Boron nitride plate possesses excellent heat resistance, thermal stability, thermal conductivity, and high-temperature dielectric strength, making it an ideal material for heat dissipation and high temperature insulation. Because of its low density, it can be processed into diverse specific components.
Advantages of Boron Nitride Plate
- The operating temperature is 1,900℃ under vacuum conditions, 2,100℃ under the protection of nitrogen, argon and other inert gases, and the oxidation resistance temperature is 900℃.
- High thermal shock resistance, meaning that it can cool from 1,000℃ to room temperature within 15 minutes repeatedly for 100 times without cracking.
- Resistance to the corrosion of stainless steel, copper, aluminium, nickel, and other alloys.
- Does not bond or react with many metal and glass solutions.
- Excellent electrical insulation at high temperatures.
- Low thermal expansion.
- Quick delivery and simple machining.
Materials for Boron Nitride Plate
During the production of boron nitride material, nitrides, oxides, and carbides can be added to enhance the physical and chemical properties of the material.
BN-1700
This material contains 99.7% boron nitride. BN1700 is the highest grade of hBN, with the highest BN purity and no binder. Its highest working temperature is 2100℃, and can withstand repeated high and low temperature impacts, and resist carbon corrosion. It can be utilized as a setter plate for the sintering of high purity refractory alloys, transparent ceramics, aluminium nitride powder, rare earth, aluminum nitride and silicon nitride substrates, and other materials.
BN-2000
This material is composed of 99% boron nitride and is also known as BN99. This material is frequently used in electrical insulators, refractory components, and setter plates because of its strong thermal shock resistance and chemical inertness. Due to the extremely little amount of boric oxide binder included in BN2000, this material is highly susceptible to moisture absorption.
BN-2300
The mechanical properties of boron nitride material have been improved and made more resistant to erosion by the addition of aluminium oxide. It can be employed in applications that require excellent thermal shock resistance, high-temperature resistance, non-wetting, and suitable mechanical strength.
BN-2800
BN2800 exhibits high thermal conductivity and mechanical strength by incorporating aluminium nitride into a boron nitride composite. It is widely employed in the fabrication of semiconductor components and vacuum furnace seals.
BN-3000
In comparison to all other hBN ceramics, BN3000 exhibits the highest strength and best abrasion resistance thanks to the combination of boron nitride and zirconia. It is commonly utilized for molten metal side dams, continuous casting break rings, and refractories due to its non-wetting properties.
Principal Characteristics of Plates of Boron Nitride
High Thermal Conductivity
Excellent thermal conductivity of BN plates makes them efficient heat dissipators. Application where heat control is critical need this feature.
An electrical insulator
BN plates are electrical insulators even if they have a great heat conductivity. They are therefore perfect for use in electrical and electronic applications requiring both electrical isolation and heat dissipation.
Chemistry Stability
Most substances, including acids and alkalis and molten metals, are inert to boron nitride. Stability like this guarantees robustness under challenging conditions.
Temperature Stability
Both very high and very low temperatures may be tolerated by BN plates without degradation. They can function at air temperatures of up to 1000°C and at vacuum or inert conditions much higher.
Low Thermal Expansion
Low coefficient of thermal expansion of boron nitride contributes to dimensional stability in temperature swings.
Lubricity
Application needing low friction surfaces may use BN plates because of their lubricious surface, which minimizes friction and wear.
Manufacturing Processes of Boron Nitride Plates
Several important processes are involved in the manufacture of BN plates:
Powder Production
Powdered boron nitride of high purity is produced by chemical processes using nitrogen and boron molecules. Boron oxide or boric acid reacting with ammonia or nitrogen gas is one of the usual techniques.
Sizing
Binders are added to the BN powder, which is then pressed or extruded into plates. We call these sculptural creations green bodies.
Sintering
High-heat sintering of the green bodies results in densification and material strengthening. Sintering preserves purity and stops oxidation in an inert environment or vacuum.
Machine and Finishing
As needed for particular applications, BN plates are cut to exact dimensions and surface finishes after sintering.
Boron Nitride Plate Applications
Electronics and Semiconductors
High-power electronic equipment and semiconductor components employ BN plates as substrates and insulators. Reliability of operation and overheating prevention depend on their capacity to disperse heat while providing electrical insulation.
Aerospace and Defense
BN plates find use in thermal management systems, including heat shields and thermal interface materials, in the aerospace and military sectors. High-temperature applications find them perfect because of their low weight and thermal resilience.
Engineering Metallurgy
In metal casting and sintering, among other metallurgical operations, BN plates function as components and protective liners. Their thermal stability and chemical resistance support equipment protection and raise process efficiency.
Machinery and Industrial Equipment
In machinery, BN plates find use as parts like bearings, seals, and spacers that need to be highly resistant to wear and low friction. Their lubricious surface keeps mechanical components from wearing out and lasts longer.
Cutting Edge Composites and Ceramics
Advanced ceramics and composite materials are made with BN plates serving as reinforcing agents to enhance the mechanical and thermal characteristics of the materials.
Industry Nuclear
High neutron absorption cross-section and thermal stability of BN plates make them useful in the nuclear sector for radiation shielding and reactors.
