NON-POROUS CERAMIC COMPOSITE BASED ON ZIRCONIUM OXIDE Russian patent published in 2024 - IPC C04B35/488 C04B35/80 B82Y40/00 

FIELD: various technological processes.

SUBSTANCE: invention relates to production of dense strong ceramic composites based on zirconium dioxide, which can be used as catalysts, heat insulators, cutting tools, solid oxide fuel cells, bone tissue implants. Ceramic composite consists of matrix – zirconium oxide phase of tetragonal modification t-ZrO₂ with grain size of 0.7–1.1 mcm, filler – modified with yttrium oxide lanthanum hexaaluminate LaAl₁₁O₁₈ with grain size of 0.7–6.7 mcm and nanofibres Al₂O₃, obtained by electric explosion, with the following ratio of components, mol.%: [88ZrO₂/11CeO₂/Y₂O₃]:La_0.85Y_0.15Al₁₁O₁₈ =78:22 and 0.25 mol.% of nanofibres Al₂O₃. Composite is obtained by ceramic technology by stepped firing from 500 to 1,600 °C heating rate of 10 °C/min and isothermal holding for 20 hours in air and is characterized by apparent density of not less than 6.132 g/cm³; water absorption of 0%; open porosity of 0%; microhardness of not less than 16.7 GPa.

EFFECT: creation of dense nonporous composite with completely stabilized matrix t-ZrO₂, which has improved physical and mechanical properties, which provides high resistance to high temperatures, vibration and mechanical loads.

1 cl, 3 dwg, 5 tbl, 2 ex