① High temperature resistance.
② Good thermal stability,lower coefficient of thermal expansion.
③ High Corrosion Resistant,acid and alkali, anti-corrosion ability.
④ Excellent electrical insulation,good electrical insulation properties.
Excellent thermal shock stability ,Small thermal expansion coefficient,it is only 5.5×10-7/℃ Control in less than 20 PPM, 15 PPM, 10 PPM, 5 PPM ,2 PPM.