Overview of Low Thermal Expansion Boron Nitride Ceramic Parts

Low Thermal Expansion Boron Nitride Ceramic Parts ceramics are a class of advanced technical ceramics, often referred to as “white graphite.” They are renowned for their unique combination of properties, including high thermal conductivity, excellent electrical insulation, and outstanding thermal shock resistance. Available in various forms such as hot-pressed solids, coatings, and composites, BN ceramics are critical in demanding applications across aerospace, electronics, and metallurgical industries.

Features of Low Thermal Expansion Boron Nitride Ceramic Parts

• High Thermal Conductivity: Offers excellent heat dissipation, similar to metals, while maintaining electrical insulation.

• Excellent Thermal Shock Resistance: Withstands extreme and rapid temperature changes without cracking.

• Superior Electrical Insulation: Maintains high resistivity even at elevated temperatures.

• Low Dielectric Constant and Loss: Ideal for high-frequency and microwave applications.

• Good Chemical Inertness: Resists attack from most molten metals, slags, and salts.

• Non-wetting and Non-reactive: With many molten metals like aluminum and copper.

• High Temperature Stability: Can be used in inert or vacuum atmospheres up to 3000°C.

• Machinability: Can be precision-machined into complex shapes using conventional tools, unlike many other advanced ceramics.

Specifications of Low Thermal Expansion Boron Nitride Ceramic Parts

Low thermal expansion boron nitride ceramic parts offer exceptional stability under heat. They resist changing size significantly when temperatures rise or fall. This property is crucial for demanding applications. Boron nitride ceramics are specially engineered for this performance. They maintain precise dimensions across a wide temperature range. This dimensional stability prevents cracking or warping.

These ceramic parts handle extreme heat very well. They operate reliably in environments exceeding 1000 degrees Celsius. Sudden temperature changes, known as thermal shock, pose little threat. Boron nitride parts resist cracking or breaking under these conditions. This makes them suitable for processes involving rapid heating or cooling cycles.

Chemical resistance is another key strength. Boron nitride ceramics withstand attack from many molten metals. They are inert to salts and strong acids. They also resist alkalis and corrosive gases. This durability ensures long service life in harsh chemical environments. Parts remain functional where other materials degrade quickly.

Electrically, boron nitride is an excellent insulator. It prevents electrical current flow even at high temperatures. This electrical insulation is vital for many electronic and high-temperature processes. It prevents unwanted electrical conduction or short circuits. The material also provides good thermal conductivity in certain orientations. Heat moves away efficiently from critical areas.

These combined properties make low expansion boron nitride parts essential. They perform reliably in semiconductor manufacturing equipment. Furnace components like setters and crucibles benefit greatly. High-temperature fixtures and jigs use them for stability. Plasma etching chambers often incorporate boron nitride parts. Laser applications needing thermal management rely on them. Metal casting and glass processing utilize their resistance.

Applications of Low Thermal Expansion Boron Nitride Ceramic Parts

Low thermal expansion boron nitride ceramic parts solve big problems in tough jobs needing heat stability. Many industries use them because they barely change size when temperatures swing wildly. This is critical for precision work.

Semiconductor manufacturing relies heavily on these parts. Wafer processing involves extreme heat cycles. Boron nitride components like heaters, susceptors, and insulators hold their shape perfectly. This protects delicate silicon wafers from warping or cracking. Consistent part dimensions mean reliable chip production.

Aerospace and defense applications demand these ceramics too. Jet engines and rocket nozzles face intense heat. Boron nitride parts withstand the thermal shock. Their stable size ensures tight tolerances remain under stress. This prevents failures in critical systems. Sensor housings made from this material give accurate readings even in hot zones.

High-power laser systems benefit greatly. Laser cutting and welding generate intense localized heat. Boron nitride nozzles, windows, and beam guides don’t distort. This keeps the laser beam precisely focused. The result is cleaner cuts and better welds.

Glass and metal processing use these ceramics for molds and liners. Molten glass or metal pours into molds. Boron nitride liners resist sticking and thermal stress cracking. The molds last longer. Finished products have better surface quality. Furnace fixtures made from this material endure repeated heating without degrading.

Vacuum furnace applications need stable components. Heating elements and insulation must perform consistently over time. Boron nitride parts deliver this reliability. Their low outgassing keeps the vacuum environment clean. This is essential for sensitive processes like sintering advanced materials.

These ceramics offer excellent electrical insulation alongside thermal stability. This combination is vital in high-temperature electronics. They isolate components safely. Their machinability allows for complex custom shapes. Engineers design parts exactly for their specific equipment needs.

Company Profile

Tanki New Materials Co.Ltd. focus on the research and development, production and sales of ceramic products, serving the electronics, ceramics, chemical and other industries. Since its establishment in 2015, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.

Our products includes but not limited to Aerogel, Aluminum Nitride, Aluminum Oxide, Boron Carbide, Boron Nitride, Ceramic Crucible, Ceramic Fiber, Quartz Product, Refractory Material, Silicon Carbide, Silicon Nitride, ect. please feel free to contact us.

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5 FAQs of Low Thermal Expansion Boron Nitride Ceramic Parts

What makes boron nitride ceramic parts special?
They hardly expand or shrink with temperature changes. This near-zero thermal expansion is rare. Most materials grow or contract noticeably when heated or cooled. Boron nitride stays almost the same size. This is vital for precision parts.

How hot or cold can they handle?
These parts work in extreme heat, easily over 800°C in air. They also handle very cold temperatures well. Their strength actually increases as they get hotter. Many metals weaken at high temperatures. Boron nitride stays strong.

Where are these parts used most?
They are essential where exact size matters under heat. Semiconductor manufacturing tools need them. High-precision optics use them. Furnace parts benefit. Laser equipment relies on them. Any application needing stable dimensions with temperature uses them.

Can you machine them easily?
Yes, they machine well compared to other ceramics. They are softer than alumina or silicon carbide. This makes cutting and shaping simpler. They produce a smooth surface finish. Care is still needed to avoid chipping. They are still ceramics.

How do they compare to other ceramics?
Their thermal expansion is much lower than alumina or silicon nitride. This is their main advantage. They conduct heat well too. Electrically, they are insulators. They resist chemical attack better than many metals. They offer a unique mix of properties.