stress damping member for moderating the thermal expansion or thermal impact between the mutual ceramic structures exposed to high temperature conditions or between the ceramic structure and a metal structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic spring and its manufacturing method.

[0002]

2. Description of the Related Art In recent years, the use of ceramic materials in the engineering department has attracted attention, and due to the excellent heat resistance, corrosion resistance, and wear resistance of the ceramic materials, ceramic gas turbines, ceramic turbochargers, etc. Is being developed.

In order to realize the above-mentioned ceramic gas turbine, ceramic turbocharger, etc., thermal expansion occurs between ceramic structures exposed to severe high temperature conditions or between ceramic structures and metal structures. It is necessary to use a stress cushioning member for mitigating thermal shock and the like.

[0004]

However, there is no conventional metal spring that can be used in a high temperature environment of, for example, 1000 ° C. or higher, and the ceramic gas turbine or the ceramic automobile engine is realized. It was an obstacle to the above.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a ceramic spring that can be used in a high temperature environment and a method for manufacturing the same.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a ceramic spring characterized by laminating a plate-shaped ceramic layer and a plate-shaped fibrous ceramic layer.

Further, according to the present invention, there is provided a ceramic spring characterized in that a strip-shaped ceramic layer is formed in a double or more spiral shape along the outer peripheral surface of a cylinder, and a fibrous ceramic layer is formed between overlapping ceramic layers. It is related.

Further, according to the present invention, a strip-shaped ceramic sheet formed by kneading ceramic powder and a binder and a strip-shaped fibrous ceramic sheet are superposed and wound around the outer periphery of a mandrel having a circular cross section, The present invention relates to a method for manufacturing a ceramic spring, which comprises drying a ceramic sheet and a fibrous ceramic sheet in a wound state, then vaporizing and decomposing the binder by heating, and then firing.

Further, according to the present invention, a strip-shaped ceramic layer having a plurality of ceramic ribs provided on one surface and a fibrous ceramic layer disposed between the ceramic ribs is formed in a spiral shape of two or more layers along the outer peripheral surface of the cylinder. The present invention relates to a ceramic spring, wherein ceramic ribs of adjacent ceramic layers are formed so as to be displaced from each other in the circumferential direction.

Further, according to the present invention, a ceramic sheet formed by kneading a ceramic powder and a binder into a band shape, and slits having a predetermined interval in the longitudinal direction, and a ceramic rib made of the same material as the ceramic sheet are provided in the slits. A strip-shaped fibrous ceramic sheet fitted therein is coated with a solvent on one exposed surface of the ceramic rib and a release agent is coated on the other exposed surface of the ceramic rib, or is covered with an organic thin film, and then overlapped with each other to form a circular cross section. Of the mandrel, the ceramic sheet and the fibrous ceramic sheet are dried in a state of being wound around the mandrel, and then the binder is vaporized and decomposed by heating and then fired. The present invention relates to a spring manufacturing method.

Further, according to the present invention, a plurality of ceramic ribs are provided on one surface in a radial direction at equal intervals in the circumferential direction, and a plurality of ceramic hollow disk layers in which fibrous ceramic layers are arranged between the ceramic ribs are provided adjacent to each other. The present invention relates to a ceramic spring, wherein the ceramic ribs of the disc layers are stacked with a predetermined angle offset in the circumferential direction so that the ceramic ribs are staggered.

Further, the present invention has a ceramic hollow disk formed by kneading ceramic powder and a binder, and slits extending in the radial direction at circumferentially equidistant positions, and the slits are made of the same material as the ceramic hollow disk. A fibrous ceramic hollow disk into which a ceramic rib is fitted, and a solvent is applied to one exposed surface of the ceramic rib and a release agent is applied to the other exposed surface of the ceramic rib or an organic thin film is applied to the exposed surface, and then the adjoining adjoining A plurality of layers are alternately stacked so that the slits of the fibrous ceramic hollow disk are staggered in the circumferential direction, and a laminated body is formed. The laminated body is dried while being pressed flatly with an appropriate pressure, and then the binder is vaporized and decomposed by heating. However, the present invention relates to a method for manufacturing a ceramic spring, which is characterized by firing after that.

