| http://www.w3.org/ns/prov#value | - Examples of ceramic materials that are suitable for use in forming ceramic tiles 14 are aluminum oxide, zirconia toughened alumina, precipitation strengthened alumina, magnesium oxide, SiAlON (Silicon oxy-nitride) silicon carbide, silicon nitride, silicon oxide, boron carbide, aluminum borides, and boron nitride, titanium diboride or more generally from a group of oxides, boride, carbides, nitride
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