Custom Alumina Ceramic Tube For Thermocouple Protection And High Temperature Applications

99.5%, 99% And 95% Alumina Ceramic Tubes Customized For Thermocouple Protection Industrial Furnaces And Electrical Insulation

High Purity Alumina

Precision Machining

Export Worldwide

99.5%, 99% And 95% Alumina Ceramic Tubes Customized For Thermocouple Protection Industrial Furnaces And Electrical Insulation

Our Alumina Ceramic Tube Solutions

High purity alumina tube with excellent insulation, mechanicalstrength and thermal stability.

One end closed design for thermocouple protection in harsh high temperature environments.

99.5% high alumina tube with higher purity, better corrosion resistance and longer service life.

Two-hole, three-hole andmulti-porous structures forwiring, gas flow or insulationapplications.

Item	Unit	99.7% Al₂O₃	99% Al₂O₃	95% Al₂O₃
Purity	%	99.7	99	95
Density	g/cm³	3.9	3.89	3.6
Porosity	%	0	0	0
Firing Temperature	℃	1800	1700	1680
Hardness	HV	1700	1600	1500
Flexural Strength	Kgf/cm²	3500	3500	3000
Compressive Strength	Kgf/cm²	30000	30000	25000
Fracture Toughness	MPa·m½	4	3.8	3-4
Max Operating Temperature	℃	1700	1600	1450
Thermal Expansion	cm/cm/℃	8×10⁻⁶	8×10⁻⁶	8×10⁻⁶
Thermal Conductivity	W/m·K	27	25	22
Volume Resistivity	20℃	10¹²	10¹²	10¹²
	100℃	10¹³	10¹³	10¹³
	300℃	10¹²-10¹³	10¹²-10¹³	10¹²-10¹³
	(ohm·cm)	10¹²	10¹²	10¹⁰
Dielectric Strength	Volts/mil	220	216	210