Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing aluminum oxide-based composite biological ceramic material through in-situ reaction, and product prepared by method

A composite bioceramic and alumina-based technology, applied in the field of medical biomaterials, can solve the problems of difficult uniform dispersion of liquid phase and seed crystals, low molding density, poor bonding performance, etc., to avoid brittle transcrystalline plane fracture, mechanical The effect of excellent performance and simple preparation process

Active Publication Date: 2020-12-22
JINGDEZHEN CERAMIC INSTITUTE
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is to use various toughening methods to improve the dispersion mechanism of ceramic materials to applied stress, so that the material is less sensitive to defects.
[0005] The study found that the introduction of SiC whiskers into the alumina matrix can greatly improve the fracture toughness of the material, but the structure is easily destroyed due to the whiskers in the mass production, dispersion and subsequent sintering process, and the added whiskers and the matrix There are differences in chemical compatibility and physical thermal expansion coefficient, so the surface modification of whiskers is required; at the same time, due to the low molding density, it is not easy to sinter and compact, and a special sintering method is required, so the application of this method is restricted. restricted
The in-situ growth of plate-shaped crystals eliminates the difficulties caused by the use of whiskers in the process. Compared with single-phase alumina ceramics, although the mechanical properties have been greatly improved, there are still liquid phases and seeds in the alumina matrix. It is not easy to disperse evenly in the medium, the bonding performance with the matrix is ​​not good, and hot pressing sintering is required, which is not conducive to the realization of industrialized mass production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing aluminum oxide-based composite biological ceramic material through in-situ reaction, and product prepared by method
  • Method for preparing aluminum oxide-based composite biological ceramic material through in-situ reaction, and product prepared by method
  • Method for preparing aluminum oxide-based composite biological ceramic material through in-situ reaction, and product prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, a method for preparing an alumina-based composite bioceramic material by in-situ reaction, the steps are as follows:

[0029] (1) Weigh 89g alumina, 10g 3mol% Y 2 o 3 Stabilized zirconia, 1 g of praseodymium nitrate, and 0.89 g of polyacrylic acid were added to a planetary ball mill tank at a speed of 300 r / min for 8 hours with 50 mL of absolute ethanol as the medium to obtain a precursor slurry;

[0030] (2) Pour the above-mentioned precursor slurry into a rotary evaporating dryer and continue to heat and spin-dry at a water bath temperature of 60°C for 2 hours, then pass through a 100-mesh sieve to obtain a precursor powder;

[0031] (3) The above-mentioned precursor powder is granulated with a polyvinyl alcohol aqueous solution having a concentration of 5% (the amount of polyvinyl alcohol is 0.5 wt% of the mixed powder), and then dry-pressed under a pressure of 20 MPa to obtain a ceramic green body;

[0032] (4) The above-mentioned ceramic green...

Embodiment 2

[0034] In this embodiment, a method for preparing an alumina-based composite bioceramic material by in-situ reaction, the steps are as follows:

[0035] (1) Weigh 79g alumina, 20g 3mol% Y 2 o 3 Stabilized zirconia, 1g of praseodymium nitrate, and 1.58g of polyacrylic acid were added to a planetary ball mill tank with 50mL of absolute ethanol as the medium, and ball milled at a speed of 350r / min for 8 hours to obtain a precursor slurry;

[0036] (2) Pour the above-mentioned precursor slurry into a rotary evaporator dryer, continue heating and rotating at a water bath temperature of 60°C for 1 hour, and pass through a 100-mesh sieve to obtain a precursor powder;

[0037] (3) The above-mentioned precursor powder is granulated with a polyvinyl alcohol aqueous solution with a concentration of 5% (the amount of polyvinyl alcohol is 1 wt% of the mixed powder), and then dry-pressed under a pressure of 20 MPa to obtain a ceramic green body;

[0038] (4) The above-mentioned ceramic gr...

Embodiment 3

[0040] In this embodiment, a method for preparing an alumina-based composite bioceramic material by in-situ reaction, the steps are as follows:

[0041] (1) Weigh 75g alumina, 20g 3mol% Y 2 o 3 Stabilized zirconia, 5g of praseodymium nitrate, and 2.25g of polyacrylic acid were mixed with 50mL of absolute ethanol in a planetary ball mill tank at a speed of 400r / min for 8 hours to obtain a precursor slurry;

[0042] (2) Pour the above-mentioned precursor slurry into a rotary evaporating dryer and continue to heat and spin-dry at a water bath temperature of 60°C for 2 hours, then pass through a 100-mesh sieve to obtain a precursor powder;

[0043](3) The above-mentioned precursor powder is granulated with a polyvinyl alcohol aqueous solution with a concentration of 5% (the amount of polyvinyl alcohol is 1.5 wt% of the mixed powder), and then dry-pressed under a pressure of 20 MPa to obtain a ceramic green body;

[0044] (4) The above-mentioned ceramic green body is heated up to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
strengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing an aluminum oxide-based composite biological ceramic material by in-situ reaction. The method comprises the following steps: by using aluminum oxide, 3 mol% Y2O3-stabilized zirconium oxide and praseodymium nitrate as raw materials, carrying out ball-milling mixing, heating and rotary drying to obtain precursor powder; and granulating the precursor powder, carrying out dry pressing molding to obtain a ceramic green body, heating to 1400-1600 DEG C at a speed of 5-15 DEG C / min in an air atmosphere, carrying out heat preservation for 0.5-1.5 h, and carrying out furnace cooling to obtain the in-situ growth tabular crystal toughened alumina-based composite biological ceramic material. The invention also discloses a product prepared by the preparation method. According to the invention, the method is simple and convenient in process; and the toughening phase which is subjected to normal-pressure low-temperature sintering and in-situ synthesis isuniformly dispersed and is well combined with a matrix interface, the microstructure is uniform, and the compactness is high, so that the material has excellent mechanical properties and is suitablefor industrial mass production.

Description

technical field [0001] The invention relates to the technical field of medical biomaterials, in particular to a method for preparing an alumina-based composite bioceramic material by in-situ reaction and a product thereof. Background technique [0002] Alumina (Al 2 o 3 ) Ceramics have high hardness, excellent wear resistance and corrosion resistance, biocompatibility and biological inertness, so they are considered to be ideal artificial joint prosthesis, but there are also structural ceramics with high brittleness and low reliability. The inherent disadvantages limit its application as a bioceramic. [0003] The strength of single-phase alumina ceramics is usually 400-500MPa, and the fracture toughness is 3-4MPa m 1 / 2 about. However, the brittleness or toughness of the material at room temperature is affected by multiple factors such as the composition, structure, stress environment and conditions of the material, and the different microstructures inside the material w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/622C04B35/626C04B35/64
CPCC04B35/10C04B35/622C04B35/6261C04B35/62655C04B35/6264C04B35/62695C04B35/64C04B2235/3246C04B2235/3224C04B2235/3222C04B2235/6562C04B2235/6567C04B2235/443C04B2235/96
Inventor 汪永清洪毓鸿白明敏施德太
Owner JINGDEZHEN CERAMIC INSTITUTE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com