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Electrical properties

Technical Ceramic materials offer for use as insulation material the fundamental electrical characteristics:

  • very good insulation usage
  • high voltage breakdown strength
  • low dielectrical loss

Further, more detailed information to this in the Breviary

*value indication not common 2) in German language sometimes called special steatite
Subgroup as per
IEC 672		 Designation Loss factor at 20 °C
48 bis 62 HZ
tandpf [10-3]		 Permittiviy factor 
48 bis 62 HZ
er		 Voltage breakdown strength, mi
Ed [kV mm-1]		 Specific resistance at
20 °C / 200 °C
pv20 [Wm]
C 110 Siliceous porcelain 25 6 - 7 20 1011
C 120 Aluminous porcelain 25 6 - 7 20 1011
C 130 Aluminous porcelain 30 6 - 7,5 20 1011
C 220 Steatite 5 6 15 1011
C 221 High-frequency steatite2) 1,5 6 20 1011
C 230 Special steatite porous * * * 108
C 310 Titan dioxide * 40 - 100 8 1010
C 410 Cordierite 25 5 10 1010
C 511 Porous cordierite ceramics * * * 107
C 520 Porous cordierite ceramics * * * 107
C 530 Porous cordierite ceramics * * * 108
C 610 Alumino silicate (50-65% AI2O3) * 8 17 1011
C 620 Alumino silicate (65-80% AI2O3) * 8 15 1011
C 780 Alumina (80-86% AI2O3) 1 8 10 1012
C 786 Alumina (86-95% AI2O3) 0,5 9 15 1012
C 795 Alumina (95-99% AI2O3) 0,5 9 15 1012
C 799 Alumina (>99% AI2O3) 0,2 9 17 1012
C 810 Beryllia 1 7 13 1012
C 820 Magnesia * 10 * *
C 910 Aluminium nitride 2 * 20 1012
C 930 Silicon nitride, reaction bonded 2 * * *
C 935 Silicon nitride, dense 2 8-12 20 1011

We recommend to the manufacturer for specific data, because data shown above are average values and improved values are available. The stated values were determined on specimen as per IEC 60672-2, and cannot be applied to other shapes and dimensions easily.

Further, more detailed information to this in the Breviary

You can find detailed information on properties of technical ceramics in our poster "Materials of Technical Ceramics" and in our brochures.

Simply request!

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