Arc extinguishing ceramic(Arc resistant ceramic)

  • Alumina for metal theraml process

Arc Protection

 

Our Arc-resistant ceramic is made of Zircon. A high-tension air circuit breaker and electromagnetic switch. Arc resistance ceramic is an excellent arc extinguishing material and it is able to protect other parts from arc heating.

Feature

  • Especially, suitable for the direct current arc
  • Fire resistance
  • thermal shock resistance
  • Mechanical strength
  • Good electric insulation, withstand voltage
  • Easy to absorb the arc heat.
  • Dimensional accuracy

 

 

Properties

properties units N-300 N-330 Experiment method
Water absorption % 0.2 6.0 JIS C2210
Porosity % 0.0 12.0  
apparent specific gravity   3.2 2.7 JIS C2210
Bending strength ordinary state ㎏/㎝2 1000 250 JIS C2210
After being heated by 500℃ ㎏/㎝2 1000 250 JIS C2210
Impact bending strength ㎏-cm/㎝2 3.5 1.5 JIS C2210
Thermal expansion coefficient ×10-6 3.2 3.0 20~400℃
Break down voltage KV/㎜ 14.0 1.5 JIS C2210
Volume resistivity Ω‐㎝ >1014 >1013 JEC148
Fire resistance   Excellent Excellent Oxy-acetylene
Arc-resistance second >420 >420 ASTM495
Strong point   Fine grain
Strength		 Arc-resistance  
Usefulness   Pleurum Arc Barrier, etc  

*The measured values in the table are not guaranteed values but reference values.