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CORDARITE

GROUP

C. 500

SUB GROUP

-

 - 520 530

FEATURE OF COMPOSITION

-

Mullet 

Cordarite

Cordarite & Alumina

APPLICATION RANGE

Thermal characteristics suited for electrical welding process.

Good resistance to thermal shock, good refractoriness suited for heating elements.

Good resistance to thermal shocks especially suited for thermal and thermo electrical applications.

Good mechanical strength, high refractoriness, excellent resistance to thermal shocks, especially suited for thermal and thermo electrical applications.

                                                      PROPERTIES

COLOUR

 Tan Tan Tan Tan
POROSITY (Vol. %) 30 37 20 30
BULK DENSITY (g/cm2) 1.90 1.90 1.90 2.10
HARDNESS (Mohs Scale) 6 to 6.5 6 to 6.5 6 to 6.5 6 to 6.5

  FLEXURAL
  STRENGTH
(N/mm2)

   Unglazed 25 30 30 35
  Glazed - - - -
MODULUS OF ELECTRICITY (103N/mm2) - - - -

THERMAL
EXPANSION
LINER
COEFFICENT
(10-6 K-1)

 a20 - 1000c 7.10 6.70 3.40 2.65
a20 - 3000c 10.60 6.00 2.65 1.60
a20 - 6000c 9.70 6.60 3.10 2.50
a20 - 8000c 9.20 6.75 3.20 2.80
THERMAL SHOCK RESISTANCEMIN. (K) 100 350 300 350
SPECIFIC HEAT CAPACITY (20-100C) 750 to 900 750 to 900 750 to 900 750 to 900
THERMAL CONDUCTIVITY (20-100C) - - 2.0 2.0
DIELECTRIC STRENGTH METHOD - 
method A (KV / mm)		 - - - -
RELATIVE PERMITTIVITY (48 to 62Hz)  - - - -
DISSIPATION 
   FACTOR AT 
   20C (103)		  48 - 62 Hz - - - -
1 KHz - - - -
 1MHz - - - -
   VOLUME
   RESISTIVITY
   IN TERMS OF
   TEMPERATUR
   E (D.C.)cm		 200C - - - 1010
2000C - - 109 106
6000C - - 105 -
 

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