- Contact Person : Mr. Qin James
- Company Name : Zhengzhou Shibo Nonferrous Metal Products Co., Ltd.
- Tel : 86-371-67823373
- Fax : 86-371-67822830
- Address : Henan,Zhengzhou,No.2 Hangzhou Road, Xushui Industry&Trade zone, Zhengzhou, Henan, China
- Country/Region : China
- Zip : 450042
High purity refractory Alumina tube
99.5% pure alumina ceramic tube
Character:
1.Smooth surface, excellent Wear-resistantce 2.Long service life. 3. high purity: >=99.5%
4.High Temperature Resistance: 1800C
5. Length:20-3000mm
Be used in thermocouple protection and various furnace, we also can design both open for two ends, and one open, the other closed.
Chemical competent | Al2O3 | ≥99.5% |
SiO2 | <0.2% | |
Fe2O3 | <0.1% | |
Alkaline matter | <0.1% | |
Density | 3.9 g/cm3 | |
Hardness | 9 M | |
Water absorption | <0.1% | |
Ruptures trength | >2000kg/cm2 | |
Gas tightness | Kept for ten minutes at negative pressure of 1.3Kpa. The pressure drop is less than 0.3Kpa. | |
Thermal tolerance | Insert the pipe into the furnace at a depth of 20mm. Heat to 1600ºC and maintain for 30 minutes. | |
Alkali tolerance | In the Na2CO3 solution of 2N concentration, boil for 15 hours with the weight loss not greater than 20mg/dm2. | |
Volume resistance | >9*10(5) Ω·cm/1600ºC | |
Breakdown voltage | 20kv/cm | |
Expansion coefficient | 8*10(-8) | |
Temperature for use | Long-term: 1600ºC Short-term: 1800ºC | |
Chill and abrupt heat | 1500ºC~room temperature not cracking thrice. | |
High purity refractory Alumina tube