... : Ceramics Visitors are welcome to our factories. couteau de zirconium / zirconium knifeWe produce various kinds of Ceramic Kitchen Knife Set / ... ; industrial grade diamond sharpeners are usually used. Pure zirconium oxide is little used in industry due to its ... Magnesium, calcium and yttrium are often used to stabilize the zirconium oxide; yttrium provides the best mechanical properties, yielding a ...