Corundum protector pipe for thermocouple

corundum ceramic pipe has 1.Great strength, 2.good thermal conductivity, 3.great resistance 4. high softening temperatue

Use:Corundum  Protector tube and temperature tube of thermocouple thermometer, carbon determinator, sulfur deteminator and combustion pipe of metallurgy, iron and steel, chemical analysis.

Feature: Great mechanical strength, good thermal conductivity, great resistance to heat impact, high softening temperature, good insulation and high-frequency characteristics under high temperature and resistance to chemical corrosion.

Chemicalcompetent	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.

Corundum protector pipe for thermocouple