Wuhan Global Metal Engineering Co., Ltd
Wuhan Global Metal Engineering Co., Ltd The pioneer manufacturer of heaters & sensors
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High Temperature Resistance Alumina Insulator for Band Heater
1. Brief Introduction
Alumina ceramics is the most widely used fine ceramics material. This material has superb material characteristics such as high electrical insulation, high mechanical strength, high wear and chemical resistance. Due to the important combination of properties, we have thoroughly researched the behaviour and characteristics of our Alumina products to give you the best possible component.
2. Characteristics
Good strength and stiffness
Good hardness and wear resistance
Good corrosion resistance
Good thermal stability
Excellent dielectric properties (from DC to GHz frequencies)
Low dielectric constant
Low loss tangent
3. Parameter.
| COMPOSITION | UNIT | AL-960 | AL-975 | AL-980 | AL-995 |
| AL2O3 | % | 96 | 97.5 | 98 | 99.7 |
| tensile | Kpsi | 30 | 30 | 30 | 32 |
| flexural | Kpsi | 55 | 55 | 55 | 60 |
| compressive | Kpsi | 300 | 300 | 300 | 330 |
| density | g/cc | 3.67 | 3.72 | 3.80 | 3.90 |
| porosity | - | 0 | 0 | 0 | 0 |
| color | - | white | white | white | white |
| hardness | moh’s scale | 9 | 9 | 9 | 9 |
| thermal contduct | w/m*k | 0.049 | 0.05 | 0.052 | 0.055 |
| C.O.T.E | In/In*K(x107) | 75 | 76 | 77 | 78 |
| Max WK TEMP | - | 1600 | 1650 | 1650 | 1700 |
| Dielectric strength | D.C.Volts0.100″Thick | 230 | 230 | 240 | 250 |
| Volume Resistivity | Ohm-cm(x1012) | 2 | 3.1 | 3.2 | 3.5 |
| Dielectric constant | - | 9 | 9.4 | 9.6 | 9.7 |
| Dissipation | - | 0.0003 | 0.0002 | 0.0001 | 0.0001 |
| Loss factor | - | 0.028 | 0.013 | 0.011 | 0.009 |
Applications: