Zirconia ceramic material and preparation method thereof

A technology of zirconia ceramics and zirconia, applied in the field of oral ceramics, can solve the problems of zirconia light-transmitting ceramics, low strength of light-transmitting ceramics, unreachable performance and other problems, and achieve excellent light transmission and high strength , The effect of stable product quality

Active Publication Date: 2013-01-16
ADVANCED TECHNOLOGY & MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Japanese patent publication number is that the patent of JP6291467A discloses a kind of Y that adopts more than 2mol% 2 o 3 and 3-20mol% TiO 2 Translucent zirconia, due to the addition of a large amount of TiO 2 , resulting in lower strength of this translucent ceramic
In addition, the zirconia sintered body obtained by the Japanese Patent Publication No. JP2050247A contains 3mol% of Y 2 o 3 and 0.25wt% Al 2 o 3 , the relative density reaches 99.8%, and the total light transmittance of 0.5mm thickness is 49%, but this method adopts hot isostatic pressing sintering, and the above performance cannot be achieved when sintering under normal pressure
[0006] So far, there have been no reports of magnesium-aluminum spinel-doped yttria-stabilized zirconia light-transmitting ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take by weighing 3mol% yttrium oxide stabilized zirconia nanopowder 998g, take by weighing 2g magnesium aluminum spinel (Al 2 o 3 MgO) nano-powder, after mixing the two, add 3wt% polyethylene glycol solution to it, to obtain a slurry with a solid content of 35wt%, fully mix it by wet ball milling at normal temperature and pressure for 18 hours, Then granulate by means of spray drying to obtain spherical particles with a particle diameter of 30 μm-80 μm. Put spherical particles into a tungsten-molybdenum mold with an inner diameter of 100mm for a hot-press sintering furnace, raise the temperature to 1450°C at a rate of 1.5°C / min under vacuum, set the pressure at 25MPa, stop heating after holding the heat for 3 hours, and cool naturally to room temperature . The sintered ceramic sintered body is processed into a sample strip with a width of 4mm±0.25mm, a thickness of 1.2mm±0.2mm, and a length of at least 20mm and a sample strip of 15×15×1.000 (mm) through grinding, cutt...

Embodiment 2

[0045] Except that the addition amount of magnesium aluminum spinel nanopowder was changed from 2g to 1g, and the addition amount of 3mol% yttria-stabilized zirconia was changed from 998g to 999g, other conditions were the same as in Example 1.

[0046] Three-point bending strength and light transmittance tests were carried out on the obtained sintered body, and the bending strength was 1097 MPa, and the light transmittance was 31%.

Embodiment 3

[0048] Except that the mold for sintering was changed from a tungsten-molybdenum mold to a graphite mold, other conditions were the same as in Example 1. The obtained sintered body was contaminated by carbon in the graphite mold, and the surface was gray. Then the sintered body was calcined at 1100° C. under normal pressure to remove carbon, and then tested for three-point bending strength and light transmittance. The available bending strength is 1045MPa, and the light transmittance is 25%.

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Abstract

The invention discloses a zirconia ceramic material and a preparation method thereof, belonging to the field of oral ceramic. The zirconia ceramic material is prepared from the following two raw materials: zirconia nanopowder containing 2-4 percent by mole of yttrium oxide and magnesium aluminate spinel nanopowder. When the thickness of the ceramic material is 1 mm, the light transmittance in a visible light range is over 25 percent and can reach 35 percent maximally, and the bending strength is over 970 MPa and can reach 1,100 MPa maximally. The zirconia ceramic material is obtained through a simple hot press sintering method, the ceramic material has better performance while the energy consumption is reduced, the process flow is simple, an obtained product is stable in quality, and the industrialization is easy.

Description

technical field [0001] The invention belongs to the field of oral cavity ceramics, and in particular relates to a zirconia ceramic material and a preparation method thereof. The zirconia ceramic material has high strength and high light transmittance. Background technique [0002] Ceramic materials are currently artificial materials that can reproduce the shape, color and luster (including fluorescence and opalescence) of natural teeth to the greatest extent. Especially zirconia (ZrO 2 ) Ceramics have significant advantages in dental restoration due to their excellent performance. Zirconia is a bioinert material that does not degrade in the oral environment, has no ion release issues and does not react with tissues and oral secretions. The implant abutment made of zirconia ceramics can achieve the best aesthetic coordination effect through color matching and gingival mucosa. However, if the abutment of the anterior dental implant is made of metal or alloy, it will cause t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/645
Inventor 梁新杰王洪友仇越秀李强周少雄杨俊英陈冬冬
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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