Overview of Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic

Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic 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 Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic

• 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 Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic

Hot-pressed hexagonal boron nitride ceramic, often called white graphite, is a special material. It handles extreme heat very well. It also resists chemical attack strongly. This makes it perfect for tough jobs in furnaces, metal casting, and chemical plants. Here’s what you need to know about its key specs.

The material gets its strength from hot pressing pure h-BN powder. This process creates a dense, fine-grained structure. Density typically ranges from 1.90 to 2.00 g/cm³. This high density helps it resist wear and chemical erosion. Mechanical strength is moderate. Flexural strength usually falls between 30 and 60 MPa. Compressive strength is higher, often around 100 to 150 MPa. It won’t crack easily under sudden temperature changes. This thermal shock resistance is a major advantage.

Heat tolerance is outstanding. Hot-pressed h-BN ceramics can work continuously in air up to 900°C. In inert gases or vacuum, they withstand temperatures over 2000°C. They don’t melt or decompose easily. Thermal conductivity is high along the pressing plane, similar to stainless steel. It’s lower perpendicular to it. This directional property helps manage heat flow in components. The coefficient of thermal expansion is very low. This minimizes size changes during heating or cooling.

Purity is critical. High-grade material contains over 99% boron nitride. Impurities like boron oxide or boric acid are kept very low. This ensures maximum performance and corrosion resistance. Electrically, it’s an excellent insulator. Volume resistivity is extremely high, even at elevated temperatures. Dielectric strength is also very good. This makes it safe for electrical applications near heat.

The material feels smooth and lubricious, like graphite. But it doesn’t need lubricants. It works well in dry or vacuum conditions. It doesn’t wet with molten metals like aluminum or glass. This non-wetting property prevents sticking. Chemical inertness is broad. It resists most acids, alkalis, and molten salts. This combination of properties is hard to find elsewhere.

Applications of Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic

Hot-pressed hexagonal boron nitride ceramics are special. People call them “white graphite”. They look like graphite. They feel slippery like graphite too. But they are very different. They don’t conduct electricity. Heat moves through them very well. They stay stable even in extreme heat. Oxygen doesn’t affect them much. Chemicals don’t eat away at them easily. These features make them useful in tough places.

In metal factories, they form parts for casting. Molten metal flows over them smoothly. The metal doesn’t stick. This makes clean shapes. They line crucibles for melting reactive metals like aluminum. The metal stays pure. They are parts in high-temperature furnaces. They handle the heat without breaking down.

The electronics world needs them too. They make good insulators for high-power devices. Heat escapes quickly. This keeps transistors and diodes cool. They are substrates for circuits needing electrical isolation and heat spreading. They are parts in semiconductor manufacturing equipment. They handle hot, corrosive gases safely.

High-temperature equipment relies on them. They are excellent seals and bearings. They work where other materials fail. They lubricate moving parts inside hot ovens and furnaces. Regular oils would burn away. They form nozzles for spraying hot materials. They resist wear and chemical attack.

The aerospace and defense sectors use them. They go into rocket engine parts. They face intense heat and plasma. They serve in thermal management systems for advanced vehicles. They insulate sensors in harsh conditions.

Even cosmetics use a powder form. It gives a smooth, silky feel. It helps makeup spread evenly.

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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Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Hot-Pressed Hexagonal Boron Nitride Ceramics Industry Ceramic

What is Hot-Pressed Hexagonal Boron Nitride (HP-HBN)?
HP-HBN is a special ceramic made by squeezing boron nitride powder under high heat and pressure. This process creates a very strong, pure material. It looks white and feels smooth.

Why is HP-HBN useful?
It handles extreme heat incredibly well. It doesn’t melt until over 3000°C. It also works as an electrical insulator even at high temperatures. Its surface is slippery, providing natural lubrication. Molten metal doesn’t stick to it. It handles sudden temperature changes well.

Where is HP-HBN used most?
You find it in demanding high-temperature jobs. It makes crucibles for melting reactive metals like aluminum. It creates parts for semiconductor processing equipment. It’s used in furnace components and as release liners. It’s essential anywhere heat, corrosion, and sticking are problems.

Is HP-HBN fragile?
It’s a ceramic, so it can be brittle like many ceramics. It breaks more easily under impact or bending force than metals. Its strength comes from handling heat and chemical attack. You must design parts carefully to avoid stress points. It handles compression forces better.

How does HP-HBN compare to graphite?
Both are lubricious and handle high heat. HP-HBN has key advantages. It’s a much stronger electrical insulator. It doesn’t oxidize in air until much higher temperatures. It doesn’t react with molten metals like aluminum. Graphite is cheaper, but HP-HBN lasts longer in harsh conditions.