High Purity & Density: With a purity of over 99.999%, it features a dense, pore-free surface, excellent hermeticity, and an extremely low helium permeability of 1×10⁻¹⁰ cm³/s.
High Temperature Resistance & Thermal Properties: It withstands temperatures up to 2200℃, with its strength increasing as temperature rises. It exhibits exceptional thermal shock resistance and anisotropic thermal conductivity (60 W/m·K in the a-direction at 200℃, and only 2.60 W/m·K in the c-direction).
Chemical Inertness: It is resistant to corrosion by acids, alkalis, salts, and organic reagents, and demonstrates non-wetting behavior and no reactivity with most molten metals and semiconductor materials.
| Properties |
Unit |
Value |
| Density |
g/cm³ |
1.95–2.20 |
| Tensile Strength |
N/mm² |
102 |
| Flexural Strength |
N/mm² |
243 |
| Compressive Strength |
N/mm² |
244 |
| Thermal Conductivity (200°C) |
W/(m·K) |
60 (a) / 2.60 (c) |
| Thermal Expansion Coefficient (200°C) |
K⁻¹ |
2.0 × 10⁻⁶ (a) |
| Dielectric Constant (Room Temperature) |
— |
5.81 |
| Electrical Resistivity |
Ω·cm |
2.4 × 10¹⁵ |
Application field solutions
Semiconductor Single Crystal Growth: Used for the growth of III-V compound single crystals such as GaAs (gallium arsenide) and InP (indium phosphide) via VGF (Vertical Gradient Freeze) and LEC (Liquid Encapsulated Czochralski) methods. The high purity and high-temperature deformation resistance of PBN crucibles ensure low defects and high purity of the crystals.
Molecular Beam Epitaxy (MBE): Serves as MBE crucibles for evaporating materials like aluminum (Al) and gallium (Ga) to produce high-end epitaxial wafers such as superlattices and quantum wells. Its high purity and non-wetting property guarantee precise stoichiometry and high quality of the thin-film materials.
OLED Evaporation & Microelectronics: Applied in OLED evaporation source units, featuring high temperature resistance and extremely low outgassing rate, enabling uniform evaporation, extending equipment lifespan, and enhancing display device performance.
High-Temperature Metal Processing & Metallurgy: Used for molten metal transfer and special metallurgy crucibles. Its thermal shock resistance and corrosion resistance make it suitable for processing reactive metals and alloys.
