METHOD OF OBTAINING POROUS CERAMIC MATERIAL Russian patent published in 2013 - IPC C04B38/00 C04B35/486 C04B35/111 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of obtaining porous ceramic material and is intended for obtaining artificial endoprosthesis of bone tissue. Method of obtaining porous ceramic material includes preparation of mixture from ceramic powder and additive, having the function of plasticiser and pore-forming agent, formation of product with required configuration from powder mixture and further sintering. As ceramic powder used is ultradisperse powder Al₂O₃ or ultradisperse powder of ZrO₂-based hard solutions with dissolved in it MgO or Y₂O₃ components, hydrosol Al(OH)₃ or Zr(OH)₄ in amount from 1 to 50 vol.% from mixture volume being used as plasticiser and pore-forming agent. In order to give mixture forming properties distilled water is added. Formation of product with required configuration is carried out by pressing under pressure 12-25 kN, sintering is performed at temperature1450-1600°C with isothermal exposure for 1-5 hours. With 20-45% porosity ultimate compressive strength of Al₂O₃-based ceramic material reaches 1000-800 MPa, that of ZrO₂(Mg,Y)-based ceramic material being 800-650 MPa.

EFFECT: increase of strength characteristics of material, possessing developed porosity.

5 ex