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Information @ a Glance

General

  • Zirconium dioxide (ZrO2), sometimes known as zirconia, is a white crystalline oxide of zirconium.
  • Zirconia occurs naturally, with a monoclinic crystalline structure, is the rare mineral, baddeleyite.
  • The high temperature cubic crystalline form, called 'cubic zirconia', is rarely found in nature as mineral tazheranite, but is synthesized in various colours for use as a gemstone.
  • Zirconium dioxide can occur as a white powder which possesses both acidic and basic properties.

Process

  • The isoeyntheeis process refers to the selective conversion of synthesis gas into branched aliphatic hydrocarbons over metal oxide catalysts.
  • Zirconium oxide can be prepared by the sol gel technique using inorganic precursors like ZroCl2 or metalorganic ones, as zirconium alkoxides.
  • Nanocrystalline zirconia dioxide was synthesized by sol-gel process from zirconium n-propoxide.

Application

  • Zirconium dioxide (zirconia) is a high performance ceramic used so far in dentistry for fabricating endodontic posts, crown/bridge restorations and implant abutments.
  • Zirconia has been also applied for the fabrication of esthetic orthodontic brackets.
  • Single crystals of the cubic phase of zirconia are commonly used as a substitute for diamond in jewellery.
  • Stabilized zirconia is used in oxygen sensors and fuel cell membranes because it has the ability to allow oxygen ions to move freely through the crystal structure at high temperatures.

Report
 

  • The clinical report describes a treatment for the replacement of the missing mandibular anterior tooth using a cantilever single lever resin bonded fixed partial denture, fabricated from zirconium dioxide ceramic.
  • Zirconia is also an important high-k dielectric material that is being investigated for potential applications as an insulator in transistors in future nanoelectronic devices.
  • The cubic phase of zirconia has a very low thermal conductivity, which has led to its use as a thermal barrier coating in jet turbine and diesel engines to allow operation at higher temperatures.

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