Alumina Ceramic Protection Tube
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Advantages of Alumina Ceramic Protection Tube
1. Improved temperature accuracy: Alumina ceramic protection tube are able to provide a more accurate temperature measurement, since they reduce the effects of external environmental factors on the readings.
2. Increase durability: The insulation layer reduces the impact of heat, cold, vibration, and other environmental factors, making the alumina ceramic protection tube more durable and less prone to damage.
3. Reduced energy costs: By helping to maintain the temperature of the pipes, alumina ceramic protection tube can reduce energy costs associated with heating or cooling systems.
5. Reduced corrosion: The insulation helps to reduce the corrosion of the pipes, as alumina ceramic protection tube prevents contact between the pipes and other materials.
Application of Alumina Ceramic Protection Tube
1. Furnace work tubes.
2. Kiln furniture, components & accessories.
3. Thermocouple protection tubes.
4.Heater Support Elements.
5. High Temperature Electrical Insulators.
6. Extreme temperature measurement components.
7.Ceramic Laser components.
8. High voltage electrical insulators.
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.
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.
Protection tube(closed one end) (slip casting) Specification Table
Alumina ceramic tube dimensions
| 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 |
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's main products are: alumina ceramic tubes, alumina ceramic crucibles, alumina ceramic rods, alumina ceramic boats, alumina ceramic plates, alumina ceramic parts, etc.
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
Q1. Lead time: pls confirm the quantities required;
Q2. Incoterm: FOB, CFR, CIF;
Q3. Delivery Cost: It is determinated by the destination port;
Q4. Payment Term: PayPal; T/T;
Q5. Shipment: by sea, by air, by courier, by post, etc.
Q6.Is alumina ceramic safe to use?
A6. Alumina ceramic, composed mainly of aluminum oxide (Al2O3), is widely regarded as safe for various applications due to its biocompatibility, thermal resistance, and electrical insulation properties.
Q7.Is alumina metal or ceramic?
A7. Alumina is the most well-known fine ceramic material for chemical and physical stability. Thermal properties: High heat resistance and high thermal conductivity. Mechanical properties: High strength and high hardness.
Certification
Feedback
1. If you have any questions or questions, please contact us and we will communicate with you as soon as possible.
2. For any other satisfaction, please also feedback to us to make our service better and better.