[0013]

In the present invention, all the components are made of a ceramic material having excellent heat resistance and have a multi-layered structure in which fibrous ceramic layers are separated from each other, so that the heat insulating effect is high when used in a high temperature environment. The stress is low and the sealing property is obtained.

Further, in the present invention, since it is formed in a spiral shape, elastic displacement in the radial direction can be generated, friction due to relative displacement between the ceramic layer and the fibrous ceramic layer is added, and the function of the damper is achieved. Occurs.

Further, according to the present invention, a spiral ceramic spring can be manufactured very easily and can be obtained as a finished product which requires no post-processing.

Further, in the present invention, since the ceramic ribs of the ceramic layer are displaced from each other in the circumferential direction, the ceramic ribs have not only heat resistance and heat insulating effect but also function as a cushioning component.

Further, according to the present invention, a spiral ceramic spring having a ceramic rib can be manufactured very easily, and a finished product requiring no post-processing can be obtained.

Further, according to the present invention, since the ceramic ribs of the ceramic hollow disk layers are laminated so as to be offset from each other in the circumferential direction so that they are staggered, a heat-resistant and heat-insulating spring having a uniform spring constant in the laminating direction. Is obtained.

Further, according to the present invention, a disk-shaped ceramic spring can be manufactured very easily and can be obtained as a finished product which requires no post-processing.

[0020]

Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG. 2, the ceramic powder 1 and the binder 2 such as methylcellulose are kneaded and extruded or formed by a doctor blade into a belt-shaped ceramic sheet 3 having a thickness of 0.1 to 3 mm, and long fibers, A mandrel 5 having a circular cross section is laminated with a fibrous ceramic sheet 4 formed in the form of felt, paper, or knit-like strip in the form of short fibers, whiskers, etc. so that the ceramic sheet 3 side becomes the inner diameter side as shown in FIG. Is wound around the outer periphery of the ceramic sheet 3 so that the outer diameter side also becomes the ceramic sheet 3, and the end portions of the wound ceramic sheet 3 and the fibrous ceramic sheet 4 are fixed by bands or the like not shown. At this time, the surface of the mandrel 5 is coated with a reaction inhibitor for preventing the bonding with the ceramic sheet 3 to form a film.

The above-mentioned ceramic powder 1 and fibrous ceramic sheet 4 are made of oxides, nitrides, carbides, and borides, and the mandrel 5 is decomposed in the firing step described later. It is a non-ceramic, and is a solid cylindrical or hollow cylindrical shaped sintered body made of oxide, nitride, carbide, or boride alone or as a composite.

A ceramic sheet 3 and a fibrous ceramic sheet 4 are wound around the mandrel 5 in multiple layers, heated and dried as shown in FIG. 3, and then placed in a heating furnace (not shown) in an air atmosphere or the like at about 800.degree. By heating to
The binder 2 contained in the ceramic sheet 3 is vaporized and decomposed to be removed, and the mandrel 5 is removed after being gradually cooled. A ceramic spiral degreased molded body in which the ceramic sheet 3 and the fibrous ceramic sheet 4 are integrally stacked. Further, the degreased molded body is placed in another heating furnace or the like in an inert atmosphere (not shown), and the temperature is higher than the above (about 1500 ° C. when the ceramic is alumina, and 1 degree when the silicon nitride is used).
When heated and baked at about 800 ° C.), a ceramic spiral shape capable of elastically displacing in the radial direction is obtained by integrally stacking the ceramic layer 3A and the fibrous ceramic layer 4A as shown in FIG. The spring 6 is manufactured.

When a ceramic sintered body is used for the mandrel 5, the inner diameter of the ceramic spiral spring 6 is fired to have substantially the same size as the outer diameter of the mandrel 5, and the outer diameter of the ceramic spiral spring 6 contracts during firing. . When the molded body obtained by kneading the ceramic powder and the binder is used for the mandrel 5, the same shrinkage as that of the ceramic sheet 3 is exhibited by firing, but the firing shrinkage rate is known in both cases, so that after firing The dimensions of the ceramic spiral spring 6 can be controlled.

Here, the firing may be ordinary pressureless sintering or pressure sintering, but it is preferable that the whole is wrapped with a suitable filling powder and heated at a uniform temperature. Further, the mandrel 5 and the ceramic spiral spring 6 can be separated from each other after firing by the effect of the reaction-preventing film previously coated on the surface of the mandrel 5 and the spring effect of the ceramic spiral spring 6.

