Specifications

Alumina Furnace Tubes
1.Material: 85 - 99.5% alumina ceramic
2.Purpose:used in various furnace
3.Max Length 2500mm

Alumina Furnace Tubes 

 

Bochuan company specilize in producing various alumina ceramic tubes with different shapes.These tubes can be used as furnace tubes,thermocouple tubes or insulating tubes.We have many stocks in our warehouse.And we can

also accept customised items.

 

Please see the blew information:

 

Material	85 Al2o3	90 Al2o3	95 Al2o3	99 Al2o3
Al2o3	85%	90%	93%	99.30%
Fe2o3	≤ 1.0	≤ 0.5	≤ 0.5	≤ 0.3
Desnsity: g / cm3	3.4	3.5	3.6	3.85
Vickers Hardness	≥ 8.6	≥ 8.8	9	9
Water Absorption:%	≤ 0.2	≤ 0.1	≤ 0.085	≤ 0.01
Refractoriness:°C	1580 °C	1600 °C	1650 °C	1800°C
Flexural Strength:Mpa	180	200	240	280
Wear Rate( at room temperature, erosion, 100 grinding)%	≤ 3	≤ 2.5	≤ 1	≤ 0.5

 

Dimension		Outer dia. mm	Inner dia.mm	Length mm	Remark
Item
Thermocouple protection tube		7-120	1-110	10-2000	If you need others,we can customize for you.
Insulated tube	Single hole	2-120	1-110	10-2000
(inner core)	Double holes	1-10	0.4-2	10-2000
	Four holes	2-10	0.5-2	10-2000

 

Index for 99% corundum ceramic tube:
Twisting strength	3160  kg/cm2
Tensile strength	23300 kg/ cm2
Bending stength	2520 kg/ cm2
Hardness	9
Vol.density	>3.8  g/ cm3
Coefficient of linear expansion	(room temperature-800°C) 7.75*10-6 /°C
Thermal stability	1300°C-room temperature no rupture for three times(above 50)
	1000°C-room temperature no rupture for three times(abov 50)
Puncture voltage	(room temperature)>10KV/mm
Vol.resistance	(room temperature)>>1014 Ω. Cm
Longtime applying temperature	1600°C
Short time applying temperature	1800°C
AL2O3	≥99%
Refractoriness	2030°C