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A kind of silicon nitride-resin dual continuous phase composite ceramic material and its manufacturing method and application

A technology of composite ceramics and dual continuous phases, applied in the field of materials, can solve the problems of not having a rod-like grain structure and difficulty in achieving strength, etc., and achieve the effects of good machinability, simple and easy process, and simple and reliable process

Active Publication Date: 2020-02-21
哈工宁伯医疗科技泰州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although other porous ceramics can also obtain composite materials with higher strength through this process (for example, Chinese patent CN1582884A uses partially sintered oxide bodies as ceramic supports, and the bending strength of composite materials obtained after infiltration of resin is between 112.09-287.48MPa) , but because other porous ceramics do not have the rod-shaped grain structure unique to silicon nitride ceramics, it is difficult to achieve a strength of 300MPa and above

Method used

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  • A kind of silicon nitride-resin dual continuous phase composite ceramic material and its manufacturing method and application
  • A kind of silicon nitride-resin dual continuous phase composite ceramic material and its manufacturing method and application
  • A kind of silicon nitride-resin dual continuous phase composite ceramic material and its manufacturing method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) The mixed powder containing silicon nitride powder and sintering aid powder (yttrium oxide is used as sintering aid, and the sintering aid accounts for 5% of the mass of the powder) is press-molded under a pressure of 12 MPa by a compression molding process. , and then cold isostatic pressing is carried out under the pressure of 280MPa to obtain a green body;

[0055] (2) The green body was placed in a nitrogen atmosphere furnace, sintered at 1700° C. and kept for 2 hours. At this time, the flexural strength of the ceramic body was measured to be 212.2 MPa, and the porosity was 39.5%.

[0056] (3) Put the ceramic body in 5% silane coupling agent (γ-methacryloyloxypropyltrimethoxysilane) ethanol solution, soak it for 3 hours, then take it out to dry, and dry it at 120°C for 30min , to obtain a surface-treated ceramic body;

[0057] (4) The ceramic body is placed in PMMA resin, subjected to normal pressure infiltration treatment, and taken out after 24 hours.

[005...

Embodiment 2

[0062] (1) The mixed powder containing silicon nitride powder and sintering aid powder (yttrium oxide is used as the powder, and the sintering aid accounts for 5% of the mass of the powder) is prepared into a 50wt% slurry by a casting molding process. As a solvent, the silicon nitride ceramic green body is prepared by a casting molding process;

[0063] (2) The ceramic green body was placed in a nitrogen atmosphere furnace, sintered at 1700° C. and kept for 2 hours. At this time, the flexural strength of the ceramic green body was measured to be 171.75MPa, and the porosity was 49.3%. The microstructure of the obtained porous silicon nitride ceramics is as follows: figure 2 shown. from figure 2 It can be seen that the porous silicon nitride has a uniform long rod-like grain morphology and a uniform and connected porous structure. The connected porous structure is helpful for the penetration and compounding of the resin material, and the long rod-shaped grain structure is h...

Embodiment 3

[0069] (1) The mixed powder containing silicon nitride powder and sintering aid powder (yttrium oxide is used as a sintering aid, accounting for 5% of the powder mass) is prepared into a 60wt% slurry by a casting molding process. As a solvent, the silicon nitride ceramic green body is prepared by a casting molding process;

[0070] (2) The ceramic green body was placed in a nitrogen atmosphere furnace, sintered at 1700° C., and kept for 2 hours. At this time, the flexural strength of the ceramic green body was measured to be 262.25 MPa, and the porosity was 45.1%.

[0071] (3) Put the ceramic body in 5% silane coupling agent (γ-methacryloyloxypropyltrimethoxysilane) ethanol solution, soak it for 3 hours, then take it out to dry, and dry it at 120°C for 30min , to obtain a surface-treated ceramic body;

[0072] (4) The ceramic body is placed in PMMA resin, subjected to normal pressure infiltration treatment, and taken out after 24 hours.

[0073] (5) The infiltrated ceramic b...

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Abstract

The invention relates to a silicon nitride-resin dual-continuous phase composite ceramic material and a manufacturing method and application thereof. Specifically, the present invention relates to a method for manufacturing a silicon nitride-resin bicontinuous phase composite ceramic material, the method including molding, high-temperature sintering, surface treatment, infiltration treatment and resin compounding steps. The present invention also relates to the silicon nitride-resin bicontinuous phase composite ceramic material prepared by the method and the application of the composite ceramic material in manufacturing tooth or other hard tissue restoration materials. The method of the present invention has the advantages of simple process and easy operation, etc. The composite ceramic material prepared by the method has the advantages of high strength, good processability, elastic modulus and hardness similar to tooth body, etc., and is especially suitable for tooth restoration Materials, e.g. for the manufacture of crowns, veneers, inlays, onlays, but also for the restoration of other hard tissues.

Description

technical field [0001] The invention relates to the field of materials, in particular to a silicon nitride-resin dual-continuous phase composite ceramic material and a manufacturing method and application thereof. Background technique [0002] In recent years, with the improvement of people's living standards, the requirements for their own health and quality of life have gradually increased, and the demand for dental restoration materials has also gradually increased, and this demand has increased with the intensification of population aging. With a sharp increase, oral materials, as a basic subject closely related to clinical restoration and treatment, are playing an increasingly important role in oral clinical medicine. [0003] According to DENSPLY's estimates, the global market for dental materials in 2012 was US$10 billion, and it is expected that by 2030, the market for dental materials in China will reach 12 billion yuan. However, such a huge market is basically occ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/584C04B35/64C04B41/83
CPCC04B35/584C04B35/64C04B38/0003C04B41/48C04B41/83C04B2235/3217C04B2235/3225C04B2235/3232C04B2235/77C04B2235/96C04B2235/9669C04B38/0067C04B38/0074
Inventor 王锋宁聪琴曾宇平
Owner 哈工宁伯医疗科技泰州有限公司
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