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Process for preparing porous ceramic by water-based gel injection moulding method

A technology of water-based gel injection molding and porous ceramics, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problem of undiscovered porous bioceramics, etc., and achieve the effect of increasing apparent porosity

Inactive Publication Date: 2003-11-19
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] Through a large number of literature searches, no report was found on the preparation of porous bioceramics by combining gel injection molding technology and pore-forming agent method

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  • Process for preparing porous ceramic by water-based gel injection moulding method

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[0021] The β-TCP porous ceramics were successfully prepared by water-based gel injection molding combined with the pore-forming agent method. The apparent porosity of the ceramics can reach more than 80%, and the strength can reach 3-5 MPa. The specific process is as follows:

[0022] 1. Preparation of powder:

[0023] (1) The β-TCP ceramic powder is synthesized by a solid-state reaction method. The powder is ball milled for 24 hours, dried and passed through a 40-mesh sieve for use.

[0024] (2) The high-temperature binder is melted-quenched, and then ground into powder.

[0025] 2. Preparation of β-TCP slurry with low viscosity and high solid content:

[0026] Distilled water is selected as the dispersion medium, and the dispersant is ammonium polyacrylate (PMAA-NH 4 ), mix and dissolve the organic monomer (AM), cross-linking agent (MBAM) and distilled water in a mass ratio of 10:1:50, and then mix and dissolve the β-TCP ceramic powder (β-TCP powder and high-temperature b...

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Abstract

An injection moulding process for preparing porous ceramics from water-base gel includes such steps as preparing the stable suspension from organic monomer, cross-linking agent, trigger, disperser and ceramic powder, proportionally adding surface treated pore-forming agent while applying pressure, proportionally adding catalyst, slowly heating to 60-80 deg.C holding the temp for at least 30 min for solidifying, demoulding, drying and sintering.

Description

technical field [0001] The invention relates to a method for preparing porous ceramics, in particular to a method for preparing porous bioceramics by combining a water-based gel injection molding method and a pore-forming agent method. Background technique [0002] Porous bioceramics have been widely used in clinical orthopedics because of their good biocompatibility and structural properties conducive to bone tissue ingrowth. Recently, with the development of bone tissue engineering, porous bioceramics are required not only to have biodegradable properties, but also to have as many three-dimensional connected pores as possible and as high a porosity as possible. Surface area, apparent porosity and strength are effectively controlled. At present, the methods for preparing porous ceramics include adding pore-forming agents, in-situ forming methods, foam impregnation methods, sol-gel methods, and the like. Among them, the method of adding a pore-forming agent, since the type...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00
Inventor 陈晓明成国煌邢辉李世普
Owner WUHAN UNIV OF TECH
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