# Yttria Partially Stabilized Zirconia (TZP)

TZP is a grade of zirconia. The graph bars on the material properties cards below compare TZP to other oxide-based engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

## Mechanical Properties

Compressive (Crushing) Strength

3080 *MPa* 450 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

200 *GPa* 29 *x 10 ^{6} psi*

Flexural Strength

970 *MPa* 140 *x 10 ^{3} psi*

Fracture Toughness

11 *MPa-m ^{1/2}* 9.9

*x 10*

^{3}psi-in^{1/2}Knoop Hardness

1300

Poisson's Ratio

0.25

Tensile Strength: Ultimate (UTS)

450 *MPa* 65 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

1330 *°C* 2430 *°F*

Maximum Thermal Shock

310 *°C* 590 *°F*

Specific Heat Capacity

510 *J/kg-K* 0.12 *BTU/lb-°F*

Thermal Conductivity

2.2 *W/m-K* 1.3 *BTU/h-ft-°F*

Thermal Expansion

9.3 *µm/m-K*

## Other Material Properties

Density

6.0 *g/cm ^{3}* 370

*lb/ft*

^{3}Dielectric Constant (Relative Permittivity) At 1 MHz

28

Dielectric Strength (Breakdown Potential)

9.0 *kV/mm* 0.35 *V/mil*

Electrical Resistivity Order of Magnitude

11 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

19 *points*

Stiffness to Weight: Bending

33 *points*

Strength to Weight: Axial

21 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

0.73 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Followup Questions

## Further Reading

Ceramic and Glass Materials: Structure, Properties and Processing, James F. Shackelford and Robert H. Doremus (editors), 2008

Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005