Material Use Guide for ZIRCONIUM OXIDE

BASIC PROPERTIES OF ZIRCONIUM OXIDE
(for pure material/fully dense; may differ from coating)

Formula weight, ZrO₂......................................................................... 123.22
Density (Theoretical)..................................................... Approx. 5.6 g/cm³
Crystal Structure.............................................................. Cubic/Monoclinic
Color..................................................................................................... Cream
Emissivity (at 1300 K).............................................................................0.45
Electrical Resistivity
(at 298 K).......................................................................... 10⁷ - 10⁸ ohm-cm
(at 1275 K)........................................................................ 10² - 10³ ohm-cm
Knoop Microhardness (kg/mm²@100-g.load; at 298 K).................1300
Thermal Expansion.................................... 8 to 10.5 x10^-6/C; 25-1000 C
Specific Heat (at 298 K)......................................................... 0.109 cal/g K
Thermal Conductivity
(at 373 K)................................................................... 0.005 cal / (cm-sec-K)
 (at 1673 K)............................................................. 0.006 cal / (cm-sec-K)
Use Temperatures for ZrO2..................................... 2000 C Inert/Vacuum
 ........................................1350-1400 C Reducing/Vacuum with Carbon
...........................................................................................>2000 C Oxidizing*
         [*note some coatings are not for air/oxidizing use]
Melting Point......................................................................... Approx. 2600 C

 

COMPATIBILITY DATA

Reportedly Stable at High Temperatures
(Minimum Interaction)

Al, Pt, Rh, Zr, Nb, Ta, Mo, W, U, Cu, Fe, Pb, Cr, Mn, Zn, Bi, Be, Ni, Co, Si, PbO, Pd, Ru, Ti or MoSi₂ (reacts slightly), Acidic Slags, Steels, Titanates (below melting)
 

Reacts at High Temperatures
(Unstable)

Basic Steel Slags, CuO, C (>1350-1400 C, vacuum), Na, Ca, Sr, Ba, Li, K, Na₂CO₃

Data for the pure materials. Performance of the coatings may differ. Given for general information only; some interaction may occur at certain temperature and environmental conditions; it is advised that investigators evaluate their specific systems based on a thorough search of the literature. Many materials may be compatible/stable but were not known to us -- this list should not be considered exaustive.