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Discovered in 1892, the yellowish monoclinic mineral baddeleyite is a natural form of zirconium oxide. [2] The high melting point of zirconia (2750 °C or 4976 °F) hinders controlled growth of single crystals. However, stabilization of cubic zirconium oxide had been realized early on, with the synthetic product stabilized zirconia introduced ...
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Zirconium also finds uses in flashbulbs, biomedical applications such as dental implants and prosthetics, deodorant, and water purification systems. Zirconium compounds have no known biological role, though the element is widely distributed in nature and appears in small quantities in biological systems without adverse effects.
Zirconium dioxide (ZrO 2 ), sometimes known as zirconia (not to be confused with zirconium silicate or zircon ), is a white crystalline oxide of zirconium . Its most naturally occurring form, with a monoclinic crystalline structure , is the mineral baddeleyite .
Corrosion resistance of zirconium alloys is enhanced by intentional development of thicker passivation layer of black lustrous zirconium oxide. Nitride coatings might also be used. Whereas there is no consensus on whether zirconium and zirconium alloy have the same oxidation rate, Zircaloys 2 and 4 do behave very similarly in this respect.
A ceramic knife is a knife with a ceramic blade typically made from zirconium dioxide (ZrO 2; also known as zirconia), [1] rather than the steel used for most knives. Ceramic knife blades are usually produced through the dry-pressing and firing of powdered zirconia using solid-state sintering .
This ability to conduct O 2− ions makes yttria-stabilized zirconia well suited for application as solid electrolyte in solid oxide fuel cells. For low dopant concentrations, the ionic conductivity of the stabilized zirconias increases with increasing Y 2 O 3 content. It has a maximum around 8–9 mol% almost independent of the temperature ...
Another oxide usually found in refractories is the oxide of calcium . [5] Fire clays are also widely used in the manufacture of refractories. Refractories must be chosen according to the conditions they face. Some applications require special refractory materials. [6] Zirconia is used when the material must withstand extremely high temperatures ...