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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 .
Yttria-stabilized zirconia (YSZ) is a ceramic in which the cubic crystal structure of zirconium dioxide is made stable at room temperature by an addition of yttrium oxide. These oxides are commonly called "zirconia" ( Zr O 2 ) and "yttria" ( Y 2 O 3 ), hence the name.
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 ...
Zirconium dioxide This page was last edited on 25 October 2023, at 18:27 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
Organozirconium chemistry is the science of exploring the properties, structure, and reactivity of organozirconium compounds, which are organometallic compounds containing chemical bonds between carbon and zirconium. [2] Organozirconium compounds have been widely studied, in part because they are useful catalysts in Ziegler-Natta polymerization.
Zirconocene dichloride reacts with lithium aluminium hydride to give Cp 2 ZrHCl Schwartz's reagent: (C 5 H 5) 2 ZrCl 2 + 1 / 4 LiAlH 4 → (C 5 H 5) 2 ZrHCl + 1 / 4 LiAlCl 4. Since lithium aluminium hydride is a strong reductant, some over-reduction occurs to give the dihydrido complex, Cp 2 ZrH 2; treatment of the product mixture with methylene chloride converts it to Schwartz's reagent.
Baddeleyite is a rare zirconium oxide mineral (ZrO 2 or zirconia), occurring in a variety of monoclinic prismatic crystal forms. It is transparent to translucent, has high indices of refraction, and ranges from colorless to yellow, green, and dark brown.
Ultra-high-temperature ceramics (UHTCs) are a type of refractory ceramics that can withstand extremely high temperatures without degrading, often above 2,000 °C. [1] They also often have high thermal conductivities and are highly resistant to thermal shock, meaning they can withstand sudden and extreme changes in temperature without cracking or breaking.