Specifications
ceramic porous ceramic tube laminated ceramic fiber tube :
1.Great mechanical strength.
2.Good heat resistant.
3.Good quality
ceramic porous ceramic tube laminated ceramic fiber tube
alumina ceramic tube:
1.Great mechanical strength.
2.Good heat resistant.
3.Good quality and best price.
4.Long life time.
1. We produce 95-99.7% alumina crucibles, boats, insulating parts, rods, wear resistance parts, high temperature ceramic parts etc of alumina ceramic tube products.
2. Mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace of alumina ceramic tube.
3. Especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry of alumina ceramic tube.
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
|
3.1×109
|
5×108
|
SHENGSHIKANG science Co.,Ltd.
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