Item

test condition

           Unit

Index

Color

white

Density

g/cm3

3.7

Hardness

load 4.9N

GPa

≥15

Bending Strength

MPa

≥274

Expansion coefficient

20~500°C

 1×10-6mm/°C

6.5~7.5

20~800°C

6.5~8.0

Thermal conductivity

20°C

             W/(m·K)

≥20.9

Specific heat

              kJ/(kg·K)

≥0.8

Insulation intensity

KV/mm

≥12

Volume resistivity

20°C

          Ohm.cm

≥1014

300°C

≥1011

                 500°C

≥109

Dielectric constant

1MHz

9~10

Dielectric loss Angle tangent

1MHz

≤3×10-4

Roughness of surface

μm

0.3~0.8