Alumina purity: 99.7% Color: Lvory Sintering temperature: 1810C Max. working temperature: 1700 oC

Our protection tubes offer extreme high temperature stability under reducing, insert and high vacuum condition up to 1700C (99.7%). They also provide extreme wear, abrasion and chemical corrosion resistance under high temperature.

Composition	Unit	95	992	997
AL2O3	%	95	99.2	99.7
Density	g/cc	3.68	3.82	3.85
Flexural	Mpa	304	340	370
Linear Expansion Coefficient	(×10-6/)(25-800)	7.4	7.6	7.7
Hardness	Mohs Scale	9	9	9
Thermal Contduct	cal/cm 2	0.048	0.051	0.054
Max Working Temperture		1480	1650	1700
Color	--	Red	Ivory	Ivory
Volume Resistivity	Ohm-cm (x10 12 )	1.8	3.2	3.4
Porosity	--	0	0	0
Dielectric Constant	--	9	9.5	9.7

Alumina furnace tube