Active Member
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[China]
Address: 8th Building, Futing Industrial Park, Zhu village, Guanlan, Longhua, Shenzhen, China
Contact name:Andy Chen
Jinghui Industry Limited |
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Alumina (Al2O3) is the most commonly used industrial ceramic material due to its high mechanical strength, this high-performance. It results in suitable for use in many future-oriented processes. Additionally, the outstanding chemical resistance, great thermal properties and favorable cost of aluminum oxide (Al2O3 content > 90%), it makes alumina as a perfect material for many industries, from electrical applications and high-temperature applications.
Ceramic alumina tubes are found in a variety of electrical/electronic devices, engineering equipment that works as a structural ceramics, so these alumina ceramic tubes are with special shapes, such as flanged, stepped, slotted, multiple holes, half tube, threaded and so on.
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
1. Available material: Alumina(Al2o3), zirconia ceramic(ZrO2), Silicon carbide ceramic(SiC), steatite ceramic
2. Shaping methods: Hot pressed, Dry pressed, Extrusion, 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 metallized
6. Secondary processing: CNC machining, lapping, grinding, precision cutting and so on
| 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 |
We also produce lots of different types of ceramic tubes, including threaded tube, half tube, one end tubes and so on.
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.
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.
