MakeItFrom.com
Menu (ESC)
Home>ThermoplasticUp Three>Otherwise Unclassified ThermoplasticUp Two>PEEKUp One

PEEK vs. Hafnia

PEEK and hafnia belong to fundamentally different material chemistries. PEEK is a polymeric material, while hafnia is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is PEEK and the bottom bar is hafnia.

Polyetheretherketone (PEEK)Hafnia (Hafnium Oxide, HfO2)
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 4.0 to 24
57

Thermal Properties

Maximum Temperature: Mechanical, °C 330
2800
Melting Onset (Solidus), °C 340
2900
Specific Heat Capacity, J/kg-K 1390 to 1700
120
Thermal Conductivity, W/m-K 0.25 to 0.93
1.1
Thermal Expansion, µm/m-K 15 to 52
6.0

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 3.0 to 14
9.0

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.5
9.7

Common Calculations

Stiffness to Weight: Axial, points 1.5 to 10
3.3
Stiffness to Weight: Bending, points 36 to 73
13
Thermal Diffusivity, mm2/s 0.1 to 0.51
0.95