Boron Nitride Powder (BN, Spherical & Flaky)

Boron Nitride Powder Price & List

Spec.	Purity	Shape	Available
BN-NF100	＞99%	Flaky	APS 100 nm
BN-UF500	＞99%	Flaky	APS 500 nm
BN-EF005	＞99%	Flaky	D50 5±1 um
BN-EF010	＞99%	Flaky	D50 10±3 um
BN-FF015	＞99%	Flaky	D50 15±5 um
BN-FF030	＞99%	Flaky	D50 30±8 um
BN-ES005	＞99%	Spherical	D50 5-10 um
BN-FS030	＞99%	Spherical	D50 30±10 um
BN-MS070	＞99%	Spherical	D50 70±10 um
BN-MS100	＞99%	Spherical	D50 100±10 um
BN-MS120	＞99%	Spherical	D50 120±10 um
BN-CS180	＞99%	Spherical	D50 180±10 um
BN-CS200	＞99%	Spherical	D50 200±20 um
BN-MI100	＞99%	Irregular	-100 mesh
BN-MI080	＞99%	Irregular	-80 mesh
Customizable	＞99%	Customizable	Sieve as required

Note: We provide customized service. If you don't find the powder you want, please send us an email directly. We can customize it according to your requirements.

Boron Nitride Powder

Boron nitride powder is an inorganic non-metallic material powder composed of boron and nitrogen atoms bonded by strong covalent bonds, with the chemical formula BN. It is known as "white graphite" because it shares a similar layered crystal structure and high lubricity with graphite. However, its properties and applications extend far beyond this, playing a critical role in many cutting-edge technological fields.

Core Characteristics

The most unique aspect of boron nitride material lies in its existence in multiple crystal phases, similar to carbon allotropes. Different crystal phases of boron nitride powder exhibit distinct properties, with the most common and important being hexagonal boron nitride.
High Thermal Conductivity and Excellent Electrical Insulation
Similar to aluminum nitride, hexagonal boron nitride is an excellent electrical insulator while also possessing relatively high in-plane thermal conductivity (approximately 30-100 W/(m·K)). This makes it an ideal material for applications requiring both heat dissipation and electrical insulation.
Excellent Lubricity
Hexagonal boron nitride has a layered structure where the layers are connected by weak van der Waals forces, allowing them to slide easily. This results in an extremely low coefficient of friction and outstanding lubricating properties. It is a high-temperature lubricant and the preferred choice for high-temperature solid lubricants.
Exceptional High-Temperature Resistance and Thermal Stability
In an inert atmosphere, boron nitride can withstand temperatures up to 2800°C without melting. In air, its oxidation resistance temperature can reach over 900°C, far exceeding that of graphite.
Chemical Inertness
It exhibits excellent corrosion resistance to most molten metals, glass, and salts, and does not react with most acids or bases.
Wide Bandgap Properties
Cubic boron nitride is the second hardest material after diamond, but its synthesis typically requires high pressure. Hexagonal boron nitride is also a wide bandgap semiconductor with significant potential in deep ultraviolet optoelectronic devices.
Machinability and Whiteness
Hexagonal boron nitride has a soft texture and is easy to machine. Additionally, it is white, giving it an advantage in applications where color matters, such as in cosmetics and coatings.

Boron Nitride Powder Application

Boron nitride powder is an advanced ceramic material with unique and versatile properties. Its hexagonal crystal phase combines lubrication, electrical insulation, thermal conductivity, high-temperature resistance, and chemical inertness, making it indispensable across a wide range of fields, from heavy industry to daily cosmetics. Meanwhile, its cubic crystal phase reigns supreme in the field of superhard materials. As a result, boron nitride powder is acclaimed as "white graphite" and the "industrial monosodium glutamate," serving as a critical foundational material in modern manufacturing and high-tech industries. Its specific applications are as follows:
High-Temperature Solid Lubricant and Release Agent
This is the most classic application of hexagonal boron nitride. Under extreme conditions such as high temperatures and high pressure, conventional lubricants fail, while h-BN powder can provide stable lubrication. It is widely used in metal forming (e.g., aluminum and copper extrusion) and glass mold release.
Thermal Conductive and Electrically Insulating Filler
Adding h-BN powder to polymers (plastics, rubber, resins) enables the production of highly thermally conductive and electrically insulating composite materials. These are used in electronic packaging, thermal pads, LED heat dissipation substrates, and more.
Cosmetics Industry
Leveraging its smooth texture, chemical inertness, white color, and oil-absorption properties, h-BN is used as a filler in high-end cosmetics (such as foundation and loose powder) to provide a silky feel and long-lasting performance.
High-Temperature Ceramics and Refractory Materials
h-BN can be used to manufacture crucibles, molten metal transfer tubes, high-temperature furnace components, and more, utilizing its properties of high-temperature resistance, thermal shock resistance, and non-wettability with molten metals.
Personal Care and Electronic Products
As a thermally conductive filler, it is used in thermal dissipation films or sheets for 5G smartphones, helping to dissipate heat efficiently.
Superhard Materials (Cubic Boron Nitride)
c-BN powder is used to manufacture cutting tools and abrasives. It is particularly suitable for processing hard and tough ferrous metals (such as mold steel). Its thermal stability surpasses that of diamond, and it does not react with iron at high temperatures.

