A new method for preparing dental colored nano-zirconia powder

A nano-zirconia, a new method technology, applied in zirconia, dental prosthesis, dentistry, etc., can solve the problems of large particle surface energy, poor powder dispersibility, and easy agglomeration of particles, so as to achieve uniform powder particle size and low cost. Low, short cycle effect

Active Publication Date: 2017-11-10
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another coloring method is to use chemical methods, such as co-precipitation method, to achieve uniform mixing of stabilizers and colorants with zirconia ceramic powder. This method can effectively solve the problem of uniform mixing, but the biggest problem is due to the particle size of the powder. Very small, the surface energy of the particles is extremely large, therefore, the particles are prone to agglomeration during drying, calcination, etc., and the powder dispersibility is poor

Method used

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  • A new method for preparing dental colored nano-zirconia powder
  • A new method for preparing dental colored nano-zirconia powder
  • A new method for preparing dental colored nano-zirconia powder

Examples

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Embodiment 1

[0032] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Er(NO 3 ) 3 ·6H 2 After O is dissolved in deionized water respectively, stir and mix to form a mixed solution of zirconium salt, yttrium salt and colorant; the concentration of zirconium salt, yttrium salt and colorant mixed solution is 0.6mol / L; the total amount of mixed solution is 1mol calculation, ZrOCl 2 ·8H 2 O is 0.95mol, Y 2 o 3 0.05mol; iron oxide 800ppm, cerium oxide 500ppm, erbium oxide 500ppm; dispersant absolute ethanol was added to the mixed solution and ammonia solution, stirred, and constant volume; the amount of absolute ethanol accounted for zirconium salt, yttrium salt and colorant 20% of the volume of the mixed solution and the aqueous ammonia solution; the amount of the ammonia solution is 10% excessive on the basis of meeting the amount required for the chemical reaction with the zirconium salt, yttrium salt and coloring agent, so as to adjust the pH valu...

Embodiment 2

[0034] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Er(NO 3 ) 3 ·6H 2 After O is dissolved in deionized water respectively, stir and mix to form a mixed solution of zirconium salt, yttrium salt and colorant; the concentration of zirconium salt, yttrium salt and colorant mixed solution is 0.6mol / L; the total amount of mixed solution is 1mol calculation, ZrOCl 2 ·8H 2 O is 0.95mol, Y 2 o 3 0.05mol; iron oxide 1000ppm, cerium oxide 500ppm, erbium oxide 500ppm; the dispersant absolute ethanol was added to the mixed solution of zirconium salt, yttrium salt and coloring agent and ammonia solution, stirred and constant volume; the amount of absolute ethanol was respectively Accounting for 20% of the volume of the mixed solution of zirconium salt, yttrium salt and colorant and the volume of ammonia water solution; the amount of ammonia solution is 10% in excess of the amount required for chemical reaction with zirconium salt, yttrium s...

Embodiment 3

[0036] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Er(NO 3 ) 3 ·6H 2 After O is dissolved in deionized water respectively, stir and mix to form a mixed solution of zirconium salt, yttrium salt and colorant; the concentration of the mixed solution of zirconium salt, yttrium salt and colorant is 0.6mol / L; The total amount of the mixed solution with the colorant is calculated as 1mol, ZrOCl 2 ·8H 2 O is 0.95mol, Y 2 o 3 0.05mol; iron oxide 1200ppm, cerium oxide 500ppm, erbium oxide 500ppm; dispersant absolute ethanol is added zirconium salt, yttrium salt and coloring agent mixed solution and ammonia solution respectively, stirs, constant volume; The amount of absolute ethanol accounts for respectively 20% of the volume of zirconium salt, yttrium salt and colorant mixed solution and ammonia water solution; the amount of ammonia solution is 10% in excess of the amount required for chemical reaction with zirconium salt, yttrium salt...

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Abstract

The invention provides a new method for preparing dental colored nano zirconium oxide powder, and relates to a preparation method of dental multicolor nano zirconium oxide powder. According to the method, a rapid co-precipitation method is adopted to combine a coloring process and a preparation process of zirconium oxide nano powder together, and the dental colored nano zirconium oxide powder which is uniform in particle size, good in dispersity and uniform in color and is controllable is prepared without using a surfactant. The powder prepared by the method provided by the invention is uniform in particle size distribution, and is nano-scale; and the preparation process is short in cycle and low in cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of dental materials, in particular to a method for preparing dental colored nano-zirconia powder. Background technique [0002] Dental yttria-stabilized zirconia materials are mostly white to ivory, and this zirconia material without surface opaque treatment cannot meet the clinical requirements for the color of denture restorations. There are two main methods of coloring yttria stabilized zirconia materials. One is a solid-phase mechanical mixing method in which the colorant and ceramic powder are mixed by ball milling, stirring, kneading and other technologies. This method has uneven color and poor repeatability. It is easy to cause volatile pollution during high-temperature sintering and consumes a lot of energy. , The preparation cost is high. Currently commonly used zirconia colorants include Fe 2 o 3 , CeO 2 , Er 2 o 3 , Bi 2 o 3 , Pr 2 o 3 , Mn 2 O et al., but coloring zirconia with a single oxide s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02A61K6/02B82Y40/00
CPCA61K6/78A61K6/818C01G25/02C01P2002/72C01P2004/04C01P2004/64
Inventor 陈智慧丁建宁袁宁一李志伟邱建华
Owner CHANGZHOU UNIV
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