High Temperature Collared Alumina Ceramic Tubes
Main characteristics of alumina ceramic tubes
1. Extreme high-temperature stability under reducing, inert, and high-vacuum conditions under high temperature up to 1800°C.
2. Great mechanical properties, hardness, compressive and flexural strength are much higher stainless steel
3. Extreme wear and abrasion resistance., over 276 times in comparison with stainless steel
4. Extraordinary electrical insulation, it always us in many high voltage, high-current application
5. Chemical corrosion resistance under high temperature, even if with strong acid or alkali
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
The specification of the ceramic tubes
| Material options |
Alumina ( purity from 40% to 99.8%), Zirconia, Silicon carbide, Silicon nitride |
| Forming methods |
Extrusion, Dry pressed, Hot pressed, Ceramic Injection molding, ISO pressed |
| Dimensional capability |
The inner diameter can be min.1mm, the outer diameter can max .800mm |
| Dimensional tolerance |
The OD to be 0.005mm, the ID to be 0.01mm, the length to be 0.001mm |
| Surface treatment |
External and internal surface to be polished, glazed, or metalized |
| Secondary processing |
CNC machining, lapping, threaded, drilling, grinding, precision laser cutting |
The Description of alumina ceramic tubes
We provide a selection of different purity materials for alumina ceramic tubes, 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. Our alumina furnace tubes, alumina thermocouple protection tubes, and insulators are available in a variety of diameters and lengths with sufficient stock.
The various complex configuration of ceramic tubes, like round, square, rectangular, hex, flanged, double-bores, tri-bores,muti-bores, one end open, etc are available to us.
Additionally, ceramic alumina tubes can be metalized to bond with metal parts, also they can be polished to mirror surface comes to the specific use.
Technical Datasheet of various advanced ceramic materials
| General |
Properties |
Unit |
99.5% Al2o3 |
99% Al2O3 |
96% Al2O3 |
Steatite |
YTPZ
ZrO2 |
SiC |
| Mechanical |
Volume
Density |
G/cm 3 |
≥3.90 |
≥3.85 |
≥3.65 |
≥2.70 |
≥6.0 |
≥3.13 |
| Hardness |
HRA |
1700 |
1700 |
1500 |
800 |
1300 |
2500 |
| Porosity |
% |
0 |
0 |
0 |
0 |
0 |
0 |
| Compressive Strength |
Mpa |
≥2240 |
≥2240 |
≥2000 |
≥551 |
≥1990 |
≥ 2200 |
Bending
Strength |
Mpa |
≥379 |
≥338 |
≥320 |
≥190 |
≥1200 |
≥400 |
Elastic
Modulus |
Gpa |
370 |
350 |
303 |
110 |
210 |
400 |
| Thermal |
Thermal Conductivity |
W/m.K |
30 |
29 |
24 |
2.5 |
3 |
120~150 |
Coefficient of Thermal
Expansion |
1*10 -6 m/k |
6.5~8.0 |
6.2~8.0 |
5.0~8.0 |
7.7~8.0 |
8.0~9.5 |
4 |
| Electrical |
Insulation Breakdown |
KV/mm |
19 |
18 |
18 |
10 |
17 |
- |
| Volume Resistivity |
Ohm.Cm |
>1*1014 |
>1*1014 |
>1*1014 |
>1*1013 |
>1*1011 |
5*10 6 |
Our advantage and strength
1.Own in-house comprehensive types of manufacturing equipment from raw material to precision machining.
2.With over 12 years of manufacturing experience of OEM, ODM, and professional and teams
3.The rigorous and complete quality control system, including IQC, IPQC, OQC, and QA, also CPK, AQL
4.Support special and custom-made needs, including prototyping and R&D cases, or serial massive demands.
5. Offer many selections of technical ceramic materials, including alumina, zirconia, silicon carbide, silicon nitride
6. Deal with every case in order to enhance the competitiveness of customers and make their business grow.
7. Providing one-stop ceramic components, including Ceramic Tubes, Ceramic Rods, Industrial Ceramic Plate.
FAQs (Frequently Asked Questions)
Q1: Is it available to produce customized products?
A: We support custom-made alumina ceramic tubes as per different dimensions, designs, surface treatment.
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 does the whole procedure being worked out?
A: After you place an order, the manufacturing time is about 25 working days.
Q4.How to ensure quality in your factory?
A: The strict quality-control will be done in the production line, including IQC, IPQC, QA, OQC,
Also both CKP, AQL are regularly used in production.
Q5. Are you a factory or trading company?
A: We are a professional manufacturer. You are welcome to visit our factory and cooperate with us.
Audited Supplier 
){kind=link}
){kind=link}