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Silicon nitride-resin double continuous phase composite ceramic material and preparation method and application thereof

A technology of composite ceramics and bicontinuous phases, applied in the field of materials, can solve the problems of lack of rod-like grain structure and difficulty in achieving strength, etc., and achieve the effects of good machinability, simple process, and good stability

Active Publication Date: 2017-08-18
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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  • Silicon nitride-resin double continuous phase composite ceramic material and preparation method and application thereof
  • Silicon nitride-resin double continuous phase composite ceramic material and preparation method and application thereof
  • Silicon nitride-resin double continuous phase composite ceramic material and preparation method and application thereof

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Embodiment 1

[0054] (1) The mixed powder comprising silicon nitride powder and sintering aid powder (yttrium oxide is used as the sintering aid, and the sintering aid accounts for 5% of the mass of the powder) is press-molded under a pressure of 12 MPa using a press molding process , and then perform cold isostatic pressing under a 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 bending strength of the ceramic body was measured to be 212.2 MPa, and the porosity was 39.5%.

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

[0057] (4) Place the ceramic green body in PMMA resin, carry out atmospheric pressure infiltration treatment, and take it out ...

Embodiment 2

[0062] (1) The mixed powder comprising silicon nitride powder and sintering aid powder (as yttrium oxide, the sintering aid accounts for 5% of the mass of the powder) is formulated into a 50wt% slurry by using the pouring molding process. As a solvent, silicon nitride ceramic green bodies are then produced through a casting 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 bending strength of the ceramic body was measured to be 171.75 MPa, and the porosity was 49.3%. The microscopic morphology of the obtained porous silicon nitride ceramics is as follows: figure 2 shown. from figure 2 It can be seen that porous silicon nitride has a uniform long rod-shaped grain morphology, and a uniform and connected porous structure. The connected porous structure is conducive to the penetration and compounding of the resin material, and the long rod-shaped grain structure is conducive ...

Embodiment 3

[0069] (1) The mixed powder comprising silicon nitride powder and sintering aid powder (yttrium oxide is used as sintering aid, accounting for 5% of the mass of the powder) is prepared into a 60wt% slurry by using the pouring molding process. As a solvent, silicon nitride ceramic green bodies are then produced through a casting 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 bending strength of the ceramic body was measured to be 262.25 MPa, and the porosity was 45.1%.

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

[0072] (4) Place the ceramic green body in PMMA resin, carry out atmospheric pressure infiltration treatment, and take it out after 24 hours. ...

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Abstract

The invention relates to a silicon nitride-resin double continuous phase composite ceramic material and a preparation method and application thereof. Specifically, the invention relates to a method for preparing the silicon nitride-resin double continuous phase composite ceramic material. The method comprises the steps of shaping, high-temperature sintering, surface treatment, penetration treatment and resin compounding. The invention further relates to the silicon nitride-resin double continuous phase composite ceramic material prepared by the method and application of the compound ceramic material in making repair materials of teeth or other hard tissues. The method has the advantages of simple process and easy operation; the composite ceramic material prepared by the method has the advantages of high strength, high processibility, similar elastic modulus and hardness to the teeth, and the like, and is especially suitable for serving as a tooth repair material, for example, the material can be used for making tooth crowns, tooth veneers, tooth inlays and tooth onlays, and also can be used for repairing other hard tissues.

Description

technical field [0001] The invention relates to the field of materials, in particular to a silicon nitride-resin bicontinuous phase composite ceramic material and its manufacturing method and application. 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 oral restoration materials has also gradually increased, and this demand has increased with the aging of the population. Dental materials, as a basic subject closely related to clinical restoration and treatment, are playing an increasingly important role in clinical stomatology. [0003] According to the estimate of DENSPLY, the global dental material market size in 2012 was 10 billion US dollars, and it is estimated that by 2030, China's dental material market will reach 12 billion yuan. However, such a huge market is basically occupied by products from Germany, Italy, Japa...

Claims

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Application Information

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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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