Refractory Advanced 95 Alumina Ceramic Micro Tube With High
Precision
Specification of the ceramic tube
1. Material options: different purity alumina (from 95% to 99.8%),
zirconia, Silicon carbide, steatite
2. Forming methods: Extrusion, Dry pressed, Hot pressed, Ceramic
Injection molding, ISO pressed
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. Surface treatment: External and internal surface to be polished,
glazed or metalized
6. Secondary processing: CNC machining, lapping, grinding,
precision cutting and so on
Main characteristics of alumina ceramic tube
1. Extraordinary electrical insulation, it always us in many high
voltage, high-current application
2. Outstanding wear resistance, over 276 times in comparison with
stainless steel
3. Exceptional corrosion resistance, it can withstand various
strong acid and alkali, like HF, H2SO4
4. Great mechanical properties, hardness, compressive and flexural
strength are much higher stainless steel
The description of the micro-ceramic tube
We supply a board range of alumina ceramic tubes, including
small-sized part to large-sized part, different levels of purity
from 40% to 99.9%, also a selection of color, customized geometries
are available.
Alumina ceramic tubes generally used as a kind of standard
protection part, Micro-ceramic tubes are regularly shaped or formed
by extrusion or ceramic injection molding, then with necessary
precise grinding to achieve the tighten dimensional size.
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
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
temperature
(Non-loading) | ℃ | 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℃ ) | ohm.cm | ＞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.
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.
