China Ceramic Alumina Tube manufacturer

Al2O3 Alsint 99.8% Alumina Ceramic Tube For Furnace

Product Details:
Place of Origin: Hunan, China
Brand Name: Jinghui ceramics
Certification: RoHS, REACH, ISO
Model Number: JH.ACT.001
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: Individually packed with export carton
Delivery Time: 4~5 weeks after receiving the order
Payment Terms: T/T, Western Union,Paypal, Credit card
Supply Ability: 2000000 Piece/Pieces per Month

Detail Information

Product Name: Ceramic Micro Tube Material: Alumina Ceramic
Color: Pure White, Pink, Ivory Shape: Ceramic Cylinder, Ceramic Tube
Size: Size Customized Type: Ceramic Parts
Certificate: ISO9001:2008/SGS/ROHS Application: Industrial Ceramic
High Light:

Al2O3 Alsint Alumina Ceramic Tube


Furnace Alumina Ceramic Tube


99.8% Alumina Ceramic Cylinder

Product Description

Large Diameter Al2O3 Alsint High Alumina Ceramic Tube For Furnace

Specification of the ceramic tube

1. Forming methods: Extrusion, Dry pressed, Hot pressed, Ceramic Injection molding, ISO pressed

2. Material options:  different purity alumina (from 95% to 99.8%), zirconia, Silicon carbide, steatite

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

4. Secondary processing: CNC machining, lapping, grinding, precision cutting and so on

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

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



Main characteristics of high alumina ceramic tube

1. Exceptional corrosion resistance, it can withstand various strong acid and alkali, like HF, H2SO4

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

3. Outstanding wear resistance, over 276 times in comparison with stainless steel

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


The description of high alumina ceramic tube


The high alumina ceramic tube is made of high purity aluminum oxide range from 95% to 99.5%, it features high-temperature resistance, high wear resistance, and high hardness, as well as chemical stability to resistance most of the acids and alkalis.

The large size high alumina ceramic tubes usually used as a kind of standard protection part for furnace, it plays a very important role in protecting the heating element of the furnace.  

Our facility has many selections of stocks with standard sizes for alumina ceramic tubes. Our vast, readily-available inventory allows us to supply our customer’s ceramic tube needs immediately, even for hard-to-find or specialty products. 

Material Data. Sheet











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 tubes

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


Al2O3 Alsint 99.8% Alumina Ceramic Tube For Furnace 0  Al2O3 Alsint 99.8% Alumina Ceramic Tube For Furnace 1  Al2O3 Alsint 99.8% Alumina Ceramic Tube For Furnace 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 orders, 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 after sending the inquiry?

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 in your factory?

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.

Get in touch with us

Enter Your Message

You Might Be Into These