Product Details

Specifications

corundum tube has three series:
1. Protector pipe series
2. Insulation pipe series
3. Through pipe series

corundum tube has three series:
1. Protector pipe series
2. Insulation pipe series
3. Through pipe series

Material: Corundum

Chemical competent	Al2O3	≥99.5%
	SiO2	<0.2%
	Fe2O3	<0.1%
Alkaline matter		<0.1%
Density		3.9 g/cm3
Hardness		9 M
Water absorption		<0.1%
Rupture strength		>2000kg/cm2
Gas tightness		Kept for ten minutes at negative pressure of 1.3Kpa. The pressure drop is less than 0.3Kpa.
Thermal tolerance		Insert the pipe into the furnace at a depth of 20mm. Heat to 1600C and maintain for 30 minutes.
Alkali tolerance		In the Na2CO3 solution of 2N concentration, boil for 15 hours with the weight loss not greater than 20mg/dm2.
Volume resistance		>9*10(5) Ω·cm/1600C
Breakdown voltage		20kv/cm
Expansion coefficient		8*10(-8)
Temperature for use		Long-term: 1600C Short-term: 1800C
Chill and abrupt heat		1500C~room temperature not cracking thrice.

Sally.Gu

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