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Method for preparing ceramic microspheres by template method

A technology of ceramic microspheres and template method, which is applied in the field of ceramic materials, can solve the problems of difficulty in obtaining porous ceramic microspheres with large pore size and high connectivity porosity, long solidification time, and easy bursting of bubbles, so as to achieve consistent appearance and pollution The effect of reducing chance and stabilizing chemical composition

Active Publication Date: 2022-02-22
SHANGHAI BIO LU BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When preparing porous ceramic microspheres by the foaming method, it is difficult to obtain porous ceramic microspheres with large pore size and high connectivity porosity due to the long solidification time of the ceramic slurry and the bubbles are easy to rupture.
The method of adding a pore-forming agent is simple to operate, and ceramic preforms with complex shapes and different pore shapes can be produced. However, the porous ceramic microspheres prepared by this method often have more closed cells.

Method used

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  • Method for preparing ceramic microspheres by template method
  • Method for preparing ceramic microspheres by template method
  • Method for preparing ceramic microspheres by template method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0064] Step S1, adding polymethyl methacrylate (PMMA) organic microspheres (φ600μm~800μm) into a stainless steel cylindrical mold (φ100cm×100cm), after shaking and filling, heating the whole to 220°C for 6 hours , so that contact bonding occurs between the organic microspheres (such as image 3 shown), then cooled to form a removable organic framework;

[0065]Step S2, ball milling and mixing the calcium carbonate ceramic powder, dispersant, defoamer and solvent to prepare a calcium carbonate ceramic slurry with good fluidity; pour the calcium carbonate ceramic slurry into the organic frame, and dry to form Calcium carbonate ceramic body; debinding the calcium carbonate ceramic body at 350°C for 8 hours to obtain a removable inorganic template;

[0066] Step S3, ball milling and mixing the tricalcium phosphate ceramic powder, dispersant, defoamer and solvent to prepare a tricalcium phosphate ceramic raw material with good fluidity; pouring the tricalcium phosphate ceramic raw...

no. 2 example

[0070] Step S1, add polymethyl methacrylate (PMMA) organic microspheres (φ600μm~800μm) into a stainless steel cylindrical mold (φ100cm×100cm), after shaking and filling, add acetone at room temperature for 2 minutes, and use pure Washing with water terminates the dissolution of acetone on the surface of organic microspheres, and bonds to form a removable organic framework;

[0071] Step S2, ball milling and mixing the calcium carbonate ceramic powder, dispersant, defoamer and solvent to prepare a calcium carbonate ceramic slurry with good fluidity; pour the calcium carbonate ceramic slurry into the organic frame, and dry to form Calcium carbonate ceramic body; debinding the calcium carbonate ceramic body at 350°C for 8 hours to obtain a removable inorganic template;

[0072] In step S3, tricalcium phosphate ceramic powder, hydroxyapatite ceramic powder, dispersant, defoamer and solvent are mixed by ball milling to prepare tricalcium phosphate and hydroxyapatite dual-phase cera...

no. 3 example

[0076] Step S1, adding polymethyl methacrylate (PMMA) organic microspheres (φ600μm~800μm) into a stainless steel cylindrical mold (φ100cm×100cm), after shaking and filling, adding a binder at room temperature for 35 minutes, Rinse off the remaining adhesive with pure water to terminate the bonding to form a removable organic framework;

[0077] Step S2, ball milling and mixing the calcium carbonate ceramic powder, dispersant, defoamer and solvent to prepare a calcium carbonate ceramic slurry with good fluidity; pour the calcium carbonate ceramic slurry into the organic frame, and dry Forming a calcium carbonate ceramic body; the calcium carbonate ceramic body is subjected to debinding at 350°C for 8 hours to obtain a removable inorganic template;

[0078] Step S3, ball milling and mixing hydroxyapatite, PMMA pore-forming agent particles (φ1 μm-5 μm), dispersant, defoamer and solvent to prepare a hydroxyapatite ceramic raw material with good fluidity; the hydroxyapatite Limest...

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Abstract

The invention provides a method for preparing ceramic microspheres by a template method. The solution is as follows: firstly, an erasable organic framework is precisely prepared, and an erasable inorganic template is reproduced according to the framework; then ceramic raw materials are filled into the inorganic template , form ceramics by high-temperature sintering; finally, the inorganic template material is transformed into an invisible structure by special means, and ceramic microspheres with a tangible structure are obtained. The technical scheme of the present invention makes the chemical composition of the prepared ceramic microspheres stable, and the probability of contamination is reduced; it also makes the prepared ceramic microspheres uniform in particle size, uniform in appearance and controllable in structure; it also makes the prepared ceramic microspheres have high porosity and high connectivity.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a method for preparing ceramic microspheres by a template method. Background technique [0002] Ceramic microspheres refer to inorganic non-metallic materials with diameters ranging from micrometers to millimeters, which are in the form of spheres or approximate spheres, and have various forms such as dense and porous microspheres. Ceramic microspheres are often used in the field of medicine because of their good fluidity, filling properties, and special physical and chemical properties. Among them, porous ceramic microspheres combine the high specific surface area of ​​porous materials and the physical and chemical stability of ceramic materials, so that they have the characteristics of high packing density, high temperature resistance, corrosion resistance, good chemical stability, and high mechanical strength. [0003] At present, the commonly used preparation methods of poro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/447C04B35/622C04B35/626C04B35/638
CPCC04B35/447C04B35/622C04B35/62605C04B35/638C04B2235/3208C04B2235/6022C04B2235/6567
Inventor 卢建熙卢霄
Owner SHANGHAI BIO LU BIOMATERIALS
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