High Temperature Proof Aluminum Oxide Ceramic Plate Excellent Performance Insulation
Alumina Ceramic plate
1.Product description
The main material of ceramic plate is Aluminium Oxide( Al2O3). The purity varies from 92%-99.7%, density from 3.0-3.96g/cm3, and working temperature from 1000-1800°C. It offers a combination of superior mechanical strength and electrical properties, wear resistance and corrosion resistance.
Specifications:
Diameter & Length:5-850mm
Height:5-850mm
All alumina ceramic plates could be customized according to your data requirements and drawings.
alumina ceramic plate Features and advantage
1.Great mechanical strength
2.Low thermal conductivity
3.High heat resistance
4.High softening temperature
5.Small thermal expansion coefficient
6.Good cold-resistance heat-resistance
7.Resistance to acid and alkali corrosion
8.Long service life
alumina ceramic plate Chief technical parameters
2.Main Properties
| 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% |
| Rupture strength | >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 1600℃ 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/1600℃ |
| Breakdown voltage | 20kv/cm |
| Expansion coefficient | 8*10(-8) |
| Temperature for use | Long-term: 1600℃ Short-term: 1800℃ |
| Chill and abrupt heat | 1500℃~room temperature not cracking thrice. |
| AL2O3% Composition | Density (g/cm3) | Flexural Strength (MPa) | Thermal Conductivity
[w/(m.R)] | Dielectric Strength
(KV/mm) | Working Temp. |
| 60 | 3.0 | 205 | 16 | 10 | 1000°C |
| 75 | 3.1 | 280 | 17 | 10 | 1250°C |
| 80 | 3.3 | 215.7 | 17 | 10 | 1290°C |
| 85 | 3.4 | 230 | 17 | 10 | 1350°C |
| 92 | 3.6 | 312 | 18 | 10 | 1390°C |
| 95 | 3.7 | 304 | 20 | 10 | 1480°C |
| 99 | 3.81 | 340 | 34 | 10 | 1600°C |
| 99.7 | 3.85 | 370 | 35 | 10 | 1700°C |
3.Application
MGC: Machinable glass ceramic have the following applications:
a) Electrical or thermal insulator
b) Structural components
c) Semi-conductor processing
d) Electrical and opto-electronic equipment
e) Many other uses.
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