1.99.7% high purity aluminum ceramica tube for furnace
2.both end open
3.extreme high temperature stability
4.crossion resist
99.7% high purity aluminum ceramica tube for furnace
Features:
1 High dielectric properties.
2 Extreme wear and abrasion resistance.
3 Chemical corrosion resistance under high temperature.
4 Extreme high temperature stability under reducing, inert
and high vacuum condition under high temperature up to 1800C.
5 Gas tight for many applications to provide protective atmospheres
or high vacuum at high temperature to eliminate contamination or impurity.
Furnace tube
OD(mm) | 25~30 | 31~40 | 41~50 | 51~60 | 61~70 | 71~80 | 81~90 | 91~100 |
ID(mm) | 19~23 | 24~32 | 33~40 | 41~50 | 51~60 | 61~70 | 71~80 | 81~90 |
L(mm) | 200~1600 | |||||||
Main performance index
Serial number | performance index | Measuring unit | High purity alumina | Alumina | High alumina |
1 | Al2O3 | % | 99.7 | 99.3 | 85 |
2 | SiO2 | % | less than0.1 | — | — |
3 | Density | g/cm3 | 3.95 | 3.88 | 3.2 |
4 | Wter absorption | % | 0 | 0.01 | 0.2 |
5 | Cld compressive strength | MPa | 450 | 350 | 200 |
6 | 20 degree Celsius leak rates | Torr/L.sec | less than10-11 | less than10-11 | less than10-11 |
7 | Twisting in high temperature | mm | 1700 degree Celsius 0.2 allowance | 1600 degree Celsius 0.2 allowance | 1400 degree Celsius 0.2 allowance |
8 | Bonding in high temperature |
| 1700 degree Celsius non-caked | 1600 degree Celsius non-caked | 1400 degree Celsius non-caked |
9 | 20—1000 degree Celsius coefficient of thermal expansion | mm.10-6/degree Celsius.m | 8.6 | 8.2 | 8.2 |
10 | Thermal conductivity | W/m.k | 25 | 25 | 25 |
11 | Electric insulation strength | KV/mm | 20 | 20 | 15 |
12 | 20 degree Celsius direct current insulating resistance | Ohm/cm | 1014 | 1014 | 1014 |
13 | High-temperature insulation resistance | 1000 degree Celsius MΩ | ≥0.08 | ≥0.08 | ≥0.08 |
1300 degree Celsius MΩ | ≥0.02 | ≥0.02 | ≥0.02 | ||
14 | Thermal shock resistance |
| 1550 degree Celsius 6 times not cracked | 1550 degree Celsius 6 times not cracked | 1300 degree Celsius 3 times not cracked |
15 | Maximum service temperature | degree Celsius | 1900 | 1800 | 1400 |
order guidelines
1.Graduations(K,N,E,J,T,S,R,N etc.) and working temperature
2.Material demand
3.Volume
4.specifications(diameter,thickness)
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