Dense and durable ceramics based on alumina and zirconia

• Published in: Refractories and industrial ceramics 2004-11, Vol.45 (6), p.421-423
• Main Authors: Lukin, E S, Anufrieva, E V, Makarov, N A, Popova, N A, Kuteinikova, A L
• Format: Article
• Language: English
• ISSN: 1083-4877; 1573-9139
• DOI: 10.1007/s11148-005-0025-2

Dense corundum ceramic, owing to its advantageous properties such as high mechanical strength, hardness, resistance to wear, refractoriness, thermal conductivity, and chemical stability, has found numerous applications in industry, in particular, in electronics and in electrical and structural engineering. One may quote as an example, VK-94-1, VK-100-1, TsM-332 (microlite), kartinite, minalundum, sicor, coral-2, to name but a few. They differ in microstructure, phase composition, and properties. Of these products, those with a poreless, fine-crystalline, and homogeneous structure are leading candidates for wider application in most sectors of industry. The strength parameters of corundum materials may vary from 300 to 750 MPa depending on the additives used and fabrication technology. With highly dispersed powders, the bending strength of 700 - 750 MPa can be reached by using a hot-pressing method, or by sintering in a gasostat Commercial Al2O3 treated by the conventional sintering technology gives products with a bending strength of 300 - 450 Mpa.