| Application: | Aerospace, Electronics, Medical, Refractory, Industrial Ceramic |
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| Material: | Al2O3 |
| Dielectric Loss: | 0.0003 |
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Aluminum Oxide (Al2O3) or Alumina 96% is the most widely used ceramic material for ceramic printed circuit boards and submounts. This is because alumina PCBs have good material properties, including good thermal conductivity, low CTE (coefficient of thermal expansion), dielectric strength, strong resistance to chemical hazards, and hermeticity. These favorable properties are in combination with a relatively low cost and more easy handling which explains the wide usage. Furthermore, UV transparency, as well as the bright white color, can also be a benefit in applications where a high reflection rate of visible light is needed without discoloration issues (yellowing)
Applications include, for example, cooling and heating modules, LED boards, sensor modules, antennas, and high-frequency devices.
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Alumina Ceramics Properties
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Unit
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95%
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99%
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Density
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g/cm3
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3.6
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3.8
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Water absorption
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%
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<0.4
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<0.2
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Firing temperature
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°C
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1600
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1800
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Hardness
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HRA
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70
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80
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Coefficientoflinearexpansion
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*10-6/°C
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5.5
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5.3
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Dielectric constant
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9
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10.5
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Volume resistivity
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Ω·cm
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-
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1013
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Breakdownvoltage
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KV/mm
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14
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15
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Breaking strength
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Mpa
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250
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300
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