Properties

Item	Feature
Purity (Sio2)	>99.95%
Density @ 20 (±05g/CM2)	2.15
Thermal Expansion (cm/cmoC)	5.4 x 10 -6
Thermal Conductivity	0.0033cal / CM . Sec . oC
Working Temperature (oC)	1100
Fire Resistance (oC)	1650
Annealing Point (oC)	1300
Resistivity @ 20 oC	2 x 1014 Ω - M
Resistivity @ 800 oC	2 x 105 Ω - M
Pressure-resistance (5mm thickness) @ 20 oC	10 KV/MM
Pressure-resistance (5mm thickness) @ 500 oC	2-300 KV/MM
Abrasion Resistance	Any Acid Except HF Acid
Infrared Launch Rate	< 4 U
(Wavelength)	> 4 U
	> 5-13 U

Available to absorb the far infrared spectrum with wavelength under 4 U, it makes the tube body itself heat and increase the heat energy radicalization.
At the meanwhile, the wavelength at 5-13 U area far infrared wave bands transmit rate reach onto 90%. material needing heat to dry (it is generally at 3-25u areas，it has strong absorption) Offer most effective alternative absorption to heat material component. This feature is not available with any other far infrared material.

Standard Sizes & Tolerance (MM)

Size(mm)	OD	WT	Siding Max	Oval Max	Bow
6.0-15	±2.0%	±10%	10%	1.50%	2‰
15 - 20	±1.5%	±10%	15%	1.50%	2‰
20 - 25	±1.5%	±10%	15%	1.50%	2.5‰
25 - 35	±2.0%	±10%	15%	1.50%	2.5‰
35 - 50	±2.0%	±10%	15%	1.50%	2.5‰

Main Applications:

* Far infrared roast
* High temperature thermoelectric couple
* High temperature electric cooker
* High Temperature Industry dryness /
calefaction application
* Such as : Heater, disinfect tank, microwave
oven, Electric Oven etc.