Hot-pressed hexagonal boron nitride (h-BN) crucibles, rods, plates, and precision CNC components combining extreme thermal shock resistance, molten-metal non-wetting, and electrical insulation.
Often called 'white graphite,' hot-pressed hexagonal boron nitride (h-BN) shares graphite's layered crystal lubricity, effortless CNC machinability, and extreme thermal shock immunity—while remaining a superb high-voltage electrical insulator with high thermal conductivity (~30–60 W/m·K). Crucially, h-BN is non-wetting to molten aluminum, copper, silicon, gold, silver, halides, and III-V semiconductors (GaAs, InP), releasing solidified melts cleanly without cracking.
We supply pure binderless grades (≥99.5% BN for ultra-clean vacuum/MBE environments up to 2,000 °C in N2/Ar), standard B2O3/CaO-bonded machinable stock, and wear-enhanced BN-ZrO2/SiC composites—each accompanied by lot chemical and density COA.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Max Working Temperature | 850–950 °C (Air) / 1,800–2,100 °C (Inert Ar/N2) / 1,650 °C (Vacuum) |
| Bulk Density | 1.90–2.15 g/cm³ |
| Thermal Conductivity | 28–55 W/m·K (anisotropic with pressing direction) |
| Dielectric Strength | 30–40 kV/mm |
| Thermal Expansion (CTE) | 1.0–3.5 × 10⁻⁶ /K (exceptional thermal shock resistance) |
Reference values reflect typical sintered, fused, or wrought grades. Exact batch test figures are confirmed on your written quotation and accompanying lot Certificate of Analysis.
Specify operating atmosphere (air vs. vacuum vs. Ar/N2—critical for grade selection!), max temperature, contact melt chemistry, binderless vs. standard grade, and rod/plate/crucible dimensions or CNC drawing.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare Hexagonal Boron Nitride (h-BN) Ceramics RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
TB-CER-INSCustom-machined electrical, RF, vacuum, and thermal ceramic bushings, flanged washers, standoffs, and heater bobbins built to your engineering drawing.
TB-ZRO2-CRTransformation-toughened 3Y-TZP structural zirconia parts and ultra-refractory YSZ/Mg-PSZ crucibles, setter plates, and tubes rated up to 2,100 °C.
TB-MGC-STKZero-porosity fluorphlogopite mica glass-ceramic rods, plates, and finished CNC parts that machine with standard metalworking tools with zero post-firing shrinkage.
TB-PVD-LNPrecision-tapered e-beam gun hearth liners in OFHC copper, purified & impermeable graphite, vitreous carbon, molybdenum, tungsten, alumina, and h-BN.
Submit your purity grade, geometry, quantity, and documentation requirements. Every order includes the producing mill's batch Certificate of Analysis (COA) and pre-shipment dimensional verification.