Industrial Alumina Ceramic 2 Hole Tube
- yunxing
- china
- It depends on the quantity of order
- 2000-5000/month(Looking for distributors)
Application range of alumina ceramic two-hole tube:
A. Thermocouple connection application.
B. Use metal wire for threading.
C. Application of insulation accessories for small electrical appliances.
Industrial Alumina Ceramic 2 Hole Tube
My factory looking for distributors.
Typical Applications:
1. Temperature Measurement and Control
2. Electrical Insulator
Composition table
NAME | CONTENT(%) |
Al2O3 | 99.3-99.5(99.7) |
SiO2 | 0.3-0.5 |
CaO+MgO | 0.2-0.3 |
K2O+Na2O | 0.2-0.35 |
Fe2O3 | <0.1 |
OTHER | <0.05 |
Alumina ceramic performance index
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | - |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Cold compressive strength | MPa | 350 |
6 | 20ºC leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600ºC |
8 | Bonding in high temperature | not bonded in 1600ºC | |
9 | 20-1000ºC coefficient ofthermalexpansion | mm.10-6/ºC.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20ºCdirect current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000ºC MΩ | ≥0.08 |
1300ºC MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550ºC | |
15 | Maximum working temperature | ºC | 1800 |
Production process
Most of our Tubes are produced to OEM order, please mark clearly height, bottom diameter, top diameter, wall thickness and any special requirements i.e. lips etc. To speed up quotations please supply a drawing and if appropriate, the name of the system in which they are to be used.
RFQ
What is alumina ceramic used for?
Other essential applications of alumina ceramics can be seen in seal rings, medical prostheses, laser tubes, thermocouple tubes, electronic substrates, ballistic armor, electrical insulators, grinding media, and wear components.
Why is alumina expensive?
It is expensive, largely because of the amount of electricity required in the extraction process. Aluminium ore is called bauxite close bauxiteA rock that can be used to make aluminium.. The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted.
How long does alumina last?
Material: Activated alumina, molecular sieve, life is different according to the temperature of the intake air, 2-6 years, according to the filter after the dryer to determine whether a desiccant is needed. If the filter is drained, it needs to be replaced immediately.