The ceramic spiral spring 6 of FIG. 1 manufactured as described above has a ceramic layer 3A and a fibrous ceramic layer 4A which are superposed on each other. Can be used as a stress buffering member to reduce thermal expansion, thermal shock, etc. between ceramic structures exposed to severe high temperature conditions or between ceramic structures and metal structures. can do.

Further, the ceramic spiral spring 6 is
Since it has a multi-layer structure in which the fibrous ceramic layers 4A are separated from each other, it has a high heat insulating effect and is highly useful, for example, when it is used between a ceramic structure and a metal structure having a temperature difference.

Further, the ceramic spiral spring 6 is
Since the spring rigidity can be arbitrarily set by changing the thickness, the number of turns, etc. of the ceramic layer 3A, it is extremely easy to design the spring rigidity.

Further, the ceramic spiral spring 6 is
Has a friction damping function.

That is, when the ceramic spiral spring 6 is elastically displaced in the radial direction, the overlapping ceramic layers 3A.
A relative displacement in the circumferential direction is secondarily generated between them. On this occasion,
The kinetic energy acting on the ceramic spiral spring 6 is attenuated by the frictional force between the fibers of the fibrous ceramic layer 4A and the frictional force due to the relative displacement between the ceramic layer 3A and the fibrous ceramic layer 4A.

Further, according to the manufacturing method described above, the ceramic spiral spring 6 having various effects as described above can be manufactured very easily, so that the mass productivity is high.
Moreover, the manufacturing cost is low because it can be obtained as a finished product that requires no post-processing.

4 to 7 show another embodiment of the present invention. As shown in FIG. 4, a ceramic powder 1 and a binder 2 are provided.
And a ceramic sheet 3 formed into a band shape by kneading with and a rectangular slit 7 at a required interval L in the longitudinal direction,
Further, a fibrous ceramic sheet 4'having a ceramic rib 8 of the same material as that of the ceramic sheet 3 fitted in the slit 7 is provided on one exposed surface 8a of the ceramic rib 8 as shown in FIG. 9 and the other exposed surface 8b is coated with a mold release agent 10 such as silicon or Teflon or covered with a thin plastic film 11 (organic thin film), and they are overlapped with each other, and as shown in FIG. The mandrel 5 is wound around the mandrel 5 in multiple layers, and the end portions of the wound ceramic sheet 3 and the fibrous ceramic sheet 4'are fixed by a band or the like not shown.

Here, the fibrous ceramic sheet 4 '
The interval L of the slits 7 is not necessarily constant, and when the ceramic sheet 3 and the fibrous ceramic sheet 4 ′ are superposed and wound on the mandrel 5, the fibrous ceramics adjacent to each other with the ceramic sheet 3 sandwiched therebetween in the radial direction. An appropriate interval L is set so that the slits 7 of the sheets 4'are staggered.

Next, after the ceramic sheet 3 and the fibrous ceramic sheet 4 are heated and dried in the state of FIG. 6, the ceramic sheet 3 and the ceramic sheet 3 and the ceramic sheet 3 are heated by placing them in a heating furnace not shown in the air atmosphere. When the binder 2 included in the rib 8 is vaporized and decomposed and removed, and the mandrel 5 is removed after being gradually cooled, the binder 2 is bonded to one of the facing surfaces 3a of the ceramic sheets 3 adjacent in the radial direction,
In addition, a plurality of ceramic ribs 8 are arranged so as to be staggered from each other so as to be adjacent to each other with the ceramic sheet 3 interposed therebetween in the radial direction, and the fibrous ceramic sheet 4 ′ is arranged between the ceramic ribs 8. A degreased molded body of the spiral-shaped ceramic sheet 3 thus obtained is obtained, and the degreased molded body is placed in another heating furnace or the like in an inert atmosphere (not shown) and heated at a temperature higher than the above to be fired. As shown, a ceramic spiral spring 6'which is elastically deformable in the radial direction is manufactured by the sintered body of the spiral ceramic layer 3A, the ceramic ribs 8 and the fibrous ceramic layer 4A 'which have been toughened by the sintering. .

