Beryllium Oxide (BeO) Ceramics
Featured Product from Shenzhen Great Precision Ceramic CO., LTD.
Beryllium Oxide (BeO) Ceramics — High Thermal Conductivity Insulator Overview
Beryllium oxide (BeO) is a high-performance ceramic material that uniquely combines metal-like thermal conductivity with excellent electrical insulation. It remains stable at elevated temperatures and is widely used in advanced electronics, lasers, RF systems, and nuclear applications where both heat dissipation and electrical isolation are required.
Key Properties
| Property | Description |
|---|---|
| Exceptional Thermal Conductivity | High-purity BeO can reach ~330 W/(m·K), far higher than conventional insulating ceramics like alumina (Al?O?). |
| Excellent Electrical Insulation | Volume resistivity >10¹? ?·cm even at high temperatures, ensuring signal integrity. |
| High-Temperature Stability | Withstands up to 1800 °C in inert/vacuum atmospheres and ~1650 °C in oxidizing conditions. |
| Mechanical Strength & Rigidity | Good flexural strength and high Young’s modulus for resistance against thermal-mechanical stress. |
| Outstanding Dielectric Performance | Dielectric constant ~6.7 with very low loss tangent, ideal for RF and microwave applications. |
| Nuclear Applications | Low neutron absorption and high scattering cross-section, suitable as moderator or reflector in reactors. |
Grades & Typical Specifications
Great Ceramic supplies multiple BeO grades tailored to performance needs:
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B-97 Grade: ~97% BeO, ~200 W/(m·K) thermal conductivity
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B-99 Grade (Standard): ≥ 99% purity, ~260 W/(m·K)
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B-99.5 Grade (Ultra-High Purity): ≥ 99.5% purity, ~285 W/(m·K)
Typical electrical properties (25 °C):
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Dielectric constant (1 MHz): 6.6–6.9
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Dielectric loss (tan δ): ≤ 4×10??
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Volume resistivity: ≥ 1×10¹? ?·cm
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Flexural strength: ≥ 170–200 MPa
Compared with other technical ceramics (alumina, aluminum nitride, Shapal), BeO offers unmatched thermal conductivity advantages.
Applications
BeO ceramics are widely applied in industries requiring both heat management and insulation, including:
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High-power electronic packaging substrates
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RF and microwave insulator components
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Laser system heat management parts
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Nuclear energy structural and thermal components
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High-temperature furnace crucibles and fixtures
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RF/microwave attenuators and absorbers
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Precision-machined custom ceramic components
Processing & Safety
Manufacturing Capabilities
Great Ceramic provides CNC milling, precision grinding, polishing, laser cutting, metallization (Mo/Mn, W), and ceramic-to-metal brazing. Custom parts can be fabricated with micro-level tolerances and complex geometries.
Safety Notice
BeO dust is toxic and long-term inhalation can cause chronic beryllium disease (CBD). It is classified as a carcinogen. All handling must be done under strict dust control, proper ventilation, and with personal protective equipment. Finished sintered parts are stable and safe in normal use.
