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Processing technology capable of rapidly preparing multi-layer zirconia ceramic block with uniform transition

A technology of zirconia and transition layer, which is applied in the direction of dentures, etc., can solve the problems that the natural transition of color cannot be realized, the comprehensive mechanical properties of zirconia porcelain blocks cannot meet the demand, and edge collapse occurs.

Active Publication Date: 2019-09-06
CHENGDU BESMILE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is currently no prior art that provides a zirconia ceramic block preparation process that can simultaneously have excellent comprehensive mechanical properties and good appearance attributes, or it is impossible to achieve a natural color transition, or it is mechanical processing or Chipping occurs during high-temperature sintering, and the scrap rate is too high, or the comprehensive mechanical properties of the final zirconia ceramic block can not meet the demand, and so on.

Method used

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  • Processing technology capable of rapidly preparing multi-layer zirconia ceramic block with uniform transition
  • Processing technology capable of rapidly preparing multi-layer zirconia ceramic block with uniform transition
  • Processing technology capable of rapidly preparing multi-layer zirconia ceramic block with uniform transition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Example 1: Display of comprehensive mechanical properties and transparency effects of zirconia ceramic blocks

[0096] 1. Prepare 35 groups of monolithic zirconia ceramic blocks according to the above-mentioned general formula, with 20 repetitions for each group. The specific formulations of each group of zirconia ceramic blocks are shown in Table 1. The values ​​in the table are all mass fractions, and the balance is zirconia powder; in each group of zirconia ceramic blocks, the average content of coloring matter is 0.4%. The colorant may be any one or a mixture of erbium chloride, ferric chloride, neodymium nitrate, manganese nitrate, ammonium metavanadate, cerium nitrate, praseodymium nitrate, cobalt nitrate and nickel nitrate. For the convenience of operation, all the embodiments of the present invention use the colored matter obtained by mixing erbium chloride, ferric chloride, and manganese nitrate in a mass ratio of 6:1:2, and the color is tetracycline gray. It ...

Embodiment 2

[0105] Embodiment 2: Determining the shrinkage rate of the lightest layer and the darkest layer of zirconia ceramic block

[0106] 1. According to the actual situation of the patient, or according to the general needs, select the powder formula of each layer of zirconia ceramic block. In this example, according to the general requirements, the formula of Example Group 31 is selected as the occlusal end formula, and the formula of Example Group 23 is selected as the long bridge end formula. And add colorant accordingly, adjust the color of each group formula. Because the occlusal end requires a lighter color, add 0.3% coloring matter to the occlusal end formula, and reduce the zirconia powder content by 0.3% accordingly, as the lightest color layer formula; add 0.5% coloring matter to the long bridge end formula , and correspondingly reduce the zirconia powder content by 0.5%, as the darkest layer formula.

[0107] 2. With the formula determined above, the whole piece of zirc...

Embodiment 3

[0120] Example 3: Demonstration of the effect of high temperature sintering process

[0121] 1. Select Group 1 of Example 2, set 21 components of layered zirconia powder formula, and set 10 repetitions for each group; place each layer of powder in sequence, isostatic pressing molding, and pre-sintering according to the method of Example 2 1. After mechanical processing, high-temperature sintering is carried out according to the method in Table 6 respectively.

[0122] Table 6 High temperature sintering process parameter list of each group

[0123]

[0124]

[0125] 2. Measure the flexural strength of the zirconia ceramic blocks prepared by each group, observe the chipping rate of each group of zirconia ceramic blocks during high-temperature sintering, and observe the transparency and color transition of each group of zirconia ceramic blocks. The results are as follows: Table 7 shows.

[0126] Table 7 Performance display of each group of zirconia ceramic blocks

[0127...

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Abstract

The invention belongs to the field of oral materials, in particular relates to a sintering process for rapidly preparing a zirconia ceramic block with uniform strength and color transition, and in particular relates to a high-toughness zirconia ceramic block, and the powder formula of the zirconia ceramic block comprises 1.5 to 12% of yttrium oxide, 0 to 2.5% of silicon carbide nano whiskers, 0 to1.5% of a coloring matter and the balance of zirconium oxide according to the mass fraction. Based on the ceramic block, the multilayer zirconia ceramic block with uniform transition of comprehensivemechanical properties, color and permeability is provided. At the same time, a process capable of completing the sintering of the zirconia ceramic block with high efficiency and high quality is provided. By using the process, the zirconia ceramic block with excellent comprehensive mechanical properties and uniform color and permeability transition can be obtained in as short a time as possible.

Description

technical field [0001] The invention belongs to the field of oral cavity materials, and in particular relates to a processing technology for rapidly preparing zirconia porcelain blocks with uniform strength and uniform color transition. Background technique [0002] With the progress and development of society and the diversification of the application of oral materials, zirconia ingots account for an increasing proportion in the dental industry due to their warm and jade-like appearance and good mechanical properties. With the improvement of people's living standards, the requirements for dentures made of zirconia ceramic blocks are getting higher and higher, not only requiring excellent comprehensive mechanical properties, but also requiring good appearance properties. For dental zirconia blocks, their light transmission, lubricity, bending strength, and fracture toughness are all affected by the formula of zirconia blocks and high-temperature sintering process at the same...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622A61C13/083
CPCC04B35/481C04B35/622A61C13/083C04B2235/3225C04B2235/5276C04B2235/5454C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/75C04B2235/9661C04B2235/661
Inventor 罗友明鄢新章刘谋山廖祥冯崇敬刘帅
Owner CHENGDU BESMILE BIOTECH
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