Alumina Ceramic Protection Tube
- YUNXING
- China Jinzhou
- 5-30 Days
- 5,000-10,000/month(Looking for distributors)
The alumina ceramic protection tube has:
A. Good thermal stability, insulation, air tightness and other characteristics.
B. It is widely used in thermocouples, radiation temperature measurement and other fields.
C. Large-diameter protection tubes are widely used in vacuum furnaces, temperature measurement, sensor protection and other industries.
Alumina Ceramic Protection Tube
My factory looking for distributors.
With goos thermostability,insulation,air tightness etc properties,ceramic protection tubs are widely used in thermocouple,radiation temprature measurement etc fields.
We only make high purity alumina ceramics
1. High-purity alumina content 99.3% -99.5%, other alumina ceramics 92% -99%.
2. The color of high purity alumina product is milky white, and other products are pink or white. The higher the purity, the more transparent the color.
3. Alumina is a refractory material, the higher the purity, the better the refractory effect
4. After high-purity alumina ceramics are fired and cooled in a 1800-degree high-temperature kiln, the products are not easy to break when they encounter high temperatures. Other ceramics are fired at 1500 ℃ ~ 1800 ℃.
5. The volume density of high-purity alumina> 3.92 g / cm3 has a smooth surface and is not easily corroded by chemicals. The bulk density of other ceramics is> 3.70 g / cm3 ~> 3.85 g / cm3.
6. High purity alumina has good hardness and good wear resistance.
7. High purity alumina products have a longer service life.
Recommended products
Perforated pipe: Small diameter tube: Square tube:
A wire sleeve used for Used in various industrial Corrosion resistence、
thermocouples. furnaces Field, do furnace tube, High temperature resistance,
High temperature resistance, Support Insulation, threading insulation.
insulation, high temperature and other uses.corrosion
stability Qualitative good, resistence, High temperature
one-point numerous-temperature resistance, insulation.
is aiso realizable in porous.
Ingredients
| Name | Content(%) |
| Al2O3 | 99.3-99.5 |
| SiO2 | 0.1-0.35 |
| CaO+MgO | 0.2-0.3 |
| K2O+Na2O | 0.11-0.15 |
| Fe2O3 | ＜0.05 |
| Others | ＜0.05 |
Alumina ceramic performance index (Notice of Correct in Leakeage Rate）
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | — |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Compressive strength | MPa | 2300 |
6 | 20℃ leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600℃ |
8 | Bonding in high temperature | not bonded in 1600℃ | |
9 | 20—1000℃ coefficient of thermal expansion | mm.10-6／℃.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20℃direct current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000℃ MΩ | ≥0.08 |
1300℃ MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550℃ | |
15 | Maximum working temperature | ℃ | 1800 |
16 | Hardness | Mohs | 9 |
17 | Flexural strength | Mpa | 350 |
Precautions for use
1. Put an end to collisions. Alumina protection tube is made of nonmetallic ceramic material. The collision will break the alumina protection tube.
2. Correct installation. The 1850mm thermocouple is relatively long and cannot be installed horizontally. During installation, it should be fixed properly and the vibration on the industrial site will cause damage.
3. Leave enough space for expansion. Attention should be paid to prevent corundum casing from cracking due to extrusion during thermal expansion.
4. Avoid sharp changes in temperature. When thermocouples are inserted into the furnace at high temperature, the alumina protective tube must have sufficient preheating time. The thermocouple must be pulled out of the furnace slowly, otherwise the alumina protection tube will burst due to the rapid temperature change. Remember not to pull it out and put it directly on the ground.
Our factory
Jinzhou Yunxing Industrial Ceramics Co., Ltd. was established in 2000, mainly producing various types of tubular ceramic products and various industrial parts with alumina content above 99.3%. The factory covers an area of 4000 square meters.
The company currently has 3 1800 ° C high-temperature furnaces and 2 1400 ° C low-temperature kilns independently designed and manufactured. The molding process is mainly based on grouting molding, and has other molding process equipment such as extrusion and hot die casting.
The company has 105 employees, including one senior ceramic engineer, three engineers, six overseas sales staff, and four professional after-sales staff.
FAQ
1. Lead time: pls confirm the quantities required;
2. Incoterm: FOB, CFR, CIF;
3. Delivery Cost: It is determinated by the destination port;
4. Payment Term: PayPal; T/T;
5. Shipment: by sea, by air, by courier, by post, etc.
