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A kind of milling and grinding zirconia ceramics and its preparation method

A zirconia ceramic, milling technology, applied in the field of dental material production, to achieve the effect of high specific surface area

Active Publication Date: 2019-11-08
HANGZHOU ERRAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the existing zirconia ceramics can only be processed with diamond tools, and provide an easy-to-mill zirconia ceramics and its preparation method, which do not need to use diamond tools for processing, have excellent machinability and can Preparation of dental restorations of various complex shapes

Method used

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  • A kind of milling and grinding zirconia ceramics and its preparation method
  • A kind of milling and grinding zirconia ceramics and its preparation method
  • A kind of milling and grinding zirconia ceramics and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] 1. Orderly merger of nanocrystals to form grains with mesoscopic crystal structure (that is, preparation of nano primary particles to controlly agglomerate into nano secondary particles)

[0050] 1.1 Controllable agglomeration of nano primary particles into nano secondary particles (grains with mesoscopic crystal structure) white powder preparation

[0051] Co-precipitation method: using zirconium and yttrium water-soluble compounds as precursors, through external heating and precise control of liquid-phase co-precipitation reactions, calcination processes and additives to produce controllable agglomeration of primary nanoparticles with different grain sizes Nano secondary particles. The precipitant is NH 4 HCO 3 and NH 3 ·H 2 O mixed solution, where NH 4 HCO 3 The volume fraction of ≤50%. The precursor solution includes a zirconium water-soluble compound: zirconium hydroxide (ZrO(OH) 2 ·nH 2 O≥99%), zirconium oxychloride (ZrOCl 2 ·8H 2 O≥99%), zirconium nitr...

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Abstract

The invention discloses an easy-milling and grinding zirconia ceramic and a preparation method thereof. The tetragonal phase is the main crystal phase, the content of the tetragonal phase is more than 80 vol%, and the remaining crystal phases are cubic phases; the easy-milling and grinding zirconia ceramic crystal The grains have a mesoscopic crystal structure, and the grains with the mesoscopic crystal structure have nanopores. The invention does not need to use a diamond tool for processing, has excellent machinability and can prepare various dental restorations with complex shapes.

Description

technical field [0001] The invention relates to the technical field of dental material production, in particular to a millable zirconia ceramic and a preparation method thereof. Background technique [0002] ZrO 2 Ceramics are biologically inert ceramics, which have the characteristics of good biocompatibility, high strength and high toughness, and are a new type of dental restoration material. However, zirconia ceramics have high strength and high toughness (the strength is above 800Mpa, and the toughness is above 8.0Mpa m1 / 2), so the equipment for processing zirconia ceramics is demanding, and only diamond tools can be used for processing, which makes the processing cost Especially high, thus restricting the application and development of zirconia in the field of dental restoration. [0003] Although ceramics are widely used due to their excellent physical properties such as high mechanical strength, high dielectric breakdown strength, high resistivity, high temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/632C04B35/634A61L27/10
CPCA61L27/10C04B35/48C04B35/622C04B35/632C04B35/634A61L2430/12C04B2235/3225C04B2235/5445C04B2235/5454C04B2235/785C04B2235/77C04B2235/96C04B35/638C04B2235/661C04B2235/665C04B2235/781C04B35/486C04B2235/765C04B2235/80C04B2235/3229C04B2235/9661C04B2235/3289C04B2235/3272C04B2235/3275C04B2235/3262C04B2235/604C04B2235/6022C04B2235/602C04B2235/6562C04B38/0054
Inventor 沈志坚赵武元李廷凯
Owner HANGZHOU ERRAN TECH
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