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Ceramic tube insulator beads

Materials:Alumina (Al2O3)/ Zirconia(ZrO2) /Si3N4 /SiC ...etc

Sizes:Mini-OD: 0.02mm;Max-length: 500mm

Delivery times:2 -25 days(depends on the quantity)

Precision:Ra 0.1um tolerance: 0.001mm... etc

Features:Heat resistance / Wear resistance / High purity / Refractory / High Corrosion / Good Insulation...

Customized:Can be custom for special sizes and shapes

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Ceramic plates sheet substrate disc series

Ceramic tube insulator bead high temperature resisting insulating alumina zirconia insulators

The ceramic tube insulators are available in stock. The tube insulators are constructed of zirconia ceramics , alumina ceramic and other advance ceramics that has superior gas and vacuum tightness and excellent insulating properties even at elevated temperatures.

Ceramic dome head interlocking insulating beads for flexible electrical insulation on wires

Steatite material has excellent electrical resistance at high temperatures, good mechanical strength and a very low dielectric loss factor.

Bead size outside diameter 5.0mm, inside diameter 2.0mm, overall height 6.0mm, height to shoulder 4.8


Wire-to-ceramic coaxial clearance does affect overall flexibility; therefore, as wire size increases, flexibility decreases.

The electrical and thermal ratings specified are of safe operating limits determined by various factors including material properties, mechanical design, and the intended operating environment. All electrical ratings are based on operation with one side in dry atmosphere and the other side in vacuum of less than 1 x 10-4 Torr. All VacuCAD files as well as any dimensions shown or listed in our ordering tables do not include manufacturing tolerances and are provided for reference only.

Unless otherwise noted they can also be supplied in longer lengths . We can also custom cut shorter lengths to your specifications. Contact us with your specific requirements.

Other sizes available on request

We produce and sale ceramic inslating bead with multi sizes for industry applications. and also offer custom service for our customers. for more details like diameter, instocks, price, delivery time, price etc, please contact us soon, our ceramic engineer feedback within i hours. thanksOur official E-mails: [email protected]  (Mr admin)

Ceramic tube insulators have a best performance for industry. which made of the advance ceramic raws:

95%-99.99% alumina ceramic(Al2O3); zirconia ceramics; silicon carbide ceramics; silicon nitride ceramics..etc

The properties of ceramics

1. Refractory, High Temperature Resistance, Maximum Used Temperature: 1800 ºC (3272ºF)...

2. Hardness Strength, Wear Resistance Up To Mohz 9.0 ; HRA 80-90...

3. High Voltage, Good Insulation Performance ,Electrical Resistivity Up To 10∧14 Ohm.Cm...

4. High Polished Surface Up To Rz0.8(Ra0.1) ...

5. Superior Mechanical Strength, MAX 10 MPa.m1/2 Fracture toughness,

6. Pressure Resistance, Max 2300MPa compressive strength...

7. Anti-High Corrosion Resistance, Such As Acid  Alkali Resistance...

8. Long Service Life...

9. Other excellent property

The hole of ceramic tubes:

Single bore, double bore, four bore, dee tubing, oval shapes, custom shapes...



Our CustomersOEM ceramic spare components and enjoys on-going relationships with businesses of all sizes in dozens of industries, in addition to the markets showcased at the top of this page, including:

§ Cable & Fiber Optics

§ Electric & Gas Welding Equipment

§ Electrical Apparatus & Wiring

§ Investment Casting

§ Infrared Equipment

§ Microwave Equipment

§ Refractory Furnaces

§ Thermocouples

§ Semiconductors

§ Soldering Equipment

§ Spare components for equipment parts

The some types of the ceramic tube insulators like below:


Ceramic materials

· 95%--99.99% Alumina (Al2O3)  

· Silicon Carbide  

· Silicon Nitride 

· TTZ: Magnesia partially stabilized Zirconia (ZrO2)

· YTZP: Yttria partially stabilized Zirconia (ZrO2)

· ZDY: Yttria fully stabilized Zirconia (ZrO2)...

Al2O3ZrO2/Y2O3ZrO2/MgOMgOSiCSi3N4 Reaction sinteredSi3N4 Hot pressedALN
Physical properties

Density (g/cm³)3,95,95,753,583,23,273,293,26
Molecular weight (g/mole)102--40,440,114014041
Maximum service temperature air (°C)1700- 180015001000220015001200- 15001100- 16001000- 1800
Mechanical properties

Hardness (Mohs)9--5,59--7
Modulus of elasticity (GPa)300-400200200250-300420170-220280-310318
Poisson's ratio0,25--0,180,140,25-0,260,270,25
Fracture toughness (MPa.m1/2)2-37-136-10-2,5-3,53,5-56,14,5
Electrical properties

Dielectric constant9-10--9-10-10109,2
Electrical resistivity at 20°C (>10141013-1014>1010-102-106>1071012- 1015>1014
Dielectric strength (kV/mm)10-2092-10----15
Thermal properties

Specific heat (J/K/kg)900400-500420870-880750690680-800800
Thermal conductivity (W/m/K) at 20°C26-352,2-3,21,5-2,540-5063-1559-3015-43180
Coefficient of thermal expansion ( 10-6) from 20 to 1000°C8-910-115-1610-134-533,34,4-5,3
Melting point (°C)20502590-28002500190019002200
Precision of manufacture
Dimensional accuracyUp to 0.001mm
SmoothnessHighest possible mirror
ConcentricityUp to 0.003mm
ParallelismUp to 0.002mm
The inner hole toleranceThe minimum  0.005mm
Straight fluteThe narrowest 0.1x100mm
The thickness of the sizeMinimum to 0.02mm
The screw threadMinimum internal thread M2
CylindricityUp to 0.004mm
The linear toleranceUp to 0.001mm
The smallest apertureThe minimum 0.07mm
Precision processCNC maching,grinding,lapping
Surface finishGlazed,polishing or metallized
Visual quality: 1. No cracks,  no dark dots, no contamination and sharp edges; 2. Evenly distributed glaze with very smooth surface

Customization & Machining Service

As a professional manufacturer of industrial ceramic components.We can custom the sepcial specifications of ceramic tubes, rod or other ceramic parts.High quality,Factory price, on-time delivery, High composition of ceramics


1. Monthly Capacity: 50,000-60,000 pcs;

2. Material: OEM or as per your suggestion;

3. Lead time: about 7-10 days, pls confirm the quantities required;

4. Incoterm: FOB, CFR, CIF;

5. Delivery Cost: It is determinated by the destination port;

6. Payment Term: PayPal; T/T; L/C.

7. Shipment: by sea, by air, by courier, by post, etc.


1. For any query or doubt, please contact us firstly, we will update with you soon;

2. For any other satisfaction, please also feedback to us, which could improve our service better and better.

For more information about ceramics parts,please contact our engineers in time>>>

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