Injection molding zirconium oxide and preparation method for same

An injection molding, phase zirconia technology, which is applied in the field of zirconia fine ceramic materials, can solve the problems of inability to achieve rapid miscibility of the binder, difficulty in mixing powder and binder, and non-spherical shape or agglomeration. Avoid deformation, fluidity does not agglomerate, good fluidity effect

Active Publication Date: 2015-07-08
YAAN YUANCHUANG CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If the components of the injection molding powder are dispersed unevenly, the primary particle size will be larger, and the sintering temperature will increase; the powder itself has voids, and the shape is not spherical or agglomerated; it will make it difficult to mix the powder with the binder, and it will not be possible to achieve the same process as the powder. Rapid miscibility of the binder, deformation, warping and collapse of the blank after debinding

Method used

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  • Injection molding zirconium oxide and preparation method for same
  • Injection molding zirconium oxide and preparation method for same
  • Injection molding zirconium oxide and preparation method for same

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The commercially available zirconia injection powder and organic carrier are mixed in a weight ratio of 100:13; after banburying, the injection molding material is obtained, and then the green body is made by injection molding process, and the secondary degreasing treatment of oil soaking and heating degreasing is carried out. Finally, a high-performance zirconia ceramic ferrule is made through a sintering process. The powder organic carrier is a mixture of EVA and polystyrene, polypropylene, vegetable oil, oleic acid, paraffin, and the powder organic carrier proportioning is as follows according to the total weight percentage of the powder organic carrier:

[0024] Paraffin: 20~90%.

[0025] Oleic acid: 0~30%

[0026] Polystyrene: 5~30%

[0027] Polypropylene: 2~40%

[0028] Stearic acid: 0~10%

[0029] Beeswax: 0~10%

[0030] The zirconia ceramic injection manufacturing process includes:

[0031] (1) Banbury

[0032] First raise the temperature of the internal ...

Embodiment 2

[0042] (1) with ZrOCl 2 ·8H 2 O, Y 2 o 3 Make a mixed aqueous solution for the raw materials, add the third component and dispersant at the same time, and the Zr in the mixed solution 4+ The ion concentration is 2mol / L; the dispersant is polyacrylic acid PAA, sodium polyacrylate PAAS, polymaleic acid, polymaleic anhydride HPMA, maleic acid-acrylic acid copolymer MA-AA, acrylic acid-2-acrylamide-2- One or more combinations of methylpropanesulfonic acid polypolymer AA / AMPS, modified polycarboxylate, polyacrylate, polyvinyl alcohol;

[0043] (2) Add precipitant ammonium oxalate to the mixed aqueous solution in step (1), the added precipitant is ammonium oxalate, and the added ratio is nZr 4+ ︰n ammonium oxalate≈1︰(1.2~1.3);

[0044](3) Then vibrating mill stirring to obtain ultra-fine, uniformly dispersed sediment;

[0045] (4) Wash the precipitate prepared in step (3) with distilled water several times to remove almost all chloride ions;

[0046] (5) Add an appropriate am...

Embodiment 3

[0070] (1) with ZrOCl 2 ·8H 2 O, Y 2 o 3 Make a mixed aqueous solution for the raw materials, add the third component and dispersant at the same time, and the Zr in the mixed solution 4+ The ion concentration is 3mol / L; the dispersant is polyacrylic acid PAA, sodium polyacrylate PAAS, polymaleic acid, polymaleic anhydride HPMA, maleic acid-acrylic acid copolymer MA-AA, acrylic acid-2-acrylamide-2- One or more combinations of methylpropanesulfonic acid polypolymer AA / AMPS, modified polycarboxylate, polyacrylate, polyvinyl alcohol;

[0071] (2) Add precipitant ammonium oxalate to the mixed aqueous solution in step (1), the added precipitant is ammonium oxalate, and the added ratio is nZr4+:n ammonium oxalate≈1:(1.2~1.3);

[0072] (3) Then vibrating mill stirring to obtain ultra-fine, uniformly dispersed sediment;

[0073] (4) Wash the precipitate prepared in step (3) with distilled water several times to remove almost all chloride ions;

[0074] (5) Add an appropriate amou...

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Abstract

The invention relates to composite injection molding zirconium oxide nanopowder and a preparation method for the same. The zirconium oxide nanopowder mainly comprises 2 to 8 molar percent of yttrium oxide and one or more third components of aluminum oxide, magnesium oxide and calcium oxide, wherein yttrium oxide is used for stabilizing a tetragonal zirconium oxide material as a stabilizer; the one or more third components form a doped system; the total amount of the doped system formed by aluminum oxide, magnesium oxide and calcium oxide is less than 6 weight percent. The composite injection molding zirconium oxide nanopowder has uniform component dispersity and high ultrafine particle size once-generation sintering activity, is dense, free of cracks and caking, spherical and high in flowability, has high wettability with an adhesive, and can be rapidly mixed with the adhesive; in addition, the nanopowder has sufficient frictional force, so that deformation and collapse caused by the separation of the adhesive from a blank are avoided; a process is simple and easy for mass production.

Description

[0001] The present invention claims that the applicant submitted the application number CN201310451682.3 to the State Intellectual Property Office of China on September 29, 2013, and the title of the invention is "a kind of injection molding zirconia composite powder and its preparation method". Priority, the entire content of the above application is incorporated herein by reference. technical field [0002] The invention relates to a nano zirconia composite powder for injection molding and a preparation method thereof, belonging to the technical field of zirconia fine ceramic materials. Background technique [0003] Ceramic injection molding (CIM) is a precision ceramic molding method developed on the basis of polymer injection molding technology. It can be mass-produced with high efficiency and can precisely control the process. Due to its molding size The precise controllability and the ability to form ceramic parts with complex shapes make injection molding an indispen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 罗忠义王恩远
Owner YAAN YUANCHUANG CERAMIC
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