MakeItFrom.com
Menu (ESC)
Home>Glass and Glass-CeramicUp Two>Borosilicate GlassUp One

Borosilicate Glass vs. Engineering Porcelain

Borosilicate glass belongs to the glass and glass-ceramics classification, while engineering porcelain belongs to the oxide-based engineering ceramics. There are 25 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 borosilicate glass and the bottom bar is engineering porcelain.

Borosilicate GlassEngineering Porcelain
Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 2000
590
Elastic (Young's, Tensile) Modulus, GPa 67 to 80
67 to 150
Flexural Strength, MPa 34 to 69
43 to 160
Fracture Toughness, MPa-m1/2 0.8
2.0
Knoop Hardness 510
600
Poisson's Ratio 0.21
0.17
Tensile Strength: Ultimate (UTS), MPa 280
130

Thermal Properties

Maximum Temperature: Mechanical, °C 360
1170
Maximum Thermal Shock, °C 160
170 to 290
Specific Heat Capacity, J/kg-K 830
600 to 1000
Thermal Conductivity, W/m-K 1.2
1.8 to 6.5
Thermal Expansion, µm/m-K 3.3 to 5.1
2.0 to 6.6

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 4.8 to 5.5
5.0 to 10
Dielectric Constant (Relative Permittivity) At 1 MHz 5.4
6.5
Dielectric Strength (Breakdown Potential), kV/mm 5.0 to 34
11 to 25
Electrical Dissipation At 1 Hz 0.0026 to 0.018
0.0043 to 0.028
Electrical Dissipation At 1 MHz 0.0017 to 0.0088
0.00043 to 0.013
Electrical Resistivity Order of Magnitude, 10x Ω-m 9.0 to 12
9.0 to 12

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
2.3 to 3.0

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
16 to 29
Stiffness to Weight: Bending, points 55 to 61
49 to 65
Strength to Weight: Axial, points 30 to 35
12 to 16
Strength to Weight: Bending, points 36 to 43
19 to 25
Thermal Diffusivity, mm2/s 0.54 to 0.63
0.73 to 3.9
Thermal Shock Resistance, points 50 to 91
11 to 53