Spherical Boron Nitride Powder

Spherical boron nitride powder is an advanced ceramic powder produced by processing ordinary irregularly shaped hexagonal boron nitride powder into spherical particles through specialized spheroidization techniques. It perfectly retains the core advantages of hexagonal boron nitride, such as lubricity, high thermal conductivity, electrical insulation, high-temperature resistance, and chemical inertness, while achieving revolutionary improvements in physical properties through this morphological transformation. It is a specialized material for high-end applications.
  

Core Characteristics

All the advantages of spherical boron nitride powder stem from its unique spherical geometric structure:
Extremely High Flowability and Packing Density
Spherical particles act like tiny ball bearings, significantly reducing inter-particle friction and mechanical interlocking, thereby giving the powder excellent flowability. This is crucial for processes such as automated precision feeding and 3D printing powder spreading. The spherical shape enables the tightest packing, markedly increasing the powder's packing density.
High Filling Content and Low Viscosity
When used as a functional filler in polymer materials (such as epoxy resin, silicone, or plastics), spherical particles allow for a higher filler loading at the same volume fraction while significantly reducing the viscosity of the mixture.
Benefits include:
Higher Thermal Conductivity: Enables the creation of more thermal pathways, greatly enhancing the thermal conductivity of the composite material.
Better Processability: Low viscosity makes processes such as potting, injection molding, and coating smoother and easier to handle.
Isotropic Properties
Spherical particles are symmetrical in all directions. Consequently, composite materials made from them exhibit high consistency in thermal conductivity, mechanical strength, and coefficient of thermal expansion. This avoids performance variations caused by filler orientation, enhancing the reliability and stability of the product in different directions.
Smooth Surface and Uniform Stress Distribution
The smooth spherical surface lacks sharp edges and corners, allowing it to act as "stress balls" that uniformly distribute externally applied stress. In composite materials, this effectively reduces internal stress concentration, improving the product's fatigue resistance and durability.

Spec.	Purity	Shape	Available
BN-ES005	＞99%	Spherical	D50 5-10 um
BN-FS030	＞99%	Spherical	D50 30±10 um
BN-MS070	＞99%	Spherical	D50 70±10 um
BN-MS100	＞99%	Spherical	D50 100±10 um
BN-MS120	＞99%	Spherical	D50 120±10 um
BN-CS180	＞99%	Spherical	D50 180±10 um
BN-CS200	＞99%	Spherical	D50 200±20 um
Customizable	＞99%	Customizable	Sieve as required

Main Application 

Leveraging its comprehensive advantages, spherical boron nitride powder is primarily used in cutting-edge fields that demand high performance, consistency, and processability:
High-End Thermally Conductive and Electrically Insulating Composite Materials
Used to produce thermal greases, thermal adhesives, thermal pads, and packaging materials with ultra-high thermal conductivity. In high-power-density applications such as 5G communication, high-performance computing chips, and AI servers, it serves as a "secret weapon" for achieving efficient heat dissipation and reliable insulation.
High-End Cosmetics and Personal Care Products
Spherical h-BN powder provides an exceptionally silky touch and smooth spreadability, is chemically inert, and safe for the skin. It is an ideal filler for top-tier foundations, loose powders, primers, and other products, enhancing the user experience and cosmetic finish.
High-Performance Thermal Management Engineering Plastics
Added to engineering plastics like PEEK, PA, and PC to create components that combine excellent heat dissipation capability, electrical insulation, and mechanical strength. Used in lightweight, highly integrated electronic device housings, automotive parts, etc.
3D Printing Materials
In 3D printing processes such as Selective Laser Sintering, powder flowability is critical to the success and precision of the printing process. Spherical boron nitride powder is an ideal material for printing heat sinks and insulating structural components with complex shapes.
Advanced Lubricating Grease and Oil Additive
Adding spherical h-BN to lubricating oils or greases can reduce friction and wear through its ball-bearing effect, particularly noticeable during startup, and it remains effective under high-temperature conditions.

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