THIN CERAMIC COMPONENTS OBTAINED BY FUSION AND MOLDING A COMPOSITION OF THE AL2O-ZRO2-SIO2-K2O SYSTEM HAVING GOOD PROPERTIES OF MECHANICAL STRENGTH AND ABRASION RESISTANCE

摘要

The invention relates to ceramic parts. /P P It relates to a part made of ceramic material shaped by melting and molding of a composition based on alumina, zirconia, silica and an oxide. of alkali metal, said part having, on at least one of its parts, a thickness less than or equal to 30 mm and being intended for an application where mechanical strength and / or abrasion resistance are of paramount importance, characterized in which it has the following chemical composition, in% by weight based on the oxides: /P P Al2 O3: 40 - 75 /P P ZrO2: 20 - 45 /P P SiO2: 5 - 20 /P P Na2 O: 0 - 2.7 /P P K2 O: 0.15 - 4.25 /P P Fe2 O3 + TiO2 + CaO + MgO: 0 - 2, with the conditions that i each of Fe2 O3, TiO2, CaO and MgO does not exceed 0.7% by weight, and ii that the weight ratio: Na2 O + K2 O / 1, 52SiO2 is between 0.07 and 0.14 inclusive. /P P Application as micronizer disc, pump wearing part, and abrasion resistant slab.