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A kind of colored zirconia ceramic

A technology of zirconia ceramics and phase zirconia, which is applied in the field of ceramic materials, can solve the problems of damage, light color of surface coating, increased cost of preparation equipment, etc., and achieve the effects of enhancing interface bonding, improving interface performance, and avoiding adverse effects.

Active Publication Date: 2019-10-18
HANGZHOU ERRAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101020607A and patent application No. 01119222.4 respectively report the method for preparing silver-white and golden zirconia ceramics by surface treatment, and CN102512256A reports the method for dyeing zirconia ceramics by using thin film, but the surface coating obtained by the similar surface treatment method Light in color, easily damaged during use
Chinese patents CN1566021 and CN102659401A report the method of preparing black and gray zirconia ceramics under graphite reducing atmosphere, but similar coloring methods need to be carried out under reducing or vacuum conditions
The disadvantage of similar methods is that due to the diversity of color requirements, the cost of preparation equipment is greatly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0035] 1.1. An example of the hydrothermal hydrolysis method for producing cubic zirconia slurry with one or more rare earth metal ions in solid solution

example 1

[0036] Example 1: The concentration of zirconium oxychloride (ZrOCl 2 ·8H 2 O≥99%) solution, yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O≥99.9%) solution, erbium nitrate (Er(NO 3 ) 3 ·5H2O≥99.9%) solution is added to the reactor; wherein the total amount of yttrium oxide is 2-6 mol% of the amount of zirconia, and the erbium oxide is 5-8 mol% of the amount of zirconia. Heat the reactor to 40-60°C and keep it for 2-3 hours. After the added yttrium nitrate is completely dissolved, add 0.5-1wt% polyvinyl alcohol according to the weight of the solution, and then heat to 200-250°C and keep it for 55- The hydrothermal-hydrolysis reaction was carried out for 65 hours. Keep the internal pressure at 2-3MPa and make it gradually hydrolyze and precipitate. Use a centrifuge to quickly separate, vacuum the precipitate, and wash with distilled water and ethanol to obtain cubic ZrO solid-dissolved rare earth erbium metal ions 2 Precursor. According to cubic ZrO 2 For the quality of the precursor, conf...

example 2

[0037] Example 2: Replace the erbium nitrate (Er(NO3)3·5H2O≥99.9%) solution in Example 1 with praseodymium nitrate (Pr(NO 3 ) 3 ·9H 2 O≥99.9%), neodymium nitrate (Nd(NO 3 ) 3 ·9H 2 O≥99.9%), holmium nitrate (Ho(NO 3 ) 3 ·5H 2 O≥99.9%), cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O≥99.9%), Europium nitrate (Eu(NO 3 ) 3 ·6H 2 O≥99.9%), samarium nitrate (Sm(NO 3 ) 3 ·5H 2 O≥99.9%), thulium nitrate (Tm(NO 3 ) 3 ·5H 2 O≥99.9%), terbium nitrate (Tb(NO 3 ) 3 ·6H 2 O≥99.9%) solution, or when nitrate is replaced with one or more of sulfate, chloride, citrate, acetate, acetate, and oxalate, yellow, yellow, and oxalate can be obtained respectively. Purple, light yellow, light yellow, rose red, orange, light green, brown cubic zirconia slurry.

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Abstract

The invention discloses a colored zirconia ceramic, which is composed of tetragonal phase zirconia serving as the main crystalline phase and cubic phase zirconia serving as a minor crystalline phase, or is composed of tetragonal phase zirconia serving as the main crystalline phase, cubic phase zirconia serving as a minor crystalline phase, and a transition metal oxide. The colored zirconia ceramic realizes coloring through a rare earth metal that is in a solid solution state in cubic phase zirconia crystal grains, or achieves coloring through a rare earth metal that is in a solid solution state in cubic phase zirconia crystal grains, and is assisted by the transition metal oxide provided transition metal for toning. According to the invention, coloring rare earth metal ions are in a solid solution state in cubic zirconia lattices, and have no influence to the stability of tetragonal zirconia; solid solution rare earth metal ions in cubic zirconia are mainly adopted for coloring, then the consumption of other transition metal oxide coloring materials can be reduced or even the coloring materials can be not used, thus reducing the influence of transition metal oxide coloring materials concentrated at crystal boundaries to sintering densification, and avoiding the adverse effect on material strength.

Description

Technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a colored zirconia ceramic. Background technique [0002] Currently, colored zirconia ceramics are usually prepared by three methods. [0003] One is that the white zirconia is partially sintered to 50-60% of the theoretical density and then soaked in a salt solution containing one or more transition metals and rare earth metal oxides for dyeing, then dried and further sintered. Such as the coloring solution and porous zirconia products described in patent CN104918900 A. Coloring solutions generally contain first transition metal elements, such as Fe, Mn, etc., which are likely to cause uneven coloring; first transition metal elements generally can only exist in grain boundaries; color ions exist in grain boundaries, which will reduce dental oxidation The light transmittance of zirconium products, if the content of coloring ions present in the grain boundaries is high, may a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 沈志坚熊焰张杰李廷凯
Owner HANGZHOU ERRAN TECH
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