Description
high purity alumina tube 99% service temperature 1800C alumina tube for tube furnace
Product Description
High purity ceramic alumina tube parameters:
1.Material : High purity alumina oxide 95%-99%.
2.Application: Used for all kinds of electric heating equipment and electric equipment, and textile machinery.
3.Good smooth and high strength.
4. Diameter from 1mm to 120mm,Length from 100mm to 2000mm.
multi bores tubes can be made.
5. Max working temperature 1800.
6. Out surface can be grinded drilling hole to make tight tolerance and right instillation.
7.Large quantity in stock makes fast delivery and competitive prices.
8.OEM and ODM are welcomed.
Alumina (Al2O3) has a wide application due to its versatility and low material cost. Alumina possesses a high melting point, strong hardness, and good chemical stability, making it a good material to withstand high temperature and chemical corrosion. Our alumina furnace tubes, alumina thermocouple protection tubes and insulators, and alumina rods are available in a variety of diameters and lengths. Call for any custom production request.
Main performance index about alumina ceramic tube:
Project
Test the condition
Unit
99 porcelain
95 porcelain
Talc porcelain
Backbone
99%AL2O3
95%AL2O3
MgO.SiO2
Physical property
Density of volume
Normal atmospheric temperature
g/cm3
3.8
3.6
2.8
Airtight
Normal atmospheric temperature
.
.Pass
Pass
-
Absorbing water rate
Normal atmospheric temperature
%
0
0
0
Temperature that frit
°C
1800
1650
1350
Mechanical performance
Rockwell hardness
Normal atmospheric temperature
HRA
88
86
76
Resist the intensity of turning back
Normal atmospheric temperature
Mpa
350
320
150
Compression strength
Normal atmospheric temperature
Mpa
1300
1200
900
Hot performance
Use temperature at most
°C
1700
1600
1200
Heat resistant shaking
20O°C-1100O°C
10Num
Pass
Pass
Pass
Hot coefficient of expansion
20O°C-80O°C
×10-6mm/°C
6.5-8.5
6.5-8.0
5.0-6.2
Heat-conduction rate
25°C
W/m.k
29
25
2.9
300°C
W/m.k
18
13
2
Dielectric constant
The medium lossing
1MHz2O°C
×10-4
≤2.5
≤4
≤8.0
The angle tangent is worth
1MHz8O°C
×10-4
≤3.5
≤4.2
-
Dielectric strength
Normal atmospheric temperature
KV/mm
15
16
20
Dielectric constant
1MHz2O°C
9-10.5
9-10
≤7.5
Resistivity of volume
2O°C
Ω.cm
>1012
>1012
>1013
10O°C
Ω.cm
1012-1013
1012-1013
1010-1011
30O°C
Ω.cm
>1012
Complaint
