corundum tube

Ceramic tube properties:

High Mechanical Strength

High Thermal Conductivity

High Spalling Resistance

High Softening Temperature

Excellent Insulativity

Etching Resistance

Ceramic pipe Application

Ceramic tube shaft for aquatic animals equipment filter pump

Ceramic plunger for high pressure cleaner.

Wearlessness,resistant acid-base and high intensity ceramic assembly apply to petroleum ,chemical and chemical industry.

Wearlesness, corrosion resistance, thermostable parts apply to precision machine.

Specification	Unit	High purity corundum	Corundum	High alumina
Al2O3	%	99.7	95	85
Density	g/cm3	3.95	3.88	3.2
Water absorption	%	0	0.01	0.2
Cold crushing strength	Mpa	450	350	200
20℃leakage rate	Torr/L.sec	<10-11	<10-11	<10-11
Bend under temperature	mm	1800℃allow 0.2	1500℃allow 0.2	1450℃allow 0.2
Adhesive under temperature		1700℃don’t adhesive	1600℃don’t adhesive	1400℃don’t adhesive
20-1000℃thermal expansion rate	mm.10-6/℃.m	8.6	8.2	8.2
Thermal conductivity	w/m.k	25	25	25
Dielectric strength	Kv/mm	20	20	15
20℃direct currentInsulation resistance	Ohm/cm	1014	1014	1014
High temperate insulation resistance	1000℃MΩ	≥0.08	≥0.08	≥0.08
High temperate insulation resistance	1300℃MΩ	≥0.02	≥0.02	≥0.02
Thermal shock resistance		1550℃,6times	1550℃,6times	1300℃,3times
Max service temperature	℃	1900	1800	1400

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