Common: Al2O3, B2O3, BaO, C, CaO, CO2, CoO, Cr2O3, Cu2O, CuO, Fe2O3, FeO, H2O, K2O, Li2O, LOI, MgO, MnO, MnO2, Na2O, NiO, O, Organics, P2O5, PbO, SiO2, SnO2, SO3, SO4, SrO, TiO2, V2O5, ZnO, ZrO, ZrO2, Others

ZrO2 (Zirconium Dioxide)

Family:Opacifier
Weight:123.220
Expansion:0.020
Fusion:2700C

(Sources: Zircon opacifiers, Zirconium silicate)

-Zirconium oxide is an extremely refractory material and its metallic form likewise melts very high.

-It is primarily used as an opacifier in glazes with properties similar to tin oxide. Tin is about twice as effective in producing opacity. The opacifying effects of zirconium are a product of its ability to form a second crystal phase.

-In amounts below 5%, where it does not yet opacify, zircon can be added to transparent glazes to produce a harder surface.

Properties

  • Fusion - 2900C

    From The Oxide Handbook

  • Glaze Opacifier - White

    Zirconium is an effective opacifier, especially in the Zirconium Silicate form. Parent materials of finer particle size are more effective.
    In lead glazes a cream tint is likely. Glazes high in boron or alkalis, or low in alumina and silica may not opacify well.

Authors

  • Tony Hansen (Owner)

Others: Ag2O, As2O3, As4O6, Au2O3, BeO, Bi2O3, CdO, CeO2, Cl, Cs2O, CuCO3, Dy2O3, Er2O3, Eu2O3, F, Fr2O, Free SiO2, Ga2O3, GdO3, GeO2, HfO2, HgO, Ho2O3, In2O3, IrO2, KNaO, La2O3, Lu2O3, Mn2O3, MoO3, N2O5, Nb2O5, Nd2O3, Ni2O3, OsO2, Pa2O5, PdO, PmO3, PO4, Pr2O3, PrO2, PtO2, RaO, Rb2O, Re2O7, RhO3, RuO2, Sb2O3, Sb2O5, Sc2O3, Se, Sm2O3, Ta2O5, Tb2O3, Tc2O7, ThO2, Tl2O, Tm2O3, Trace, U3O8, UO2, WO3, Y2O3, Yb2O3,



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