In the case of this ceramic spiral spring 6 ', in addition to having the elastic displacement function in the radial direction as in the ceramic spiral spring 6 of FIGS. 1 to 3, the ceramic rib 8 is provided. Has a friction damping function.

That is, when the ceramic spiral spring 6'is elastically displaced in the radial direction, the overlapping ceramic layers 3 '
A relative displacement in the circumferential direction is secondarily generated between A. At this time, a plurality of ceramic ribs 8 joined to one facing surface 3a of the ceramic layer 3A adjacent in the radial direction slidably contact the other facing surface 3b, and the frictional force acts on the ceramic spiral spring 6 '. The kinetic energy is attenuated, and the motion acting on the ceramic spiral spring 6'is also caused by the frictional force between the fibers of the fibrous ceramic layer 4A 'and the frictional force due to the relative displacement between the ceramic layer 3A and the fibrous ceramic layer 4A'. Energy is attenuated.

FIGS. 8 to 13 show still another embodiment of the present invention. As shown in FIG. 8, a ceramic sheet formed by kneading a ceramic powder 1 and a binder 2 such as methylcellulose and extruding into a sheet shape. A ceramic hollow disk 13 is formed by punching 12 out.

Further, as shown in FIG. 9, the fibrous ceramic sheet 14 formed in the form of felt, paper, or knit in the form of long fibers, short fibers, whiskers or the like is punched to obtain equal intervals in the circumferential direction. A fibrous ceramic hollow disk 16 having a slit 15 extending in the radial direction is formed at a position, and the ceramic hollow disk 1 is formed in the slit 15.
The ceramic rib 17 made of the same material as 3 is fitted.

Here, the fibrous ceramic hollow disk 1 is used.
Dimension r from the center O of 6 to the outer end of the slit 15
The dimension r ₂ from ₁ to the inner end of the slit 15 is set to be equal to the outer diameter R ₁ and the inner diameter R _{2 of the} ceramic hollow disk 13, respectively.

Then, as shown in FIG. 10, the exposed surface 17a of the ceramic rib 17 is coated with a solvent 9 such as water, and then the ceramic hollow disk 13 and the fibrous ceramic hollow disk 16 are formed as shown in FIG. A plurality of layers are alternately stacked to form a laminated body 18, and the laminated body 18 is provided with a holding plate 19,
By pressing flatly with an appropriate pressing force by 19,
The ceramic rib 17 and the ceramic hollow disk 13 are joined together to integrate the laminated body 18.

At this time, the slits 15 between the fibrous ceramic hollow discs 16 that are adjacent to each other with the ceramic hollow disc 13 sandwiched therebetween are arranged so as to be offset by θ angles in the circumferential direction as shown in FIG. To do. For example,
In the illustrated example, one fibrous ceramic hollow disk 16 has eight
Since the individual slits 15 are formed at equal intervals, the adjacent fibrous ceramic hollow disks 16 are stacked by shifting the angle by 22.5 degrees.

Next, as shown in FIG. 11, the laminated body 18 is heated by pressing it flat with the pressing plates 19 and 19 while being pressed flat and dried, and then placed in a heating furnace (not shown) in an air atmosphere or the like at 800 ° C. By heating to a certain degree, the binders 2 contained in the ceramic hollow disk 13 and the ceramic rib 17 are vaporized and removed, and then placed in another heating furnace (not shown) in an inert atmosphere or the like. When the ceramic hollow disk 13 and the ceramic rib 17 are heated at a higher temperature (about 1500 ° C. when the ceramic is alumina and about 1800 ° C. when the silicon nitride is used), the circumferential sectional development view of FIG. 13 is shown. like,
The fibrous ceramic layer 16A is arranged between the ceramic ribs 17 of the ceramic hollow disk layer 13A that has been fired to obtain toughness, and a plurality of circumferential positions of the ceramic hollow disk layer 13A can be elastically deformed alternately in each adjacent layer, A ceramic hollow disk laminated spring 20 having a uniform spring constant in the laminating direction as a whole is manufactured.

The ceramic hollow disk laminated spring 20 manufactured as described above can be used in a high temperature environment because all the constituents are made of a ceramic material having excellent heat resistance, so that it can be used under severe high temperature conditions. It can be used as a stress buffer member for relaxing axial thermal expansion and thermal shock between the ceramic structures exposed to each other or between the ceramic structure and the metal structure.

