Products Description

Boron Nitride (BN) ceramic rings are high-performance engineered components made primarily from boron and nitrogen, representing a critical category within advanced boron nitride ceramics. They exhibit a crystal structure similar to carbon, commonly appearing in hexagonal (hbn ceramic / h-BN) or cubic (c-BN) forms. Hexagonal boron nitride ceramic is widely used for its excellent boron nitride machining capability, or machinable boron nitride properties, and thermal stability, earning it the nickname "white graphite." These rings can be manufactured via various processes, including hot pressed boron nitride and chemical vapor deposition to create pyrolytic boron nitride (pbn) or pbn pyrolytic boron nitride forms.

Boron Nitride Ceramic Rings

Product name	Boron Nitride Ceramic Rings
Color	Customized according to the client's requirements
size	Customized according to the client's requirements
Packaging	Carton /Pallet/Wooden case (According to client requirement )
Delivery time	Standard Product-Within 3 days
Items Design	According to the client's drawing or samples
Features	Good quality, low price, Multiple factories, deliver to you based on the one closest to your location
Application	Industrial Ceramics
Certificate	ISO, CE

Ceramics performance parameter

Number	Performance	Unit	Boron nitride	Boron nitride	Boron nitride
			Boron nitride	Boron nitride	Boron nitride
			BN99.9%	BN99.7%	BN99.5%
1	Density	g/cm3		1.6	1.9
2	Flexural strength	MPa	94~95	20	35
3	Fracture toughness	MPa·m1/2		8	11~14
4	Dielectric constant	εr(20℃,1MHz)	4.37	1.9~3.8	1.9~3.8
5	Hardness	GPa	1.15	2	4
	Hardness	HRC		35	40
6	Volume resistivity	Ω·cm(20℃)		10 14	10 14
7	Elastic modulus	GPa	29.4
8	Coefficient of thermal expansion	×10-6/k		1`1.5	0.6(x10-6/K) RT-1500℃
9	Compressive strength	MPa	118~120	30	30
10	Abrasions	g/cm2		0.3	0.3
11	Thermal conductivity	W/m×k(20℃)		35	63~75W/mk
12	Poisson's ratio	/		0.5	0.5
13	Insulation strength	kv/mm		28	28
14	Temperature	℃	1000 in air/2200 in inert atmosphere	1000 in air/2200 in inert atmosphere	850 in air/2200 in inert atmosphere

Performance Characteristics

High Thermal Stability: Can withstand temperatures up to approximately 3000°C in inert atmospheres.
Excellent Thermal Conductivity: Possesses high bn thermal conductivity while serving as an effective electrical boron nitride insulator. The thermal conductivity of boron nitride, specifically hexagonal boron nitride thermal conductivity, ranges significantly, contributing to its role as an excellent heat spreader.
Outstanding Electrical Insulation: Maintains high resistivity even at elevated temperatures, a key feature of ceramic boron nitride.
Low Dielectric Constant and Loss: Ideal for high-frequency and high-voltage applications.
Good Chemical Inertness: Resistant to corrosion from most molten metals, salts, and acids. This inertness is leveraged in applications like pbn coating for protection.
High Lubricity: Exhibits low friction coefficients similar to graphite.
Excellent Machinability: Hexagonal BN can be easily machined into precise, complex shapes, enabling the production of boron nitride tube, boron nitride plate, and boron nitride sheet components.

Products Application

High-Temperature Furnaces: Used as crucibles, setters, and insulating components, often made from hot pressed boron nitride.
Semiconductor Processing: Employed as fixtures, insulators, and plasma etch components due to the ultra-high purity of pyrolytic boron nitride pbn and low particle generation.
Metal Casting and Processing: Serve as release agents, break rings in continuous casting, and components for handling molten metal.
Electronics and RF: Utilized as substrates, insulators, and heat spreaders in high-power and high-frequency devices, benefiting from the bn thermal conductivity.
Aerospace: Applied in radar windows, antenna housings, and thermal management systems using boron ceramics or boron ceramic components.
Industrial Equipment: Function as high-temperature bearings, seals, and insulating washers. Advanced materials like the pbn compound (also known as nitrure de bore pyrolytique) and boron nitride sheets are essential in these demanding environments.