Beryllium Oxide (BeO) Rods – Precision Engineered for Vacuum Electronics, Heat Sinks, and High-Temperature Crucible Supports
Beryllium Oxide (BeO) ceramic rods combine **extreme thermal conductivity (285 W/m·K)** with **excellent electrical insulation** and **low dielectric loss**. Second only to diamond in thermal performance, BeO rods are the preferred material for **traveling wave tube (TWT) spiral supports**, **RF power transistor packages**, **nuclear control rods**, and **high-temperature crucibles**.
Coraynic Technology offers **99.5% high-purity BeO rods** in a wide range of diameters and lengths, with custom end configurations including **stepped, threaded, flanged, and metallized terminations**. Our rods are CNC ground to precision tolerances and are available with **MoMn/Ni/Au metallization** for brazing and hermetic sealing.
With a **dielectric constant of 6.6 @1MHz** and a **dissipation factor of 0.0004**, BeO rods introduce minimal signal loss at high frequencies, making them indispensable in **military radar, satellite communication, and microwave vacuum devices**.
## Key Features & Benefits
– **Thermal Conductivity:** 285 W/m·K @25°C – 10× Al₂O₃, 1.5× AlN.
– **Low Dielectric Loss:** 6.6 @1MHz, tan δ ≤0.0004 – ideal for high-frequency vacuum electronics.
– **High Melting Point:** 2530°C – operational up to 2000°C continuous.
– **CTE Matched to Metals:** 7.0–8.0 ×10⁻⁶/°C – compatible with kovar, copper, and stainless steel.
– **Mechanical Strength:** Flexural strength ≥200 MPa, compressive strength >350 MPa.
– **Precision Tolerances:** Diameter ±0.5%, length ±0.1 mm, camber <0.1%.
– **Custom End Configurations:** Stepped, tapered, threaded, flanged, notched, metallized bands.
– **Metallization Options:** MoMn + Ni/Au, thin film, DBC ready.
– **Nuclear Grade:** Low neutron capture cross-section, high moderating ability.
## Technical Specifications (99.5% BeO Rod)
| Property | Unit | Value |
|———-|——|——-|
| Purity | % | 99.5 |
| Density | g/cm³ | ≥2.88 |
| Color | – | White |
| Melting Point | °C | 2530 ±10 |
| Thermal Conductivity (25°C) | W/m·K | 285 |
| Thermal Conductivity (100°C) | W/m·K | 220 |
| Dielectric Constant (1MHz) | – | 6.6 ±0.2 |
| Dielectric Constant (10GHz) | – | 6.8 ±0.2 |
| Dissipation Factor (1MHz) | – | ≤4×10⁻⁴ |
| Dissipation Factor (10GHz) | – | ≤4×10⁻⁴ |
| CTE (25–500°C) | ×10⁻⁶/°C | 7.0 – 8.0 |
| Volume Resistivity (25°C) | Ω·cm | >10¹⁴ |
| Dielectric Strength (DC) | kV/mm | ≥40 |
| Flexural Strength | MPa | ≥200 |
| Compressive Strength | MPa | >350 |
| Hardness (Knoop) | – | 1200 |
| Poisson’s Ratio | – | 0.26 |
| Young’s Modulus | GPa | 345 |
| Grain Size | μm | 10 – 20 |
| Air Tightness | Pa·m³/s | ≤5×10⁻¹² |
| Chemical Stability | mg/cm² | ≤0.1 (HCl/NaOH) |
## Standard & Custom Dimensions
### Diameter (mm)
| Standard Stock | Custom Range |
|—————-|————–|
| 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.35, 8.0, 10.0, 12.7, 15.0, 20.0, 25.0 | 0.5 – 50.0 |
### Length (mm)
| Standard Stock | Custom Range |
|—————-|————–|
| 5 – 200 | Up to 500 (consult engineering) |
### Tolerance
| Parameter | Tolerance |
|———-|———–|
| Diameter | ±0.5% |
| Length | ±0.1 mm |
| Camber | <0.1% |
| Concentricity | <0.05 mm |
### Custom End Configurations
– Stepped diameters
– Tapered ends
– Threaded ends (male/female)
– Flanged bases
– Notched / slotted
– Metallized bands (MoMn + Ni/Au)
– Through holes or blind holes
## Applications
### Vacuum Electronics
– Traveling Wave Tube (TWT) spiral support rods
– Magnetron clamping bars
– Buck collectors and collection electrodes
– Microwave windows and attenuator ceramics
### RF & Microwave Packaging
– RF power transistor bases (Si, GaAs, GaN)
– Hermetic feedthrough insulators
– High-power terminations
### Nuclear Engineering
– Neutron reflectors and moderators
– Control rod components
– Nuclear fuel matrix elements
### High-Temperature Processing
– Crucible supports and stands
– Induction furnace liners
– Sintering boat rods
### Heat Sinks & Thermal Management
– High-density circuit heat spreaders
– Laser diode submounts
– High ambient temperature applications (no airflow cooling)
## Why Choose Coraynic Technology?
– **Vertically Integrated Manufacturing:** From BeO powder processing to precision CNC grinding and metallization.
– **Defense & Aerospace Qualified:** Supplier to military radar and missile guidance programs.
– **Engineering Support:** Our team assists with rod geometry optimization, metallization pattern design, and brazing compatibility.
– **Quality Control:** 100% inspection – ICP, laser particle analysis, universal tool microscopy.
– **Compliance:** RoHS, CE, ITAR compliant. Full SDS and material traceability.
> **Contact our engineers:**
> **Email:** sales@coraynic.com
> **Phone:** +86 187 61951906
> **Request a quote:** www.coraynic.com/contactus.html
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**© 2025 Coraynic Technology Limited – Your reliable advanced ceramic material partner.**
*All technical data are based on 99.5% BeO grade at room temperature. Custom specifications welcome. Safety Data Sheet (SDS) available upon request. Beryllium Oxide products are intended for professional industrial use only.*
