Ceramic Aluminum Nitride vs. Plastic PPS GF40

Compare Ceramic Aluminum Nitride vs. Plastic PPS GF40 strength, stiffness, weight and thermal properties.

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Ceramic Aluminum NitrideSintered ceramic (pressed and fired)

Plastic PPS GF40Bulk polymer (molded or machined)

Mechanical
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Yield strength	not sourced	not given (tensile used)
Ultimate tensile strength	not sourced	195MPasourcetensile strength, 5 mm/min
Flexural strength	310MPasource3-point bending strength (JIS R 1601)	285MPasourceflexural strength at break
Elongation at break	not sourced	1.9%sourcestrain at break, 5 mm/min
Young's modulus (stiffness)	320GPasourcetypical (JIS R 1602)	14.7GPasourcetypical, 1 mm/min
Density	3,400kg/m³sourcetypical (JIS R 1634)	1,650kg/m³sourcetypical
Strength to weight	not sourced	118kN·m/kg
Stiffness to weight	94.1MN·m/kg10.6x higher	8.91MN·m/kg
Poisson's ratio	0.24sourcetypical (JIS R 1602)	0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific)
Shear modulus	129GPa23.7x stiffer in shear	5.44GPa
Bulk modulus	205GPa	16.3GPa
Speed of sound	9,701m/s	2,985m/s
Thermal
Thermal conductivity	150W/m·Ksourcetypical (JIS R 1611)	0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific)
Thermal expansion	4.6µm/m·Ksourcemean, 40-400 °C (JIS R 1618)	12µm/m·Ksourceparallel (flow), mean -50 to 90 °C
100 mm part over a 50 °C swing	23µm growth2.61x less	60µm growth
Specific heat	710J/kg·Ksourcetypical (JIS R 1611)	not sourced
Heats up and cools (diffusivity)	62.1mm²/s	not sourced
Thermal shock resistance	not sourced	144W/m
Melting point	not sourced	280°CsourceDSC, 10 °C/min
Glass transition	not sourced	90°CsourceDSC, 10 °C/min
Max service temperature	not sourced	270°CsourceHDT 1.8 MPa
Values for	KYOCERA AN216A dense sintered aluminium nitride, typical values; KYOCERA Fineceramics Europe data sheet 2023.04.03	Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013).

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 PPS GF40?

Plastic PPS GF40 is lighter: 1,650 kg/m³ against 3,400 kg/m³ for Ceramic Aluminum Nitride.

Which is stiffer, Ceramic Aluminum Nitride or Plastic PPS GF40?

Ceramic Aluminum Nitride is stiffer: Young's modulus 320 GPa against 14.7 GPa for Plastic PPS GF40, 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 PPS GF40?

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 PPS GF40
Stiff rod or tie (tension)	lighter	10.6x heavier
Stiff beam (bending)	lighter	2.26x heavier
Stiff panel or plate	lighter	36% 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 PPS GF40?

Ceramic Aluminum Nitride conducts heat better: 150 W/m·K against 0.2 W/m·K for Plastic PPS GF40.

Which expands less with temperature?

Ceramic Aluminum Nitride expands less: 4.6 µm/m·K against 12 µm/m·K for Plastic PPS GF40.

Among 72 materials

Stiffness against density

Strength against density