Zirconia ceramic slurry for micro-flow extrusion molding, and preparation method and application thereof

A zirconia ceramic, extrusion molding technology, used in ceramic molding machines, dental preparations, manufacturing tools, etc., can solve the problems of liquid phase migration, insufficient strength of extruded filaments, etc. The effect of not taking into account the rheology and good dispersibility

Active Publication Date: 2020-04-17
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In 2017, the published article "Preparation and Performance Research of Ceramic Denture Materials for Three-dimensional Printing" proposed a zirconia ceramic slurry: using dental grade ceramic oxide powder, silane coupling agent, propanol and deionized Zirconia ceramic slurry is made of water etc., and its solid content is 55wt% (low solid phase). Although the slurry provided by it meets the performance requirements of dentures and is relatively smooth during extrusion, However, it is prone to problems such as liquid phase migration and insufficient strength of extruded wire due to low solid content.

Method used

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  • Zirconia ceramic slurry for micro-flow extrusion molding, and preparation method and application thereof
  • Zirconia ceramic slurry for micro-flow extrusion molding, and preparation method and application thereof
  • Zirconia ceramic slurry for micro-flow extrusion molding, and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0048] A method for preparing zirconia ceramic slurry for micro-flow extrusion molding, characterized in that: the preparation method includes the following steps:

[0049] Weigh and mix ceramic powder, sodium polyacrylate dispersant and MHR-070 hydantoin epoxy resin toughening agent according to the above ratio, add lubricant measured according to the proportion, and add pH regulator to adjust the pH value to 8 ~9; The above mixed liquid was magnetically stirred for 30~40min, after stirring, it was placed in a TJ series planetary ball mill tank, and the milling speed was kept at 1000~1200r / min for 8~12h, and after standing for 2h, the microfluidic Extruded zirconia ceramic paste.

[0050] An application of zirconia ceramic slurry for micro-flow extrusion molding, characterized in that: comprising the following steps:

[0051]Inject the zirconia ceramic slurry obtained above for micro-flow extrusion molding into the plunger cylinder of the three-dimensional molding printing e...

Embodiment 1

[0053] For the zirconia ceramic slurry used in the micro-flow extrusion molding process used in this example, the composition of the ceramic powder used and the mass fraction of each component are shown in Table 1. The components of the zirconia ceramic slurry used And the mass fraction of each component is shown in Table 2.

[0054] Table 1 Composition of ceramic powder (mass fraction, %)

[0055] ceramic powder Aluminum oxide Titanium oxide Zirconia quality score 5％ 3％ 92％

[0056] Table 2 Composition of zirconia ceramic slurry (mass fraction, %)

[0057] Zirconia Ceramic Slurry ceramic powder lubricant Sodium polyacrylate Hein Epoxy quality score 68wt% 20wt% 4.08wt% 8.16wt%

[0058] Aluminum oxide and titanium oxide are both nano-scale ceramic powders, and sodium polyacrylate is diluted with an aqueous solution to form an aqueous solution with a mass fraction of 50 wt%, and its molecular mass number is 3000-50...

Embodiment 2

[0098] For the zirconia ceramic slurry used in the micro-flow extrusion molding process used in this example, the composition of the ceramic powder used and the mass fraction of each component are shown in Table 5. The components of the zirconia ceramic slurry used And the mass fraction of each component is shown in Table 6.

[0099] Table 5 Composition of ceramic powder (mass fraction, %)

[0100] ceramic powder Aluminum oxide Titanium oxide Zirconia quality score 3％ 4％ 93％

[0101] Table 6 Composition of zirconia ceramic slurry (mass fraction, %)

[0102] Zirconia Ceramic Slurry ceramic powder lubricant Sodium polyacrylate Hein Epoxy quality score 70wt% 20wt% 3.5wt% 6.5wt%

[0103] Other steps are identical with embodiment 1, and the product that obtains is with embodiment 1.

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Abstract

The invention relates to a zirconia ceramic slurry for micro-flow extrusion molding, and a preparation method and an application thereof. The zirconia ceramic slurry comprises ceramic powder, a lubricant, a dispersant, a toughening agent and a pH regulator, wherein the ceramic powder comprises, by mass, 3-6% of alumina, 2-5% of titanium oxide and 90-95% of dental base material zirconia; the volumeratio of deionized water to glycerol in the lubricant is 9:1; the dispersant is sodium polyacrylate, and the mass of the dispersant is 4-10% of that of zirconia; and the mass ratio of the sum of theceramic powder, the dispersant and the toughening agent to the lubricant is 3:(7-17). The addition of the sodium polyacrylate organic matter improves the rheological properties of the slurry, and makes the high solid phase and the rheological property considered at the same time; and the strength and the toughness of the ceramic slurry are enhanced, so that the ceramic slurry is smoothly extrudedunder a micro-flow extrusion molding process, no liquid phase migration occurs or the generated liquid phase migration is low and can be ignored, and an extruded green body is not prone to collapsing.

Description

technical field [0001] The invention belongs to the technical field of printing materials for additive manufacturing, and relates to a zirconia ceramic slurry used in a micro-flow extrusion molding process, in particular to a zirconia ceramic slurry used in a micro-flow extrusion molding and its preparation methods and applications. Background technique [0002] Ceramics are widely used in biomedicine and other disciplines because of their high strength, toughness, and biocompatibility, and are developing rapidly. Bioceramic materials are known as "future materials" because of their excellent performance. In the field of biomedicine, ceramic materials have become the first choice for repair materials due to their excellent biocompatibility, good wear resistance and corrosion resistance, and are often used to make human bones and ceramic dentures. [0003] The main components of ceramic materials used to make bioprostheses can be divided into three categories, including sili...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626A61K6/818A61K6/802A61K6/816A61K6/887A61K6/891B28B1/00C04B35/632C04B35/634B33Y10/00B33Y70/00
CPCC04B35/48C04B35/62605B28B1/001C04B35/63404C04B35/63452C04B35/632B33Y10/00B33Y70/00C04B2235/3217C04B2235/3232C04B2235/6026
Inventor 周婧段国林孙文彬卢林李迪夏晓光张静
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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