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Dental alumina-zirconia eutectic ceramic rod and preparation method thereof

A technology of dental ceramics and eutectic ceramics, which is applied in the field of stomatology and can solve problems such as failure and aging of zirconia ceramics

Active Publication Date: 2022-03-29
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0013] In order to solve the problem that the aging phenomenon of zirconia ceramics in the hydrothermal environment causes its failure in clinical application, the present invention proposes an anti-aging dental ceramic material and its preparation method

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  • Dental alumina-zirconia eutectic ceramic rod and preparation method thereof
  • Dental alumina-zirconia eutectic ceramic rod and preparation method thereof
  • Dental alumina-zirconia eutectic ceramic rod and preparation method thereof

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Embodiment Construction

[0045] The invention is an anti-aging alumina-zirconia eutectic ceramic rod, which is composed of alumina and zirconia, wherein the alumina content is 57.42%, and the zirconia content is 42.58%, and the stated percentages are mass percentages.

[0046] The alumina is micron-sized alumina powder with a purity of 99.9%. The zirconia is micron-sized zirconia powder with a purity of 99.9%.

[0047] The zirconia powder contains 3% yttrium oxide, the percentage is a molar ratio, and the molar percentage content of the yttrium oxide is its proportion in the zirconia.

[0048] The present invention also proposes a method for preparing the anti-aging dental ceramic material, the specific process is:

[0049] Step 1, the preparation of the original eutectic powder.

[0050] Weigh the alumina and zirconia according to the mass percentage of 57.42% for alumina and 42.58% for zirconia, and prepare two mixed powders, each with a mass of 100g.

[0051] Put the two mixed powders into two z...

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Abstract

A dental alumina-zirconia eutectic ceramic rod and a preparation method thereof. An anti-aging dental ceramic material and a preparation method thereof. The anti-aging dental ceramic material is composed of alumina and zirconia. The directional solidification of the material is achieved by rapid heating and cooling of the laser beam, and an alumina-zirconia eutectic bioceramic with a smooth surface is prepared. The XRD results show that the pulling rate Alumina-zirconia eutectic bioceramics with a density of 200 μm / s aged for 145 h, all of which are tetragonal zirconia phases at diffraction angles of 35.2°, 40.5° and 41.3°, indicating that alumina-zirconia eutectic bioceramics is in the water There will be no phase change in a hot environment, that is, it has very excellent anti-aging ability.

Description

technical field [0001] The invention relates to the technical field of stomatology, in particular to preparing an alumina-zirconia eutectic ceramic rod with excellent anti-aging performance through a laser suspension zone melting method. Background technique [0002] Driven by the trend of global aging population, people's demand for dentures is increasing, so there is a great need to develop high-performance dental restoration materials. Zirconia ceramics have been widely used as dental restoration materials, such as crowns, porcelain posts, bridge piers, due to their high toughness, excellent aesthetic restorative properties (visible light transparency, X-ray opacity, etc.) and good biocompatibility , implants, etc. However, in a humid environment, zirconia ceramics will spontaneously undergo a tetragonal t–monoclinic m transition, degrading the mechanical properties and stability of the material. In 2001, about 400 zirconia femoral heads implanted in the human body suff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/653
Inventor 苏海军樊光娆张军刘林郭敏傅恒志
Owner NORTHWESTERN POLYTECHNICAL UNIV
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