2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)
Heats up and cools (diffusivity)
62.1mm²/s298x faster
0.208mm²/s
Thermal shock resistance
not sourced
56.9W/m
Values for
KYOCERA AN216A dense sintered aluminium nitride, typical values; KYOCERA Fineceramics Europe data sheet 2023.04.03
LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Which is lighter, Ceramic Aluminum Nitride or Plastic HDPE?
Plastic HDPE is lighter: 950 kg/m³ against 3,400 kg/m³ for Ceramic Aluminum Nitride.
Which is stiffer, Ceramic Aluminum Nitride or Plastic HDPE?
Ceramic Aluminum Nitride is stiffer: Young's modulus 320 GPa against 0.9 GPa for Plastic HDPE, so the same part in Ceramic Aluminum Nitride deflects less under the same load.
Which is lighter for the same job, Ceramic Aluminum Nitride or Plastic HDPE?
For the same stiffness or strength: Ceramic Aluminum Nitride is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.
Part that must be
Ceramic Aluminum Nitride
Plastic HDPE
Stiff rod or tie (tension)
lighter
99.3x heavier
Stiff beam (bending)
lighter
5.27x heavier
Stiff panel or plate
lighter
1.98x heavier
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Ceramic Aluminum Nitride or Plastic HDPE?
Ceramic Aluminum Nitride conducts heat better: 150 W/m·K against 0.445 W/m·K for Plastic HDPE.
Which expands less with temperature?
Ceramic Aluminum Nitride expands less: 4.6 µm/m·K against 120 µm/m·K for Plastic HDPE.