2018 new 99% silicon nitride heat resistant ceramic tube
Riser Tubes offer long service lifetimes, due to good thermal shock resistance and good corrosion resistance. This extended service life translates to longer intervals between cleaning and less production downtime for tube removal and replacement.
Features and Benefits
• Gas-tight
• Long life >12 months
• Unaffected by corrosion
• No melt contamination
• Can be used in melts containing sodium and strontium
• Resists build-up of dross
• High temperature resistance up to 1,300°C
• High thermal shock resistance
• No preheating required at operation temperatures below 900°C
• Easy cleaning of bake-on • Best price/performance ratio
Performance
Performance | General | Our product |
Purity | >99.8 | >99 |
Density (g/cm3 ) | >1.91-1.95 | 3.18 |
Apparent porosity(%) | <15 | <1 |
Cold crushing strength | >50 | >1200 |
Highest use temperature in air (℃) | 1650 | 1400 |
Highest use temperature in protective atmosphere(℃) | 1650 | 1800 |
Cold bending strength (MPa) | >25 | 750 |
High temperature bending strength(MPa) | >28 | 485(1400℃) |
Standard Sizes
Outside diameter without flange (mm) | Inside Diameter (mm) | Max. Length (mm) |
80 | 60 | 1200 |
90 | 70 | 1200 |
110 | 90 | 1200 |
125 | 105 | 1200 |
130 | 110 | 1200 |
With circumferential flat bottomed or hemispherical groove on request.
Other sizes and groove designs available on request.
We offer full ceramic and steel flange systems in both standard and
custom sizes in order to provide the best adaptation to your furnace
configuration.
Comparative table of thermal properties
Acceptable: + ; Good: ++ ; Very good: +++
These values are for information only and do not constitute a contractual obligation.
Molten aluminum is processed at temperatures between 680°C and 800°C. Radiant heater tubes are used to keep melts on temperature. The tube material should have sufficient mechanical stability to withstand the stresses of operation. In addition, the material must be resistant to chemical attack by the melt, and must not contaminate the melt with loose particles.
Shipping :
1.By sea / By air / By courier (DHL, UPS, TNT, FEDEX, EMS express are available )
2.As customized requirements
The only 99% high purity silicon nitride manufacturer in China ---Hengyang Kaixin established in June,2013, is specialized in designing and manufacturing of silicon nitride ceramic products with 8 years experience and IS9001,SGS,ROHS passed ,the area of our factory is 5000 square meters and 50-100 staff ,In addition to the advanced facilities and equipment,there are 10-20 people in the r&d department
Our main product like riser tube ,thermocouple protective tube,radiant tube,plunger,heating rod,electrode protection cover,which are widely used in military project,aerospace and navigation,smelt,chemical industry,electronics,medicine.
The OEM and R & D are available, We warmly welcome further inquiries from overseas customers.
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