Zirconyl chloride dihydrate

Preparation of unstabilized zirconia. Zirconia is usually produced from zircon flour. Although the carbochlorination of zircon produces zirconium tetrachloride that can be oxidized to yield zirconia, such a method is only restricted to the production of zirconium metal (see Zirconium and Zirconium alloys). Therefore, to produce zirconia from zircon, the first step is to convert zircon to zirconyl chloride dihydrate. The process starts with the preparation of disodium metazirconate (Na ZrOj) by digesting zircon into molten sodium hydroxide as follows ... 

There are two methods used to make zirconia from zirconyl chloride dihydrate (Zr0Cl2.8H20) thermal decomposition and precipitation. 

In the thermal decomposition method, upon heating above 200°C, zirconyl chloride dihydrate loses its hydratation water as follows ... 

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See also in sourсe #XX -- [ ]

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