Boron Nitride machinable ceramic is an advanced synthetic ceramic material available and made by hot pressing boron nitride powder at high temperature and pressure. Its unique properties – from high heat capacity and outstanding thermal conductivity to easy machinability, lubricity, low dielectric constant and superior dielectric strength – make boron nitride a truly outstanding material.
Boron Nitride Ceramic is available in a variety of solid grades, differentiated by binder and composite. The unique combination of highly exceptional thermal, physical and chemical characteristics of boron nitride ceramic makes it ideal for solving tough challenges in a wide range of industrial applications.
DMCERA® Machinable Ceramics, Grade BN-HB
DMCERA® Machinable Ceramics BN-HB is hot-pressing boron nitride ceramics with the highest purity boron nitride powder. It can be used in highest temperature (>2000 ºC) in inert or vacuum environments. It is an excellent choice for applications where high temperature capabilities and corrosion resistance are important.
Advantages:
● High purity materials (BN>99.5%) and binder-less ceramic.
● No react with metals.
● Highest temperature (2300 ºC in inert).
Applications:
● Crucibles for high-purity molten metals.
● Nozzles for specialty alloys.
● Insulators for high temperature.
● Insulators and protective tubes for high-temperature furnaces.
Specifications:
| Grade | BN-HB | |
| Compositions | BN>99% | |
| Binder | Self Binder | |
| Density | g/cm3 | 1.9-2.0 |
| 25°C Volume Resistivity | Ω·cm | >1014 |
|
Max. Service Temp. (°C) |
Oxygen | 900 |
| Inert Gas | 2300 | |
| High Vacuum | 1800 | |
| Flexural Strength | Mpa | 25 |
| Compressive Strength | Mpa | 100 |
|
Coefficient of Thermal Expansion 25-1000°C |
10-6/K |
0-2 |
| Thermal Conductivity | W/mK | 50 |
DMCERA® Machinable Ceramics, Grade BN-BO
DMCERA® Machinable Ceramics BN-BO uses B2O3 binder to add mechanical strength to hot pressed hBN. Higher density and not lose powder from the ceramic. This makes it an excellent choice for high temperature insulators in electron industry and can do some specialty nozzle, etc.
Due to the hygroscopic binder system, BN-BO must be used to avoid exposure to moisture
Advantages:
● High density and high purity bn powder, practical choice for high temperature insulators.
● No lose powder from the ceramic, excellent choice for specialty blowing mouth and nozzles.
● Excellent machining performance can be machined based on any drawing.
Applications:
● Applications as blowing nozzles.
● Used in Ion Implanters.
● As high temperature insulators, kiln furniture.
● Good for electron industry and continues to finds new applications.
Specifications:
| Grade | BN-BO | |
| Compositions | BN>98% | |
| Binder | B2O3 | |
| Density | g/cm3 | 2.1-2.2 |
| 25°C Volume Resistivity | Ω·cm | >1013 |
|
Max. Service Temp. (°C) |
Oxygen | 900 |
| Inert Gas | 2000 | |
| High Vacuum | 1800 | |
| Flexural Strength | Mpa | 75 |
| Compressive Strength | Mpa | 100 |
|
Coefficient of Thermal Expansion 25-1000°C |
10-6/K |
2.0 |
| Thermal Conductivity | W/mK | 30 |
DMCERA® Machinable Ceramics, Grade BN-SZ
DMCERA® Machinable Ceramics BN-SZ uses silicon carbide and zirconia binder system. With this system, improve thermal shock resistance and erosion resistibility. Most commonly used as break ring for horizontal continuous casters and nozzles for amorphous thin-strip. Its chemical stability, thermal shock resistance and corrosion resistance properties a wide variety of molten-metal-contact applications.
Advantages:
● Good chemical stability.
● Good erosion resistibility.
● Good thermal shock resistance.
Applications:
● Applications as continuous casting break rings.
● Nozzles for metal atomizing and powder metal atomization.
● Side dams for thin strip casting.
● A variety of molten metal contact applications.
Specifications:
| Grade | BN-SZ | |
| Compositions | BN+SiC+ZrO2 | |
| Density | g/cm3 | 2.3-3.0 |
| 25°C Volume Resistivity | Ω·cm | >1012 |
|
Max. Service Temp. (°C) |
Oxygen | 900 |
| Inert Gas | 1700 | |
| High Vacuum | 1700 | |
| Flexural Strength | Mpa | 100 |
| Compressive Strength | Mpa | 300 |
| Coefficient of Thermal Expansion 25-1000°C |
10–6/K |
4.0 |
| Thermal Conductivity | W/mK | 40 |
DMCERA® Machinable Ceramics, Grade BN-AN
DMCERA® Machinable Ceramics BN-AN composites by a novel process referred to as transient plastic phase processing (TPPP). The relative density of hot-pressed composites decreased with increasing BN content, but over 99% could be obtained with 30% BN in AlN.BN-AlN gears offer a reliable driving performance under high temperature gas atmospheres in which quartz etc. cannot be used.
Advantages:
● Higher hardness and good wear resistance.
● High mechanical strength and thermal conductivity.
● Used as gears offer a reliable driving performance etc.
Applications:
● Insulator.
● Component for semiconductor equipment.
● Jig material for molding glass.
● Bearing and cogwheel.
Specifications:
| Grade | BN-AN | |
| Compositions | BN+AIN | |
| Binder | AlBO3 | |
| Density | g/cm3 | 2.5-2.6 |
| 25°C Volume Resistivity | Ω·cm | >1014 |
|
Max. Service Temp. (°C) |
Oxygen | 900 |
| Inert Gas | 2100 | |
| High Vacuum | 1900 | |
| Flexural Strength | Mpa | 130 |
| Compressive Strength | Mpa | 250 |
|
Coefficient of Thermal Expansion 25-1000°C |
10-6/K |
4.5 |
| Thermal Conductivity | W/mK |
60 |
