③ ʻO ka mea maʻamau i hoʻohana ʻia i ka pōkā palaka mai ka 21st century, ua ulu wikiwiki nā seramika pale pōkā, a he nui nā ʻano, e like me ka alumina, silicon carbide, boron carbide, silicon nitride, titanium boride, etc., i waena o nā alumina ceramics (Al₂O₃), silikon carbide cera...