Beryllium oxide ceramic rods are made from high-purity BeO ceramic and are used in precision structures that require both fast heat transfer and reliable electrical insulation. They are commonly used in power electronics, RF and microwave devices, laser equipment, thermal management assemblies, and high-temperature insulating structures where ordinary insulating ceramics may not provide enough thermal conductivity and metal parts cannot provide electrical isolation.
Material: High-Purity Beryllium Oxide Ceramic (BeO)
BeO ceramic has a special material profile: it is electrically insulating, but it can also transfer heat very efficiently. In electronic and high-frequency equipment, this allows the component to help move heat away while maintaining electrical isolation between parts. For compact structures, heat-sensitive assemblies, or designs that require stable signal performance, beryllium oxide ceramic is a valuable material choice.
More BeO ceramic products are available in our Beryllium Oxide Ceramic category.
| Parameter | Technical Indicator | Functional Significance |
|---|---|---|
| Material Purity | ≥ 99.5% BeO | Helps ensure thermal conductivity and material stability |
| Thermal Conductivity | 260–300 W/(m·K) | Helps transfer heat quickly along the ceramic rod |
| Dielectric Strength | ≥ 15 kV/mm | Suitable for high-voltage structures that require electrical isolation |
| Dielectric Constant | 6.5–6.8 (1 MHz) | Helps reduce signal interference in RF or microwave structures |
| Volume Resistivity | > 1014 Ω·cm | Maintains insulation performance in high-temperature or high-heat areas |
| Thermal Expansion | 7.5–9.0 × 10-6 /K | Supports structural matching with Kovar, copper alloys, and other materials |
| Flexural Strength | 200–250 MPa | Helps reduce breakage risk during assembly and vibration |
| Dimensional Accuracy | Up to ±0.01 mm after centerless grinding | Suitable for precision assembly in laser, RF, and microwave components |
Note: The above values are typical reference data. Actual specifications should be confirmed according to material grade, product size, drawing tolerance, machining method, and inspection requirements.
| Material | Main Characteristics | Suitable Applications |
|---|---|---|
| Beryllium Oxide Ceramic | Very high thermal conductivity, good electrical insulation, and low dielectric loss | Power electronics, RF devices, microwave components, laser equipment, and thermal management structures |
| Alumina Ceramic | Good insulation, high hardness, and cost-effective performance | General insulating parts, wear-resistant parts, and structural ceramic components |
| Aluminum Nitride Ceramic | High thermal conductivity and good electrical insulation for electronic heat dissipation | Electronic substrates, power modules, and semiconductor heat-dissipating parts |
| Silicon Carbide Ceramic | Excellent wear resistance, corrosion resistance, and thermal stability, usually for harsher mechanical conditions | High-temperature, corrosive, abrasive, and mechanically loaded environments |
For more electronic and insulating ceramic parts, please visit our Electronic Ceramic Components category.
They are mainly used in structures that require both heat transfer and electrical insulation, such as power electronics, RF and microwave devices, laser equipment, thermal management assemblies, and high-temperature insulating parts.
Alumina ceramic provides good insulation, but its thermal conductivity is limited. BeO ceramic offers much higher thermal conductivity while still maintaining electrical insulation, making it more suitable for applications with higher temperature control requirements.
No. BeO ceramic is an electrical insulating material, but it can conduct heat efficiently. This makes it suitable for positions where heat must be dissipated without electrical conduction.
Yes. We can customize diameter, length, end faces, chamfers, holes, grooves, surface condition, and dimensional tolerances according to drawings or samples.
The typical thermal conductivity is about 260–300 W/(m·K). The actual value may vary depending on material purity, forming and sintering process, part structure, and testing conditions.
Yes. For rods that require controlled outside diameter, roundness, or assembly accuracy, centerless grinding and other precision machining methods can be used.
Yes. BeO ceramic has low dielectric loss and good insulation performance, making it suitable for selected RF, microwave, and high-frequency electronic structures.
Finished sintered BeO ceramic parts are stable under normal use. However, grinding, cutting, crushing, or any process that may generate dust requires professional protection and strict safety control.
Common inspection items include diameter, length, straightness, outside diameter accuracy, surface quality, end face condition, and any special dimensions shown on the drawing.
Please provide drawings or samples, material purity requirements, dimensions, tolerances, surface condition, quantity, application environment, operating temperature, and inspection standards. This helps us evaluate the machining process and quotation more accurately.
