In the field of advanced ceramic materials, few products have demonstrated the versatility and performance of boron nitride ceramic sheets. Known for their exceptional thermal conductivity, chemical inertness, and electrical insulation, BN sheets are widely used across semiconductor manufacturing, high-temperature furnaces, metallurgical processing, and aerospace components.

Whether you are looking for a precision-machined boron nitride plate or a custom-sized BN ceramic sheet, this material provides the stability and performance demanded by modern industries.

Boron nitride (BN) is a covalent compound composed of boron and nitrogen atoms. The hexagonal crystal form (h-BN), often called "white graphite", shares a similar layered structure to graphite — offering excellent lubricity and thermal conductivity, yet with the added benefit of being an electrical insulator.

Boron nitride ceramic sheets are manufactured by hot-pressing or sintering BN powders into dense, machinable plates. These sheets can be cut, drilled, and polished to meet tight tolerance requirements for both industrial and laboratory applications.

Boron nitride conducts heat almost as effectively as metal, yet remains electrically non-conductive, making it a perfect choice for power electronics, semiconductor heat spreaders, and laser components.

Unlike polymer or metal-based materials, BN sheets remain stable at temperatures exceeding 1000°C — ideal for use in vacuum furnaces and plasma systems.

BN ceramic sheets are non-wetting to most molten metals such as aluminum, magnesium, and zinc, making them the preferred choice for metal casting and crucible lining.

Despite their ceramic nature, BN sheets are easy to machine using conventional tools, allowing for complex shapes, fine holes, and custom dimensions with high precision.

Boron nitride ceramic sheets are used in multiple industries where thermal management and insulation are critical:

• Semiconductor processing components
  (wafer supports, chamber liners, electrode insulators)

• High-temperature furnace insulation boards

• Metal casting and foundry tools

• Plasma arc and PVD/CVD equipment parts

• Heat spreaders for power devices

• Aerospace structural insulation components

From this comparison, boron nitride stands out as the most machinable and thermally efficient among common ceramics — especially in thermal and vacuum applications.

At Great Ceramic, we supply boron nitride ceramic sheets in various grades and specifications:

• Standard sizes: 100×100 mm, 200×200 mm, 300×300 mm

• Thickness: 0.5 mm to 30 mm

• Grades:

  • BN99: Ultra-high purity (99%) for semiconductor and optical use

  • BN+AlN composite: Improved mechanical strength

  • BN+ZrO₂ composite: Enhanced toughness and stability

We also offer custom machining, including:

• Surface polishing

• Drilled or slotted sheets

• Tight tolerance dimensioning

• Small-batch prototype production

China is one of the largest producers of boron nitride ceramics, combining advanced sintering technology, stable supply chains, and competitive pricing.
Partnering with a China boron nitride ceramics supplier such as Great Ceramic ensures:

• Consistent material quality verified by international standards

• Fast customization service

• Affordable wholesale and OEM production

• Reliable global shipping and technical support