Click image to view original picture
1)95%,96%,99% Al2O3 Ceramic Tube.
2)High temperature .
3)High strength
4)Good chemical resistant
5)High voltage
Mainly Usage:
1. Heat treatment furnace and toughened furnace
2. Inner liner tube and heating tube in electric furnace
Features:
1.Great mechanical strength
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion
Application:
Electric appliance industry
Automotive industry
Mechanical industry
Engineer industry
|
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. |
|
|
Material |
65 Al2o3 |
75 Al2o3 |
80 Al2o3 |
85 Al2o3 |
90 Al2o3 |
95 Al2o3 |
99 Al2o3 |
|
Al2o3 |
65% |
75% |
80% |
85% |
90% |
93% |
99.3% |
|
Fe2o3 |
≤ 4 |
≤ 2 |
≤ 1.5 |
≤ 1.0 |
≤ 0.5 |
≤ 0.5 |
≤ 0.3 |
|
Desnsity: g / cm3 |
2.8 |
3.10 |
3.20 |
3.40 |
3.50 |
3.60 |
3.85 |
|
Vickers Hardness |
7.5 |
≤ 7.8 |
≥ 8 |
≥ 8.6 |
≥ 8.8 |
9 |
9 |
|
Water Absorption:% |
≤ 4 |
≤ 1 |
≤ 0.5 |
≤ 0.2 |
≤ 0.1 |
≤ 0.085 |
≤ 0.01 |
|
Refractoriness:°C |
1300 °C |
1400 °C |
1450 °C |
1580 °C |
1600 °C |
1650 °C |
1800°C |
|
Flexural Strength:Mpa |
80 |
100 |
150 |
180 |
200 |
240 |
280 |
|
Wear Rate( at room temperature, erosion, 100 grinding)% |
≤ 5 |
≤ 4.5 |
≤ 3.5 |
≤ 3 |
≤ 2.5 |
≤ 1 |
≤ 0.5 |
