corundum ceramic tube and protection tube
Negotiable /Piece
Min.Order:50 Pieces
Material: Corundum
Use: For thermocouple, interval and insulation between couple wires. For specifications, there are single hole, double holes, four holes and multi-holes. For form, there are round and oval pipes.
Features: Great mechanical strength, good resistance to thermal impact, good insulation and high-frequency characteristics under high temperature. Breakdowm voltage and volume resistance and self-reactance are great and thermal expansion coefficient is small.
Item | Unit | High corundum | Corundum | High Purity Alumina | |
Chemical Composition | Al2O3 | % | 99.7 | 99.3 | 85 |
SiO2 | % | 0.1 |
|
| |
Density | g/cm3 | 3.95 | 3.88 | 3.2 | |
Water absorption | % | 0 | 0.01 | 0.2 | |
Compressive Strength | Mpa | 450 | 350 | 200 | |
20Gas tightness | Torr/L.sec | 10-11 | 10-11 | 10-11 | |
High-temp.bending | mm | 1700 0.2 | 1600 0.2 | 1400 0.2 | |
High-temp. bonding |
| 1700 not | 1600 not | 1400 not | |
20-1000 Expansion coefficient | mm.10-6/.m | 8.6 | 8.2 | 8.2 | |
Thermal conductivity | W/m.k | 25 | 25 | 25 | |
Breakdown voltage | KV/mm | 20 | 20 | 15 | |
High-temp. resistance | 1000 MΩ | ≥0.08 | ≥0.08 | ≥0.08 | |
1300 MΩ | ≥0.02 | ≥0.02 | ≥0.02 | ||
20 DC resistance | Ohm/cm | 1014 | 1014 | 1014 | |
Chill and abrupt heat |
| 1550not cracking six times | 1550not cracking six times | 1300 not cracking thrice | |
Max. Service Temp. |
| 1900 | 1800 | 1400 |
Packing: Standard export wooden case
Shipping: By vessel or plane from any Chinese port
Provide sample for test before order
Provide competitive price
Arrange prodcution on time
Control product quality and delivery time
Provide finished products and packing photos
Book the earliest and fast vessel
Provide original document and original certificate
After sale serivce
DKJL refractories exporting company is one of the most professional suppliers of refractories in China.The main products are refractory bricks,thermal insulation material,heating elements, industrial ceramics and scientific instruments.They are available in various size and shapes.Our products enjoy a good reputation for their excellent quality and service in domestic and international markets.
MOQ: 50pcs
Inquiry factors: Working temp, Density, Size, Quantity
Contact person: Ms. Nicole
Skype: nicole_xijuan Tel: 86-10-13401090766
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