Further, the ceramic hollow disk laminated spring 2
Since 0 has a multiple structure in which the fibrous ceramic layers 16A are separated from each other, it has a high heat insulating effect and is highly useful, for example, when it is used between a ceramic structure and a metal structure having a temperature difference.

Further, the ceramic hollow disk laminated spring 20
Since the ceramic hollow disk layers 13A and the ceramic ribs 17 have a thin structure, the thermal stress is low and the durability is high.

Further, the ceramic hollow disk laminated spring 2
In the case of 0, the spring rigidity can be arbitrarily set by changing the number of laminated ceramic hollow disk layers 13A, so that the spring rigidity can be designed very easily.

Further, according to the manufacturing method described above, the ceramic hollow disk laminated spring 20 having various effects as described above can be manufactured very easily, so that the mass productivity is high and no post-processing is required. Since it can be obtained as a finished product, the manufacturing cost is low.

[0048]

According to the invention of claim 1, since all the constituents are ceramic materials excellent in heat resistance, they can be used in a high temperature environment, and ceramic structures exposed to severe high temperature conditions In between, or between the ceramic structure and the metal structure, it can be used as a stress buffering member for alleviating thermal expansion, thermal shock and the like.

Further, since the fibrous ceramic layer is interposed between the plate-shaped ceramic layers, the heat insulating effect is high, and the kinetic energy damping effect due to the frictional force between the fibers is effective as a stress buffer component.

The invention of claim 2 can be used in a high temperature environment because all the constituents are made of a ceramic material having excellent heat resistance, and a band-shaped fibrous ceramic layer is formed between the band-shaped ceramic layers. Because it has a multiple structure,
Since it has a high heat insulation effect and a thin structure, it has low thermal stress and high durability, and the spring rigidity can be set arbitrarily by changing the thickness and number of turns of the ceramic layer. The design of the spring stiffness in the radial direction is extremely easy.

According to the invention of claim 3, the ceramic spring according to claim 2 having various effects as described above can be manufactured very easily, so that it is highly mass producible and can be obtained as a finished product which requires no post-processing. As a result, the production cost is low.

According to the invention of claim 4, in addition to the same effect as the invention of claim 2, a friction damping function by the ceramic ribs and a kinetic energy damping effect by the frictional force between the fibers of the fibrous ceramic can be expected. .

According to the invention of claim 5, the ceramic spring according to claim 4 having various effects as described above can be manufactured very easily, so that the mass productivity is high, and it is obtained as a finished product which requires no post-processing. As a result, the production cost is low.

The invention of claim 6 can be used in a high temperature environment because all the constituents are made of a ceramic material having excellent heat resistance, and a multi-layered structure in which fibrous ceramic layers are formed between ceramic hollow disk layers. Since it has a structure, it has a high heat insulation effect, and since it has a thin structure, it has low thermal stress,
It has a high durability effect, and the spring rigidity can be arbitrarily set by changing the number of laminated ceramic hollow disks, so that the spring rigidity can be designed very easily.

According to the invention of claim 7, since the ceramic spring according to claim 6 having various effects as described above can be manufactured very easily, the mass productivity is high, and it is obtained as a finished product which requires no post-processing. As a result, the production cost is low.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a ceramic spring of the present invention.

FIG. 2 is a perspective view of a ceramic sheet and a fibrous ceramic sheet according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the ceramic sheet and the fibrous ceramic sheet of FIG. 2 are overlapped and wound around a mandrel.

FIG. 4 is a perspective view of a ceramic sheet and a fibrous ceramic sheet according to another embodiment of the present invention.

5 is an enlarged cross-sectional view of a ceramic rib fitted in a slit of the fibrous ceramic sheet of FIG.

6 is a cross-sectional view showing a state in which the ceramic sheet and the fibrous ceramic sheet of FIG. 4 are superposed and wound around a mandrel.

FIG. 7 is a perspective view showing a state where the ceramic spring shown in FIG. 6 is completed.

FIG. 8 is a plan view of a ceramic hollow disk according to still another embodiment of the present invention.

FIG. 9 is a plan view of a fibrous ceramic hollow disk according to still another embodiment of the present invention.

