Alumina Ceramic Parts for E-Gun Evaporation Systems
St.Cera manufactures high-purity 99.8% alumina ceramic components specifically designed for electron beam (E-gun) evaporation systems. These parts include crucible liners, beam deflector shields, insulators, and mounting fixtures. The material offers high dielectric strength (15×10⁶ V/m), thermal stability up to 1600°C, and excellent resistance to thermal shock and chemical attack from evaporated materials. Our precision machining capabilities achieve complex geometries with minimum feature size 0.2mm, flatness 0.003mm, and surface finish Ra0.1. Each part is 100% CMM inspected for dimensional accuracy.
Specifications (based on 99.8% Al₂O₃ & St.Cera manufacturing capabilities):
| Property | Value |
| Material | 99.8% Alumina (Ivory) |
| Density | 3.93 g/cm³ |
| Flexural Strength | 361 MPa |
| Vickers Hardness | 16 GPa |
| Dielectric Strength | 15×10⁶ V/m |
| Specific Resistance | >10¹⁴ Ω·mm²/m |
| Max Length/Width | 1500mm |
| Max Outer Diameter | 600mm |
| Min Feature Size | 0.2mm |
| Flatness | 0.003mm |
| Surface Finish | Ra0.1 |
| Max Operating Temp | 1600°C |
Applications:
- · E-gun crucible liners and evaporation boats
- · Beam deflector shields and aperture plates
- · Electrical insulators and feedthroughs
- · Mounting fixtures for evaporation sources
Manufacturing Precision:
Straightness: 0.005mm, perpendicularity: 0.005mm, roundness: 0.002mm, concentricity: 0.01mm.
Advantages:
- · No contamination of thin films from crucible materials
- · Withstands high thermal gradients during evaporation
- · Long service life – 5× longer than graphite alternatives
Customization:
Custom crucible cavity shapes, mounting flanges, hole patterns, and surface finishes available.
