Fine Machining 99 Al2O3 Thermocouple Ceramic Protection Tube Alumina Tubes

* Alumina Tubes

Our 99% Al2O3 thermocouple ceramic protection tubes are precision-engineered for superior thermal stability and mechanical strength in harsh industrial environments. These high-purity alumina tubes offer exceptional resistance to thermal shock, chemical corrosion, and abrasive wear, making them ideal for temperature measurement in furnaces, kilns, and molten metal applications.

* Key Advantages

✔ Ultra-High Temperature Resistance – Withstands continuous operation up to 1600°C, ensuring long-term stability in extreme conditions.

✔ Superior Thermal Shock Resistance – Rapid heating/cooling cycles do not cause cracking, unlike lower-grade ceramic tubes.

✔ Chemical Inertness – Resists corrosion from acids, alkalis, and molten metals (e.g., steel, aluminum, copper).

✔ Precision Machining – Tight tolerances (±0.1mm) ensure perfect fit for thermocouples and sensors.

✔ Electrical Insulation – High dielectric strength prevents current leakage in electrically noisy environments.

* Performance:

1. The strong acid and alkali resistance of zirconia ceramic shall be better than other materials.

2. Zirconia ceramics are not easy to wear, with strong durability. The hardness is close to the natural diamond and light than metals, also has the gem properties such as never wear and non - discoloring.

3. Can maintain the mechanical strength under high temperature, can be used in the condition with high temperature.

4. Good surface finish quality, could get more glossy smooth surface. Small coefficient of wear, with quite good self - lubricating function, non - magnetic, electric insulation, static - free, anti interference and radiation.

* Technical Parameters

Production process

1. Grind and crush the raw materials to be slurry or powder

2. se-different method to making the slurry or powder into semi-finished products

3. Put the semi-finished products into the kiln for dewaxing and sintering;

4. After forming and sintering, Ceramic Sleeves products can also be processed by subsequent CNC precision machining according to the drawing requirements. Then Q/C test.

5. Finally package Ceramic Sleeves by bubble paper or cartons and place it on tray for delivery

Certifications

Packaging and shipping

FAQ：

Q: Do you have the products in stock? 

A: Some standard produce have in stock, such as ceramic band heater insulator; bobbin heater insulator and ceramic connector. But it needs to check according to your requirement.

Q: How do you pack the goods?

A: Our standard packaging is carton, we can customize it as per your requirement as well.

Q: How many days do you finish the sample?

A: Usually 15 business days (Including 8days for making furnaces and 7days for producing samples)