China Ceramic Alumina Tube manufacturer

Threaded Ceramic Thermal Insulation Tube , Thermocouple Protection Tubes

Product Details:
Place of Origin: Hunan, China
Brand Name: Jinghui ceramics
Certification: RoHS, REACH, ISO
Model Number: JH.CT.008
Payment & Shipping Terms:
Minimum Order Quantity: 10 Piece/Pieces
Price: Negotiable
Packaging Details: Vacuum packing with desiccant
Delivery Time: 4~5 weeks
Payment Terms: T/T, Western Union, MoneyGram, Paypal, , L/C
Supply Ability: 20000 Piece/Pieces per Month

Detail Information

Product Name: Threaded Alumina Ceramic Tube Material: 96% 99% 99.5% Alumina
Color: Pure White, Pink, Black,Ivory Optional Shape: Ceramic Tube, Ceramic Cylinder
Size: Size Customized Type: Ceramic Parts
Certificate: ISO9001:2008/SGS/ROHS Application: Industrial Ceramic
High Light:

alumina ceramic insulator


ceramic insulator tube

Product Description

Good Polished External Well Resistance Threaded Alumina Ceramic Tube

Specification of the ceramic tube

1. Forming methods: Dry pressing, Hot pressing, Ceramic Injection Molding, ISO pressed and so on

2. Material choice: Alumina(Al2o3), Zirconia( Al2O3), Silicon carbide (SiO2), Silicon nitride(Si3N4)

3. Dimension capability: Min. the inner diameter can be 1mm, Max. the outer diameter can be 800mm

4. Tolerance: outer diameter can be 0.005mm, the inner diameter can be 0.01mm, the overall length can be 0.01mm

5. Precision processing: CNC machining, lapping, grinding, precision cutting and so on

6. Surface treatment: External and internal surface to be polished, glazed or metallized


Benefits of our alumina ceramic tube

1. Chemical corrosion resistance under high temperature, even if with strong acid or alkali

2. Extreme wear and abrasion resistance., over 276 times in comparison with stainless steel

3. Great mechanical properties, hardness, compressive and flexural strength are much higher stainless steel

4. Extreme high-temperature stability under reducing, inert, and high-vacuum conditions under high temperature up to 1800°C.

5. Extraordinary electrical insulation, it always us in many high voltage, high-current application

6. Protective atmospheres or high vacuum at high-temperature to eliminate contamination or impurity.

7. Low material cost in high-level applications than other technical ceramics



Description of the alumina ceramic tube

We provide numerous different types of alumina ceramic tubes in order to meet physical special needs, typical types including shaped tubes, slotted tubes, threaded tubes, square tubes and so on. They can made from a selection of different purity material, including 96%, 99%, 99.5%, and 99.8%. All these ceramic tubes can be shaped by hot pressing, dry pressing, ceramic injection mold or extrusion.
All alumina tubes offer high-temperature resistance, strong hardness, wear resistance, electrical insulation, and good chemical stability, making it a good material to withstand high temperature and chemical corrosion. 
Additionally, ceramic alumina tubes can be metalized to bond with metal parts, also it can be polished to mirror surface comes to the specific use.


Material Data. Sheet

General Property Units 99.5% alumina 99% alumina 95% alumina
Mechanical Density g/cm3 ≥3.85 ≥3.80 ≥3.60
Water absorption % 0 0 0
Hardness HV 1700 1700 1500
Flexural strength Mpa ≥379 ≥338 ≥320
Compressive strength Mpa ≥2240 ≥2240 ≥2000
Fracture toughness Mpa m 1/2 4-5 4-5 3-4
Thermal Max. service
1650 1600 1450
CTE (20-800℃) 1×10 -6 /℃ 6.5~8.0 6.2~8.0 5.0~8.0
Thermal shock T(℃) ≥250 ≥200 ≥220
Thermal conductivity (25℃ ) W/m.k 30 29 24
Specific heat 1 x 10 3 J/(kg·K) 0.78 0.78 0.78
Electrical Volume resistivity (25℃ ) >1 x 10 14 >1 x 10 14 >1 x 10 14
Insulation strength KV/mm 19 18 18
Dielectric constant (1Mhz) (E) 9.7 9.5 9.5



Picture gallery of ceramic tube

We also produce lots of different types of ceramic tubes, including threaded tube, half tube, one end tubes and so on. 

Threaded  Ceramic Thermal Insulation Tube , Thermocouple Protection Tubes 0  Threaded  Ceramic Thermal Insulation Tube , Thermocouple Protection Tubes 1  Threaded  Ceramic Thermal Insulation Tube , Thermocouple Protection Tubes 2



Packaging proposal & Transportation methods


1. Vacuum packing with desiccant as an inner package;

2. Then, exported carton as an outer package.

3. Finally, it will be packed with a wooden case if needed.

4. We regularly use DHL, UPS, FedEx, and TNT to ship small parcels.

5. For large volume order, we could ship it by sea as per customers' needs.



FAQs (Frequently Asked Questions)

Q1: Is it available to produce customized products?

A: We always support custom-made metallic coated ceramic insulators as per different dimensions, designs, metallization, and platings.


Q2. When can I get the price?

A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price, please call us or tell us in your email so that we will proceed with your inquiry as a priority. 


Q3. How long can I expect to get the sample?

A: After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 4 weeks. The samples will be sent to you via express and arrive in 3-5 workdays. You can use your own express account or prepay us if you do not have an account.

Q4. How long does the whole procedure being worked out?

A: After you place an order, the manufacturing time is about 25 working days. 


Q5. How to ensure quality?

A: The dimension out of any batch will be carried out sampling inspection per International AQL standard. A 100% cosmetic inspection will be done. 


Q6. Are you a factory or trading company?
A: We are a professional manufacturer. We are warmly welcome clients from worldwide to visit our factory and cooperate with us.

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