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Preparation method of nano-silicon-coated micro-hard abrasive grains for dental zirconia ceramic tribochemical silicon coating system

A technology of zirconia ceramics and tribochemistry, which is applied in the field of material preparation, can solve problems such as high cost and complicated process, and achieve the effects of low cost, stable process and high yield

Inactive Publication Date: 2016-08-24
NANJING WOWEN PHOTOELECTRIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: the preparation method of conventional aluminum oxide gravel covered with a silicon oxide layer has complicated process and high cost. A dental zirconia ceramic tribochemical method silicon coating system is proposed to use nano-silicon to coat micro-hard Preparation method of quality abrasive grains

Method used

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  • Preparation method of nano-silicon-coated micro-hard abrasive grains for dental zirconia ceramic tribochemical silicon coating system
  • Preparation method of nano-silicon-coated micro-hard abrasive grains for dental zirconia ceramic tribochemical silicon coating system
  • Preparation method of nano-silicon-coated micro-hard abrasive grains for dental zirconia ceramic tribochemical silicon coating system

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Effect test

Embodiment 1

[0035] Using P-doped monocrystalline silicon (0.01Ω cm) as the raw material, nano-silicon spheres were prepared in deionized water by the pulse discharge method. The average particle size of the silicon spheres was 10nm. The slurry with a mass fraction of 15% silicon spheres has a viscosity of 105 Pa·s, then mix the nano-silicon slurry and aluminum oxide with a particle size of 100 μm in a weight ratio of 1:3, and stir well to make the nano-silicon The balls are evenly adhered to the surface of the alumina abrasive. Finally, heat it to 600°C in a high-temperature furnace and keep it for 1 hour to oxidize the surface of the nano-silicon spheres to form a silicon dioxide layer and make it have a certain bonding force with aluminum oxide.

Embodiment 2

[0037] Using P-doped single crystal silicon (0.01Ω cm) as raw material, nano-silicon spheres were prepared in deionized water by pulse discharge method. The average particle size of the silicon spheres was 20nm. The slurry with a mass fraction of 10% silicon spheres has a viscosity of 156 Pa·s, then mix the nano-silicon slurry and aluminum oxide with a particle size of 30 μm in a weight ratio of 1:4, and stir well to make the nano-silicon The balls are evenly adhered to the surface of the alumina abrasive. Finally, heat it to 600°C in a high-temperature furnace and keep it for 2 hours to oxidize the surface of the nano-silicon spheres to form a silicon dioxide layer and make it form a certain bonding force with aluminum oxide.

Embodiment 3

[0039] Using P-doped monocrystalline silicon (0.01Ω cm) as the raw material, nano-silicon spheres were prepared in deionized water by pulse discharge method. The slurry with a fraction of 15% has a viscosity of 178 Pa•s, then mix the nano-silicon slurry and diamond abrasive grains with a particle size of 30 μm in a weight ratio of 1:4, and stir well to make the nano-silicon balls adhere evenly on the diamond abrasive surface. Finally, heat it to 600°C in a high-temperature furnace and keep it for 1.5 hours to oxidize the surface of the nano-silicon spheres to form a silicon dioxide layer and make it bond with the diamond to a certain extent.

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Abstract

The invention relates to a preparation method of nano-silicon-coated microhard abrasive particles for a dental zirconia ceramic tribochemical silicon coating. The preparation method comprises the following steps: vaporizing silicon serving as a raw material by virtue of pulse discharging to form nano-silicon spheres; preparing nano-silicon slurry with good dispersity and certain viscosity from the prepared nano-silicon spheres, adding hard abrasive particles into the nano-silicon slurry, and adequately and uniformly stirring to uniformly adhere the nano-silicon spheres to the surfaces of the hard abrasive particles; finally heating and drying in a high temperature furnace, oxidizing the surfaces of the nano-silicon spheres to form a silica covering layer; simultaneously melting the silica covering layer to generate a certain binding force with the abrasive particles. By virtue of a tribochemical method, after the surface of the dental zirconia ceramic is processed by virtue of the microhard abrasive particles, the binding strength between the ceramic and resin can be remarkably improved, and the effect of the microhard abrasive particles is similar to the effects of mainstream products in the current market. The preparation method is simple and stable in process, low in cost and applicable to large-scale batch production.

Description

technical field [0001] The invention relates to a preparation method for a dental zirconia ceramic tribochemical method silicon coating system coated with micro-hard abrasive grains with nano-silicon, belonging to the field of material preparation. Background technique [0002] Dental all-ceramic materials can be divided into alumina-based ceramics, zirconia-based ceramics, and glass-based ceramics according to their main components. Among them, zirconia-based ceramics stand out among dental all-ceramic materials due to their excellent mechanical properties and good aesthetic properties, especially when making multi-unit fixed bridges, implants, telescopic crowns and other restorations with all-ceramic materials, zirconia Base ceramics replace other types of ceramics and become the first choice or even the only choice. [0003] In the process of all-ceramic restoration, resin cement is routinely used because it is superior to other adhesive types in terms of bonding strengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85
Inventor 汪炜谢海峰张伟
Owner NANJING WOWEN PHOTOELECTRIC TECH