Product Name: High-Purity Hexagonal Boron Nitride (BN) Ceramic Rod
Product Material: Hot-Pressed Boron Nitride (HPNB), Boron Nitride Composites (e.g., BN-Alumina, BN-Zirconia for enhanced hardness)
Material Characteristics: Excellent thermal shock resistance (survives 1000°C to 25°C rapid cycles), High thermal conductivity, Superior electrical insulation at ultra-high temperatures, Low coefficient of friction (self-lubricating), Non-wetting to most molten metals and glass, Chemically inert, Easily machinable with standard HSS tools
Application Fields: High-temperature vacuum furnace insulators, Molten metal sampling and stirring rods, Plasma arc shields, Ion implantation hardware, Glass forming plunger rods, Thermocouple protection cores, PVD/CVD deposition masks, Aerospace heat shield supports
Application Industries: Biomedical (Laboratory ceramic tools), Advanced Machinery (Non-ferrous metal casting), New Energy (Crystal growth equipment), Fluid Control (High-temperature gas nozzles), Electronic Engineering (RF/Microwave heat sinks), Aerospace (Plasma thruster components), Petrochemical (High-temp sensors), Broad Semiconductor (MBE and wafer processing)
Processing Difficulties: Managing the inherent anisotropy of hot-pressed BN to ensure consistent thermal performance across the rod length, Protecting the finished rods from hygroscopic effects (moisture absorption) in certain grades, Achieving micron-level precision on a naturally soft ceramic without surface tearing, Controlling dust extraction during high-speed dry machining
Processing Flow: BN powder synthesis → Vacuum hot-press sintering → Billet quality inspection → CNC precision turning/drilling → High-temperature vacuum bake-out → Dimensional and straightness verification → Moisture-proof vacuum sealing → Packaging
Delivery Period: Standard rod dimensions: 10-20 days, Customized complex machined rods: 25-40 days
The Boron Nitride Ceramic Rod is a high-performance material designed for applications where traditional ceramics fail due to thermal shock or complex geometry requirements. Often utilized in molten metal handling and high-vacuum processes, these rods provide a unique combination of thermal conductivity and dielectric strength. Unlike alumina or zirconia, BN rods can be machined with extreme precision using conventional metalworking tools, allowing for rapid prototyping and complex structural designs. Their non-wetting property against molten aluminum, zinc, and magnesium ensures that they remain clean and functional in the most aggressive foundry environments.
Key Features
Exceptional Machinability: Can be turned, milled, and drilled into intricate shapes with standard metalworking equipment.
Extreme Thermal Shock Resistance: Can be plunged directly into molten metals without preheating or risk of cracking.
Inert to Molten Metals: Provides zero adhesion for aluminum, magnesium, and zinc, significantly reducing maintenance downtime.
Stable Dielectric Performance: Maintains superior insulation properties in inert atmospheres at temperatures up to 2000°C.
Self-Lubricating: Operates smoothly in friction-heavy environments without the need for oils or external lubricants.
