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Ceramic tube

Alumina ceramic insulator Insulation tube High temperature Ceramic tube insulators 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

Hotline

+86181-2297-4730

E-mail

admin@cerampart.com

Alumina ceramic insulator Insulation tube High temperature Ceramic tube insulator beads

 

Alumina ceramic insulator is made of high purity alumina material, which makes it have excellent insulation performance and stable physical and chemical properties.
 
Excellent insulation performance: The insulation resistance of alumina ceramic insulator is extremely high, greater than 10^14Ω·cm, which can effectively isolate current and avoid problems such as circuit short circuit and leakage.
 
High temperature stability: Alumina ceramic insulator can maintain good insulation performance and mechanical strength in high temperature environment, and its operating temperature can usually reach above 1500℃, meeting the requirements of high temperature equipment.
 
Wear resistance and corrosion resistance: The hardness of alumina ceramic insulator is as high as level 9, second only to diamond, which can effectively resist various physical and chemical corrosion and has excellent wear resistance.
 
High strength and high toughness: Alumina ceramic insulators have good mechanical properties, with a tensile strength of more than 200MPa, excellent fracture toughness, and can withstand large mechanical loads and impact loads.

Application characteristics
 
Isolation and support: Alumina ceramic insulators are mainly used to isolate and support wires, leads and other components in power systems to ensure the normal operation of power equipment.
Fixing function: Alumina ceramic insulators can also be used to fix components inside power equipment to maintain the stability of the equipment.
High voltage resistance: In high-voltage transmission lines, alumina ceramic insulators can effectively withstand high voltages in power systems and ensure the safe operation of lines.
 
Alumina ceramic insulators are widely used in power, electronics, metallurgy and other fields due to their excellent performance. Especially in substations, transmission lines, signal cables and other occasions, alumina ceramic insulators play an irreplaceable role.


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

Notes:
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. thanks

Our official E-mails: admin@cerampart.com  (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 Customers

OEM 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)...

 
Al 2O 3		 ZrO2/Y2O3 ZrO2/MgO MgO SiC Si3N4 Reaction sintered Si3N4 Hot pressed ALN
Physical properties                
Density (g/cm3) 3,9 5,9 5,75 3,58 3,2 3,27 3,29 3,26
Molecular weight (g/mole) 102 - - 40,4 40,1 140 140 41
Maximum service temperature air (°C) 1700- 1800 1500 1000 2200 1500 1200- 1500 1100- 1600 1000- 1800
Mechanical properties                
Hardness (Mohs) 9 - - 5,5 9 - - 7
Modulus of elasticity (GPa) 300-400 200 200 250-300 420 170-220 280-310 318
Poisson's ratio 0,25 - - 0,18 0,14 0,25-0,26 0,27 0,25
Fracture toughness (MPa.m1/2) 2-3 7-13 6-10 - 2,5-3,5 3,5-5 6,1 4,5
Electrical properties                
Dielectric constant 9-10 - - 9-10 - 10 10 9,2
Electrical resistivity at 20°C (Ohm.cm) >10 14 10 13-10 14 >10 10 - 10 2-10 6 >10 7 10 12- 10 15 >10 14
Dielectric strength (kV/mm) 10-20 9 2-10 - - - - 15
Thermal properties                
Specific heat (J/K/kg) 900 400-500 420 870-880 750 690 680-800 800
Thermal conductivity (W/m/K) at 20°C 26-35 2,2-3,2 1,5-2,5 40-50 63-155 9-30 15-43 180
Coefficient of thermal expansion ( 10-6) from 20 to 1000°C 8-9 10-11 5-16 10-13 4-5 3 3,3 4,4-5,3
Melting point (°C) 2050 2590 - 2800 2500 1900 1900 2200

 

Precision of manufacture
Dimensional accuracy Up to 0.001mm
Smoothness Highest possible mirror
Concentricity Up to 0.003mm
Parallelism Up to 0.002mm
The inner hole tolerance The minimum  0.005mm
Straight flute The narrowest 0.1x100mm
The thickness of the size Minimum to 0.02mm
The screw thread Minimum internal thread M2
Cylindricity Up to 0.004mm
The linear tolerance Up to 0.001mm
The smallest aperture The minimum 0.07mm
Precision process CNC maching,grinding,lapping
Surface finish Glazed,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

FAQ
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.
 
Feedback
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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Dongguan Mingrui Ceramic Technology Co., Ltd.
TEL：+8618122974730
MB：+86 181 2297 4730 Tel：+86 746 3386888
Skype：+86 181 2297 4730
Email：admin@cerampart.com
ADD：No. 21, Chuangxing Road, Shangsha Second Industrial Zone, Chang'an Town, Dongguan City