10 is an enlarged perspective view of a ceramic rib fitted in a slit of the fibrous ceramic hollow disk of FIG.

FIG. 11 is a side view showing a laminated body according to still another embodiment of the present invention with a part thereof cut away.

FIG. 12 is a plan view showing a laminated state of fibrous ceramic hollow disks.

13 is a development view of the circumferential cross section of FIG. 12 in a state where the ceramic hollow disk laminated spring of FIG. 12 is completed.

[Explanation of symbols]

 1 Ceramic Powder 2 Binder 3 Ceramic Sheet 3A Ceramic Layer 4, 4'Fibrous Ceramic Sheet 4A Fibrous Ceramic Layer 4A 'Fiber Ceramic Layer 5 Mandrel 7 Slit 8 Ceramic Rib 9 Solvent 10 Release Agent 11 Plastic Film (Organic Thin Film) 12 Ceramic Sheet 13 Ceramic Hollow Disc 13A Ceramic Hollow Disc Layer 14 Fibrous Ceramic Sheet 15 Slit 16 Fibrous Ceramic Hollow Disc 16A Fibrous Ceramic Layer 17 Ceramic Rib 18 Laminate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Miyahara 3-15-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Technical Research Institute

Claims (7)

[Claims] 1. A ceramic spring, wherein a plate-shaped ceramic layer and a plate-shaped fibrous ceramic layer are laminated. 2. A ceramic spring, characterized in that a strip-shaped ceramic layer is formed in a double or more spiral shape along an outer peripheral surface of a cylinder, and a strip-shaped fibrous ceramic layer is formed between overlapping ceramic layers. 3. A ceramic sheet formed by kneading ceramic powder and a binder into a band shape and a fibrous ceramic sheet in a band shape are superposed and wound around the outer periphery of a mandrel having a circular cross section, and wound around the mandrel. A method for producing a ceramic spring, characterized in that the ceramic sheet and the fibrous ceramic sheet are dried in this state, then the binder is vaporized and decomposed by heating, and then fired. 4. A ceramic strip having a plurality of ceramic ribs provided on one surface and a fibrous ceramic layer disposed between the ceramic ribs, the ceramic strips being adjacent to each other in a double or more spiral shape along the outer peripheral surface of the cylinder. A ceramic spring, wherein the ceramic ribs of the layers are formed so as to be displaced from each other in the circumferential direction. 5. A ceramic sheet formed by kneading ceramic powder and a binder into a strip shape, and slits having a predetermined interval in the longitudinal direction, and ceramic ribs made of the same material as the ceramic sheet are fitted into the slits. A strip-shaped fibrous ceramic sheet is coated with a solvent on one exposed surface of the ceramic rib and a release agent is coated on the other exposed surface of the ceramic rib, or is covered with an organic thin film, and then overlapped to form a circular cross-section mandrel. Manufacturing of a ceramic spring characterized in that it is wound around the outer periphery in multiple layers, the ceramic sheet and the fibrous ceramic sheet are dried while being wound around the mandrel, and then the binder is vaporized and decomposed by heating and then fired. Method. 6. A plurality of ceramic hollow disk layers in which a plurality of ceramic ribs are provided radially on one surface at equal intervals in the circumferential direction and fibrous ceramic layers are arranged between the ceramic ribs, and adjacent ceramic hollow disk layers are provided. A ceramic spring, wherein the ceramic ribs are laminated with a predetermined angle offset in the circumferential direction so that the ceramic ribs are staggered. 7. A ceramic hollow disk formed by kneading a ceramic powder and a binder, and slits extending in the radial direction at circumferentially equidistant positions, and ceramic ribs made of the same material as the ceramic hollow disk are provided in the slits. The fibrous ceramic hollow disk and the fibrous ceramic adjacent to each other after applying a solvent to one exposed surface of the ceramic rib and a mold release agent or an organic thin film on the other exposed surface of the ceramic rib. A plurality of layers are alternately stacked such that the slits of the hollow discs are staggered in the circumferential direction to form a laminated body, and the laminated body is dried while being held flat with an appropriate pressing force, and then the binder is vaporized and decomposed by heating, A method of manufacturing a ceramic spring, which comprises firing after that.