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Preparation method for uniform gradient-colour zirconium oxide porcelain blocks

A zirconia and gradient color technology, which is applied in dental preparations, pharmaceutical formulas, dental prostheses, etc., can solve the problems of no color change and uneven color change of porcelain block, etc., achieve continuous and uniform color change, enhance the reliability of dentures, The effect of coloring stability

Active Publication Date: 2015-09-16
CHENGDU BESMILE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a uniform gradient color zirconia porcelain block, which solves the problem of uneven color change or no color change of the porcelain block in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh ZrO 2 : 94.919 copies, Y 2 O 3 :5 copies, CeO 2 :0.01 parts, Fe 2 O 3 :0.05 parts, Pr 6 O 11 : 0.001 copies and Er 2 O 3 :0.02 parts, add to the mixer to mix well, and dry at 65℃ for 24h;

[0026] Add 2 parts by weight of polyvinyl alcohol solution binder, mix well, and granulate through a 50-mesh sieve;

[0027] Then put the granulated powder into the mold, and dry it into a 30Mpa hydraulic press with a 100T press;

[0028] The product after dry pressing is isostatically pressed at 160Mpa for 2 minutes, and the product after isostatic pressing is pre-sintered at 850°C and kept for 5 hours;

[0029] The pre-sintered zirconia embryo body is immersed in a dyeing container that continuously maintains the height of the dyeing solution 1mm for 2 minutes; the weight percentage of the dyeing solution used is: polyethylene glycol 5%, erbium oxide 2%, oxidation Praseodymium 1%, the balance is ultrapure water; the liquid level of the dyeing solution is guaranteed by supplementing t...

Embodiment 2

[0033] Weigh ZrO 2 : 93.138 copies, Y 2 O 3 :6 copies, CeO 2 :0.05 parts, Fe 2 O 3 :0.01 part, Pr 6 O 11 : 0.002 copies and Er 2 O 3 :0.8 parts, add to the mixer and mix well and dry at 65℃ for 18h for later use;

[0034] Add 2 parts by weight of polyvinyl alcohol solution binder, mix well, and granulate through a 50-mesh sieve;

[0035] Then put the granulated powder into the mold, and dry it into 50Mpa under the hydraulic press;

[0036] After dry pressing, the product is isostatically pressed at 180Mpa for 2min;

[0037] The product after isostatic pressing is pre-sintered at 1100°C and kept for 3h;

[0038] The pre-sintered zirconia embryo body is immersed in a dyeing container that keeps the height of the dyeing solution 0.5mm for 3 minutes; the weight percentage of the dyeing solution used is: polyethylene glycol 3%, erbium oxide 0.2%, praseodymium oxide 5%, the balance is ultrapure water;

[0039] After the soaking is completed, dry at 100°C for 3 hours; then, the product dyed wi...

Embodiment 3

[0042] Weigh ZrO 2 : 92.39 copies, Y 2 O 3 :7 copies, CeO 2 :0.01 parts, Fe 2 O 3 :0.05 parts, Pr 6 O 11 :0.05 copies and Er 2 O 3 : 0.5 part, add to the mixer and mix well and dry at 80℃ for 24h for later use;

[0043] Add 4 parts by weight of polyvinyl alcohol solution binder, mix well, and granulate through a 50-mesh sieve;

[0044] Then put the granulated powder into the mold, and dry it under 30Mpa under a hydraulic press;

[0045] The product after dry pressing is isostatically pressed at 160Mpa for 2 minutes, and the product after isostatic pressing is pre-sintered at 900°C and kept for 5 hours;

[0046] The pre-sintered zirconia embryo body is soaked in a dyeing container that keeps the height of the dyeing solution 3mm for 1 min; the weight percentage of the dyeing solution used is: polyethylene glycol 5%, erbium oxide 0.5%, praseodymium oxide 10 %, the balance is ultrapure water;

[0047] After the soaking is completed, it is dried at 130°C for 2h; the product dyed with the d...

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Abstract

The invention relates to zirconium oxide porcelain blocks for dental prosthesis, and aims at providing a preparation method for uniform gradient-colour zirconium oxide porcelain blocks. The preparation method comprises the following steps: (1) weighing the raw materials of CeO2, Fe2O3, ZrO2, Y2O3, Pr6O11 and Er2O3; (2) adding a polymer binder in the dried mixed powder, and granulating; (3) shaping the granulated material by a die by means of dry pressing to obtain porcelain block blanks; (4) carrying out isostatic cool pressing on the shaped porcelain block blanks; (5) pre-sintering the porcelain block blanks after the isostatic cool pressing; (6) flatly placing the pre-sintered porcelain block blanks in a dyeing container and dyeing, wherein the depth of soaking solution in the dyeing container is 0.1-5mm, the dyeing time is 1-3min, and the used dyeing solution comprises 1-5wt% of polyethylene glycol, 0.1-3wt% of erbium oxide, 0.5-10wt% of praseodymium oxide and the balance of ultrapure water; and (7) sintering the dyed porcelain blocks to obtain the uniform gradient-colour zirconium oxide porcelain blocks for dentistry. The porcelain blocks disclosed by the invention are stable and uniform in colouring, and continuous and uniform in colour changes.

Description

Technical field [0001] The invention relates to medical materials, in particular to zirconia porcelain blocks for dental restorations. Background technique [0002] Oral repair ceramic materials have gradually become a kind of biomaterials with wide application prospects due to their good mechanical properties, chemical stability, biocompatibility and aesthetics. Among the many ceramic materials, tetragonal zirconia porcelain blocks are widely used in dental restorative materials due to their excellent properties, and have become a research focus at home and abroad. [0003] The general shape of zirconia porcelain block is a round cake, which is made by mixing nano zirconia powder and other powder materials, then forming a blank, and sintering at high temperature. Zirconia porcelain block is used for engraving and processing all-ceramic dentures, and is the main material of all-ceramic crowns for dental fixed and restoration dentures. The denture processed in this way does not ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B41/87A61K6/027
Inventor 刘谋山
Owner CHENGDU BESMILE BIOTECH
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