Dental alumina-zirconia eutectic ceramic rod and preparation method thereof

A technology of dental ceramics and zirconia, applied in the field of stomatology, can solve the problems of aging and failure of zirconia ceramics, and achieve the effect of high anti-aging performance and optimized low-temperature degradation resistance.

Active Publication Date: 2019-06-11
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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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

The invention provides a dental alumina-zirconia eutectic ceramic rod and a preparation method thereof. The invention relates to 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 realized by rapid laser beam heating and cooling, and alumina-zirconia eutectic bioceramic with smooth surface is prepared. The XRD results show that after the alumina-zirconia eutectic bioceramic with a drawing rate of 200 [mu]m / s is aged for 145 hours, a tetragonal zirconia phase is observed at the diffraction angles of 35.2 degrees, 40.5 degrees and 41.3 degrees, indicating that the phase transformation of the alumina-zirconia eutectic bioceramic does not occur in the hydrothermal environment, i.e., the alumina-zirconia eutectic bioceramic has excellent aging resistance.

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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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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