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Boron Nitride (BN) Ceramics

Boron nitride (BN) is a non-toxic thermal and chemical refractory compound with high electrical resistance and is most commonly available in colorless crystal or white powder form. It is an advanced synthetic ceramic material and is often referred to as "white graphene" or "inorganic graphite", because it has a similar hexagonal platy crystal structure to graphite, but has a much higher oxidation resistance at 800 ℃.

Read more: Boron Nitride Overview: Properties, Production, and Uses

Boron Nitride Properties:

  • High thermal conductivity
  • Easily machinability
  • Chemical Inertness
  • Low dielectric constant





Boron Nitride Ceramics Structures

Hexagonal boron nitride (hBN) is a stable phase at ordinary temperature and pressure, and cubic boron nitride (CBN) and wurtzite boron nitride (WBN) can be synthesized at high temperature and high pressure.

The hexagonal form boron nitride (HBN) corresponding to graphite is the softest and most stable form among BN polymorphs and is therefore used as a lubricant and an additive to cosmetic products. HBN can also be produced in graphene-like sheets that can be formed into boron nitride nanotubes.

The cubic boron nitride (CBN) has a high hardness which is inferior only to diamond. But unlike diamond, CBN is insoluble in metals at high temperatures, making it a useful abrasive and oxidation-resistant metal coating.

The rare wurtzite boron nitride (WBN) modification is similar to lonsdaleite, and it may even be harder than CBN.

Boron Nitride Ceramics Specification

ACM's production formulations are developed to address the varied application problems in which ceramic components are commonly used. Many industrial applications push the envelope on specific requirements leading to the development of new formulations to successfully address them.

CAS#: 10043-11-5
Powder, F.W. 24.82
Item No. Description Purity Lot Size
NI05-98 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 98 %,
B2O3 < 0.6%,
Ca < 0.015%,
Si < 0.12%
100 kg
NI05-99 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 99 %,
B2O3 < 0.4%,
Ca < 0.01%,
Si < 0.10%
100 kg

Different Grades of Boron Nitride Ceramics

Grade BN99
(Grade AX05)
(Grade A)
(Grade HP)
Composition hBN > 99.5% hBN > 98% hBN > 90%
Calcium Borate
hBN 40%, SiO2 60% (M)
hBN 60%, SiO2 40% (M26)
hBN > 45%
ZrO2 < 45%
Borosilicate < 10%
Color white white white white white gray
1.9 2.1 2 2.1-2.3 2.5-2.6 2.9
Features • Excellent corrosion resistance
• High thermal conductivity
• Thermal shock resistance
• Excellent moisture resistance
• Low thermal expansion
• Spallation resistance
• Thermal shock resistance
• High thermal conductivity
• Moisture resistance
• High thermal conductivity
• High-temperature resistance
• Easy machining
• Good wear resistance
• Chemical stability
• High thermal shock stability
Shape Rod
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Boron Nitride Ceramics Applications

Boron nitride powder has high thermal conductivity, low coefficient of friction, high dielectric constant, and is chemically inert. Due to those unique properties, it is used in a broad range of applications as follows:

Boron nitride ceramics are traditionally used as parts of high-temperature equipment because of excellent thermal and chemical stability.

BN also has potential use in nanotechnology. Boron nitride nanotubes can be produced that have a structure similar to that of carbon nanotubes, i.e. graphene (or BN) sheets rolled on themselves, but the properties are very different.

H-BN Ceramic is usually used to make BN crucible. C-BN is used as an abrasive and is an ideal material for heat spreaders. W-BN is an ideal dielectric substrate material for optical, electronic, and 2-D graphene-based devices.

ACM Ceramic Product Video

Your Boron Nitride Ceramics Supplier

Advanced Ceramic Materials (ACM) is a leading supplier of boron nitride ceramic products of the highest quality for a wide range of applications. We are happy to provide advice on materials, design, and application. Feel free to contact us with any questions about boron nitride or other ceramic materials that are not listed on the website.





Q: What Are the Properties of BN Ceramic?
A: - Heat and chemical resistance: The compound has a melting point of 2,973°c and a thermal enlargement coefficient significantly above that of the diamond. Its hexagonal shape resists decomposition even if exposed to a 1000°c in ambient air. Boron nitride doesn’t dissolve in not unusual acids. - Thermal conductivity: At 1700 to 2000 w/mk, boron nitride has a thermal conductivity this is comparable with that of graphene, a similarly hexagon-latticed compound however made up of carbon atoms. - Lubricating property: Boron nitride has the capacity to reinforce the coefficient of friction of lubricating oil, whilst decreasing the capability for put-on. - Density: Depending on its form, its density ranges from 2. 1 to 3.5 g/cm3.
Q: What Do the Three Main Crystalline Forms Mean?
A: Three main crystalline forms, known as hexagonal boron nitride (h-BN), cubic boron nitride (c-BN), and wurtzite boron nitride (w-BN). Hexagonal BN is the most stable and soft form, which is why it is used as a lubricant and additive to cosmetic products. There are other polymorphic but less common forms, such as a-BN, t-BN, r-BN, m-BN, and o-BN.
Q: How To Produce Boron Nitride Powder?
A: - Solid-State Synthesis - Precipitation & Coprecipitation - Spray Pyrolysis - Sol-Gel Method - Hydro-Thermal Further reading: 5 Boron Nitride Powder Production Methods
Q: What Is Pyrolytic Boron Nitride?
A: Pyrolytic boron nitride is abbreviated as Pyrolytic BN or PBN, and also known as Chemical vapour-deposited Boron Nitride, Chemical Vapour-deposition of Boron Nitride or CVD-BN. As the name suggests, this is a kind of boron nitride prepared by high temperature pyrolysis reaction by chemical vapor deposition.
Q: What Are the Main Uses of PBN Ceramic?
A: (1) Compound semiconductor single crystal growth container (2) Crucibles for molecular beam epitaxy (3) Crucibles for OLED (4) PBN ring and PBN sheet (5) PBN thin-film coating
How to Choose Ceramic Materials?
Typical requirements for the properties of the ceramic materials depending on the specific application
Boron Nitride Ceramics Safety Data Sheet
Product name : Boron nitride Brand : ACM CAS-No. : 10043-11-5
PBN Product Manual
HBN Product Manual
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