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Ceramic powder for denture preparation and preparation method of ceramic powder

A technology for ceramic materials and dentures, applied in dental preparations, dental prostheses, pharmaceutical formulations, etc., can solve the problems of difficult reaction control, poor powder dispersion, complex production process, etc., to avoid hard agglomeration, prevent agglomeration, and evenly distribute Effect

Inactive Publication Date: 2014-05-07
厦门北大泰普医疗器械有限公司
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Problems solved by technology

[0005] In order to solve the above problems, in view of the disadvantages of the prior art that the reaction is not easy to control, the production process is complicated, the powder is poorly dispersed, easy to agglomerate, and the strength does not meet the requirements, a high flexural strength ( Greater than 600MPa), high fracture toughness (higher than structural ceramics such as alumina), good chemical stability (does not react with liquids in the human body, acid and alkali corrosion resistance), good biocompatibility (antithrombosis and sterilization) high-quality ceramic powder

Method used

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  • Ceramic powder for denture preparation and preparation method of ceramic powder
  • Ceramic powder for denture preparation and preparation method of ceramic powder

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Embodiment Construction

[0022] An embodiment of the present invention discloses a ceramic material powder for denture preparation, including 90% to 95% of stabilized tetragonal zirconia, and 2.5 to 3.49% of yttrium oxide as a stabilizer; wherein the ceramic material A precursor is obtained from the powder through co-precipitation reaction; the precursor is sequentially subjected to vacuum freeze-drying, high-temperature calcination and ball milling to form a powder with a bending strength greater than 600 MPa. like figure 2 The transmission electron microscope TEM image of the ceramic material powder shows that the particle size of the prepared powder is small, the average particle size is 20~50nm, and the dispersion is uniform; combined with figure 1 The XRD figure shows that, with the standard tetragonal phase ZrO 2 In contrast, the detected powder is a tetragonal phase. Further, the powder composition was analyzed by atomic emission spectrometer, which was ZrO 2 +HfO 2 +Y 2 o 3 ≥99.0%, Y 2...

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Abstract

The invention relates to a material for denture, and in particular relates to a zirconium-containing ceramic powder for denture preparation and a preparation method of the ceramic powder. The ceramic powder for denture preparation comprises 90-95 percent by weight of stable tetragonal-zircania and 2.5-3.49 percent by weight of yttrium oxide serving as a stabilizer, wherein a precursor is prepared from the ceramic powder by a co-precipitation reaction; the precursor is sequentially subjected to vacuum lyophilisation, high-temperature calcination and ball mill to form powder with bending strength of more than 600MPa. According to the preparation method, high bending strength can be obtained, and the high-quality ceramic powder with bending strength of more than 600MPa, high fracture toughness, high chemical stability and good bioavailability can be obtained.

Description

technical field [0001] The invention relates to a material used for dentures, in particular to a zirconium-containing ceramic material powder used for preparing dentures and a preparation method thereof. Background technique [0002] The development of oral restoration is inseparable from the development of oral materials and techniques. Denture restoration materials mainly include ceramics, resins and metal materials. However, the traditional glass-ceramic-based and alumina-based ceramic materials themselves are not strong enough and brittle, easy to break, which limits their use in oral restorations. [0003] With the rapid development of current oral restorative technology, all-ceramic materials have become the most widely used materials due to their good biocompatibility, corrosion resistance, dielectric properties, thermal stability and excellent aesthetic effects. Dental restoration materials. Zirconia is currently the all-ceramic material with the best mechanical pr...

Claims

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Application Information

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IPC IPC(8): A61K6/027C04B35/48C04B35/622
Inventor 陈海峰韩丹郜丽王晓静张晓虹吴晓亮王志平王永林
Owner 厦门北大泰普医疗器械有限公司
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