Comparison of the insulation of air ceramic mica
Resistivity: the volume resistivity and surface resistivity of mica are very high, which is similar to that of hard rubber and ceramics. Muscovite were 1014~1015 cm cm and 1011~1012 cm cm; Au mica was 1013~1014 cm cm and 1010~1011 cm cm, respectively. Are greater than industrial requirements.
Dielectric loss tangent: the parameter that indicates the quality of electrical insulation materials. The smaller the dielectric loss tangent is, the better the quality of the material. The dielectric loss tangent of mica is smaller than that of other electrically insulating materials.
Dielectric strength: breakdown voltage of a dielectric per unit thickness. The actual dielectric strength varies with the thickness of the mica sheet. The average Muscovite is perpendicular to the cleavage with a nominal value of 72~410 kV / mm, along the cleavage range of 0.8 to 2 thousand and 500 volts / mm. Test method see breakdown voltage test". The dielectric strength of mica sheets shall be greater than 146 thousand and 500 volts / mm and 160 thousand volts / mm.
