SINTYRON 997 99 al2o3 high purity alumina ceramic vacuum tube
Alumina vacuum ceramic tubes are high-performance ceramic material products, widely used in high vacuum, high temperature, insulating or corrosive environments

Product description:

• Material: 99% Al₂O₃ (or 95% for cost-sensitive uses)

• Porosity: Adjustable (20%–50%)

• Pore Size: 1μm–100μm (customizable)

• Max. Temperature: 1600°C

• Diameter/Length: OEM support

We can do OEM and OBM according to your drawing and requires​:​​​​​​

 

Key Features:

Material: Made from high-purity alumina (typically 95% to 99.8% Al₂O₃), offering:

High thermal stability

Excellent electrical insulation

Superior mechanical strength

Resistance to corrosion and wear

Oval Shape: The oval cross-section provides a larger surface area compared to round tubes, which can

 be beneficial in applications like heat transfer or fluid flow.

Double Bore Design: The two parallel bores allow for the simultaneous passage of different materials, 

gases, or fluids, making it ideal for applications requiring separation or controlled flow.

Dimensions: Customizable in terms of length, bore diameter, wall thickness, and oval dimensions to suit

 specific requirements.
 

Application field:
Vacuum system: As a vacuum chamber, observation window, electrode feedthrough device (such as semiconductor equipment, particle accelerators).

Electronic devices: high-voltage insulating bushings, vacuum capacitors, vacuum switch tube shells.

Energy field: Sodium-sulfur batteries, sealed isolation tubes for thermoelectric conversion devices.

Scientific research equipment: high-temperature furnace tubes, laser tubes, mass spectrometer components.

Industrial field: Corrosive gas conveying pipes, high-temperature sensor protective sleeves.

 

Composition	AL95	AL99
AL2O3 Content	97%	99.80%
Color	White	Ivory
Tensile	30 Kpsi	32 Kpsi
Flexural	55 Kpsi	60 Kpsi
Compressive	300 Kpsi	330 Kpsi
Density	3.7 g/cc	3.92 g/cc
Hardness	13.8 HV, Gpa	18 HV, Gpa
Thermal Conductivity	25 W/(m K)	32 W/(m K)
C.O.T.E.	77 In / In°C (x10^7)	78 In / In°C (x10^7)
Working Temperature	1500 °C	1750 °C
Dielectric Constant	9.5	9.8
Volume Resistivity	>10^14 Ohm-cm	>10^15 Ohm-cm
Dielectric Strength	16 KV/mm	20 KV/mm

Advantages:

• High thermal shock resistance

• Low thermal conductivity

• Chemically inert

• Long service life in harsh environments

Customization:

These tubes can be tailored to meet specific requirements, such as:

• Different alumina purity levels

• Surface finishes (e.g., polished, glazed)

• Precision tolerances for bore size and ovality

If you need more details about specific properties, applications, or suppliers,

feel free to ask!

 

Why Choose Our Porous Alumina Tubes?

Precision Engineered – Consistent pore distribution for reliable performance.

Lab-Tested Durability – Rigorous QC ensures longevity in extreme conditions.

Global Shipping – Fast delivery with OEM/ODM services.

Company Information:

FAQ

Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t

have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.