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Method for producing micro-structure controllable porous ceramic with agglutinating mould plate method

A technology of porous ceramics and template method, which is applied in the preparation of porous ceramics and the field of controllable porous ceramics, which can solve the problems of poor mechanical properties, serious stress concentration, and many pore wall defects.

Active Publication Date: 2008-05-07
SHANGHAI BIO LU BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that it is difficult to obtain products with high porosity, and the uniformity of pore distribution is also poor.
(2) Organic foam impregnation process, impregnating the ceramic slurry with organic foam, and burning off the organic foam after drying; although this method is suitable for preparing porous ceramics with high porosity and high open pores, its disadvantage is that there are many pore wall defects, The stress concentration is serious, resulting in poor mechanical properties
However, too large internal connection diameter will make the material fragile, while too small internal connection diameter will limit or hinder the blood supply in the material, affecting the formation of tissues and the establishment of functions

Method used

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  • Method for producing micro-structure controllable porous ceramic with agglutinating mould plate method
  • Method for producing micro-structure controllable porous ceramic with agglutinating mould plate method
  • Method for producing micro-structure controllable porous ceramic with agglutinating mould plate method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] To make porous ceramic products as shown in Figure 3, the raw material is pure alumina, which requires a diameter of 30 mm, a thickness of 7 mm, a porosity of more than 70%, a large pore diameter of about 500 μm, and a connection diameter of 120 μm. Specific steps are as follows:

[0032] (1) Make a plastic mold with an inner diameter of 35mm and a height of 20mm, and touch bolts up and down.

[0033] (2) Use standard sieves to screen out polystyrene particles with a diameter of 500-600 μm.

[0034] (3) According to Fig. 2, add 12 grams of benzoyl peroxide catalyst in 100 ml methyl methacrylate (MMA) binder, mix evenly and react completely.

[0035] (4) Add the prepared binder to the selected polystyrene granules, the amount of binder added is 10ml / 100g plastic granules, and the plastic granules and the binder are evenly mixed for 3 minutes.

[0036] (5) Put the polystyrene particles coated with adhesive on the surface into the mould, pressurize the upper mold plug at 0...

Embodiment 2

[0041] Make a porous gradient bioceramic product with small outer holes and large core holes as shown in Figure 4. The outer layer is small holes and has a certain mechanical strength, and the other parts are large holes that will guide the attachment of cells and the direction of new blood vessels. There is a medullary cavity in the center, which is conducive to obtaining sufficient blood supply and nutrition. The raw material is pure β-tricalcium phosphate, which requires a diameter of 30mm, a thickness of 7mm, a porosity of more than 70%, a large pore diameter of about 600μm, and a connecting neck of 180μm. Specific steps are as follows:

[0042] (1) Make a plastic mold with an inner diameter of 35mm and a height of 20mm, and touch bolts up and down.

[0043] (2) Use a standard type of sieve to screen out polystyrene particles with a diameter of 600-700 μm and a diameter of 100-150 μm, respectively.

[0044] (3) according to Fig. 2, add the benzoyl peroxide catalyst of 14...

Embodiment 3

[0051] To produce the porous gradient ceramic block-shaped product as shown in Figure 5, the raw material is CaO-stabilized zirconia, and the length, width and height are required to be 50mm, 10mm and 20mm respectively. The porosity is more than 70%, the diameter of the macropore is about 500 μm, and the connection neck in the hole is 60 μm. Specific steps are as follows:

[0052] (1) Make plastic molds with length, width and height of 60mm, 30mm and 15mm respectively.

[0053] (2) Using a standard type of sieve, sieve out polyethylene particles with a diameter of 500-600 μm and a diameter of 50-100 μm, respectively.

[0054] (3) According to Figure 2, add 8 grams of benzoyl peroxide catalyst to 100 ml of methyl methacrylate (MMA) binder, mix evenly and react completely.

[0055] (4) Add the prepared methyl methacrylate binder to the selected polystyrene granules of two sizes. The amount of the binder is 10ml / 100g of the plastic granule quality. Mix the agent thoroughly and...

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Abstract

The invention mainly relates to a preparation method of porous ceramics. The controllable microstructure porous ceramics is prepared by the bonding template method, which is characterized in that a binder is used to bond plastic particles to form a framework template, and by adjusting the concentration of the binder, the size of the bonding point between the plastic particles is controlled to achieve the control of making porous ceramics. The size of the internal connection diameter of the ceramic; then the grouting molding template is replicated, and finally the corresponding product is obtained by sintering. The porosity of the porous ceramics prepared by the method can be controlled between 50-90%, the pore diameter can be controlled between 10-7000 microns, and the internal connection diameter of the holes can be controlled between 1-3000 microns. This method can be used to prepare porous ceramics with uniform pore size and porous gradient ceramic materials.

Description

technical field [0001] The invention relates to a method for preparing porous ceramics, more precisely, a method for preparing porous ceramics with controllable microstructure by using a bonding template method, which belongs to the technical field of ceramic materials. Background technique [0002] Porous materials refer to materials with a certain size and number of pore structures. Among them, porous ceramics are a new type of ceramic materials, also known as porous functional ceramics. porous ceramic products. Porous ceramics are widely used in biological, medical, metallurgy, energy, environmental protection, chemical and other fields as biological materials, industrial solid-liquid separation materials, liquid filtration and purification materials, gas purification materials, chemical reaction catalyst carriers, sound-absorbing and heat-insulating materials, etc. It has attracted great attention from the global material science community, and has developed rapidly, wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B38/06
Inventor 张法明常江卢建熙
Owner SHANGHAI BIO LU BIOMATERIALS
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