CERAMIC-MATERIAL COMPOSITION, SINTERED CERAMIC MATERIAL, CONVEX-CONCAVE CERAMIC PLATES, PROCESSES FOR PRODUCING SAME, USE THEREOF FOR PREPARING IMPACT-RESISTANT COMPONENTS, IMPACT-RESISTANT ARTICLES AND USE THEREOF IN ARMOUR FOR BALLISTIC PROTECTION

摘要

The present invention provides: a ceramic-material composition containing alumina and niobium oxide and the process for preparing same; a sintered ceramic material which contains said composition and the process for preparing same; convex-concave ceramic-material plates and the process for preparing same; the use of said composition, ceramic material and/or convex-concave ceramic-material plates for preparing impact-resistant articles; ballistic-impact-resistant articles and the processes for producing same. The products of the invention provide substantial improvement in impact-protection performance, reduce the quantity of material required in order to obtain the same level of impact protection, and provide advantages concerning industrial production thereof. Said products can be used for personal, car and building protection against projectiles with kinetic energy and hollow-charge jets. Said convex-concave ceramic plates can be prepared with different thicknesses and curvatures, of both the front and rear surfaces, according to the ballistic-protection requirements.