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Composite ceramic with honeycomb fiber structure and preparation method of composite ceramic

A composite ceramic and honeycomb fiber technology, applied in ceramic products, ceramic molding machines, dental preparations, etc., can solve the problems that the strength and toughness of ceramic materials cannot be taken into account, and the denture materials cannot take into account the aging and phase transformation toughness. Mechanical properties, improved aesthetics, good controllability

Active Publication Date: 2021-07-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite ceramic with a honeycomb fiber structure and its preparation in order to overcome the defects in the above-mentioned prior art that the strength and toughness of ceramic materials cannot be taken into account, and that as a denture material, no aging and phase change toughening can be taken into account. method

Method used

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  • Composite ceramic with honeycomb fiber structure and preparation method of composite ceramic
  • Composite ceramic with honeycomb fiber structure and preparation method of composite ceramic
  • Composite ceramic with honeycomb fiber structure and preparation method of composite ceramic

Examples

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preparation example Construction

[0046] The preparation method of the composite ceramic of the above-mentioned honeycomb fiber structure, comprises the following steps:

[0047] (S-1) preparing high-strength ceramic slurry and high-toughness ceramic slurry, the ceramic slurry is a slurry composed of ceramic powder, binder, sintering aid and colorant;

[0048] (S-2) Insert the paraffin core 3 into the casting mold to occupy the space, inject the high-strength ceramic slurry into the casting mold, and after the high-strength ceramic slurry is solidified, heat the paraffin core 3 to melt and flow out, forming the cell wall B and the The compartment enclosed by the cell wall B; e.g. image 3 , Figure 4 and Figure 5 As shown, the casting mold is a plaster mold, including an upper mold 1, a middle mold 2 and a lower mold 4. The upper mold 1 includes an upper mold body 1-0 and a paraffin core fixing hole 1-2 provided on the upper mold body 1-0. and the grouting port 1-1, the lower mold 4 includes a lower mold b...

Embodiment 1

[0053] A composite ceramic with a honeycomb fiber structure, specifically a composite ceramic for an all-ceramic denture, can achieve maximum coordination of strength, toughness, light transmittance and anti-aging properties; its structure is as follows figure 1 As shown, the composite ceramic of honeycomb fiber structure is composed of regular hexagonal cell body A and cell wall B. The material of cell wall B is high-strength ceramics, the material of cell body A is high-toughness ceramics, and cell body A plays the main bearing role. The cell wall mainly plays a toughening role. The combination of this "hard phase" and "soft phase" can effectively hinder crack propagation through crack deflection and bridging. The two complement each other's advantages in strength, toughness, light transmittance and anti-aging. balance in performance. In this example, the cell body A is composed of 8 mol% Y 2 O 3 -ZrO 2 (8Y-FSZ), an appropriate amount of binder, a small amount of sinterin...

Embodiment 2

[0061] This example is a honeycomb fiber composite ceramic. The difference from Example 1 is that the diameter of the regular hexagonal inscribed circle of the cell body of the composite ceramic is 2 mm. The flexural strength of the composite ceramic is 1040 MPa, and the fracture toughness is 1040 MPa. 11.7MPa.m 1 / 2 .

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Abstract

The invention relates to composite ceramic with a honeycomb fiber structure. The composite ceramic comprises a cell wall and cell bodies, wherein the cell wall is divided into a plurality of compartments; the compartments are filled with the cell bodies; and the cell wall is made of high-toughness ceramic, and the cell bodies are made of high-strength ceramic. The preparation method comprises the following steps: high-strength ceramic slurry and high-toughness ceramic slurry are prepared; a paraffin core is inserted into a casting mold for occupying, high-strength ceramic slurry is injected into the casting mold, after the high-strength ceramic slurry is solidified, heating is conducted to enable the paraffin core to be melted and flow out, and the cell wall and the compartments defined by the cell wall are formed; high-toughness ceramic slurry is injected into the casting mold to fill the spaces of the compartments, and the high-toughness ceramic slurry is cured to obtain a wet green body with a honeycomb structure; and pressing treatment and sintering treatment are conducted on the wet green body with the honeycomb structure to obtain the composite ceramic with the honeycomb fiber structure. Compared with the prior art, the composite ceramic has the advantages of good ceramic structure controllability, high strength, good toughness, high light transmittance, no aging and the like.

Description

technical field [0001] The invention relates to the field of bioceramic preparation, in particular to composite ceramics for all-ceramic dentures, and in particular to a composite ceramic with a honeycomb fiber structure. Background technique [0002] There is often a game between the strength and toughness of ceramics, and it is often impossible to have both. Especially for zirconia ceramics, because of its excellent mechanical properties, chemical properties and aesthetic effects, it has become the preferred material for all-ceramic dentures. Sufficient strength, good toughness, high light transmittance and no aging are people's long-standing pursuit of all-ceramic dentures. Solving the brittleness of zirconia ceramics, low temperature degradation from tetragonal phase to monoclinic phase in humid environment, and more realistic aesthetic effects are the focus of dentists and researchers. Zirconia ceramics not only cannot have both strength and toughness, but also cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/48C04B35/622C04B35/64A61K6/818B28B1/00B28B7/34B28B11/10
CPCC04B35/48C04B35/622C04B38/0009C04B38/0012C04B35/64B28B7/342B28B1/00B28B11/10C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/9646C04B2235/96C04B2235/6022
Inventor 何国杨林陶景超何君杰
Owner SHANGHAI JIAO TONG UNIV
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