# SiAlON vs. Granite

SiAlON belongs to the non-oxide engineering ceramics classification, while granite belongs to the natural stone. There are 18 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SiAlON and the bottom bar is granite.

Metric UnitsUS Customary Units

## Mechanical Properties

Compressive (Crushing) Strength, MPa | 2620 | |

2200 |

Elastic (Young's, Tensile) Modulus, GPa | 290 | |

70 |

Flexural Strength, MPa | 680 | |

24 |

Poisson's Ratio | 0.23 | |

0.25 |

Shear Modulus, GPa | 120 | |

27 |

Tensile Strength: Ultimate (UTS), MPa | 190 | |

39 |

## Thermal Properties

Maximum Temperature: Mechanical, °C | 1200 | |

350 |

Specific Heat Capacity, J/kg-K | 880 | |

840 |

Thermal Conductivity, W/m-K | 19 | |

2.7 |

Thermal Expansion, µm/m-K | 3.6 | |

7.4 |

## Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm | 8.3 | |

8.5 |

## Otherwise Unclassified Properties

Density, g/cm^{3} |
3.3 | |

2.9 |

## Common Calculations

Stiffness to Weight: Axial, points | 50 | |

14 |

Stiffness to Weight: Bending, points | 67 | |

48 |

Strength to Weight: Axial, points | 16 | |

3.8 |

Strength to Weight: Bending, points | 22 | |

9.0 |

Thermal Diffusivity, mm^{2}/s |
6.4 | |

1.1 |

Thermal Shock Resistance, points | 13 | |

5.4 |