METHOD OF OBTAINING POROUS CERAMIC MATERIAL

摘要

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 AlOor ultradisperse powder of ZrO-based hard solutions with dissolved in it MgO or YOcomponents, hydrosol Al(OH)or Zr(OH)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 AlO-based ceramic material reaches 1000-800 MPa, that of ZrO(Mg,Y)-based ceramic material being 800-650 MPa.EFFECT: increase of strength characteristics of material, possessing developed porosity.5 ex