Technical Ceramics Manufacturer Hexagonal Boron Nitride Bushing

 Boron Nitride/BN is a synthetic technical ceramic material, which is available in powder, solid, aerosol and liquid  forms. In solid form it can be machined easily with ordinary metalworking tools. Boron Nitride has out-standing  thermal characteristics; high thermal conductivity and excellent thermal shock resistance. Boron Nitride in solid form  is available in 3 grades, each having different characteristics

 HPBN most common grade is manufactured by hot pressing. Its crystal structure is hexagonal. Due to the uniaxial  densification method, the anisotropy of HPBN platelet structure is created. As a result of the anisotropy, different  physical properties occur, parallel or perpendicular to the pressing direction. HPBN is non toxic and can be easily  machined.

 Overview of typical properties:

 • Good electrical insulation;

 • High mechanical strength;

 • Excellent wear resistance;

 • Excellent corrosion resistance;

 • Low dielectric constant;

 • High using temperature;

 • High thermal shock resistance...

 Overview of typical applications:

 • Pump seals and other components;

 • Wear resistant inserts;

 • Insulating washers or bushings;

 • Semiconductor components;

 • Aerospace components;

 • Automotive sensors;

 • Electrical or electronic insulators...

 Type

99BN

CBN

ABN

ZBN

 Main Content

BN>99%

BN>98.5%

BN+AlN

BN+ZrO2

 Binder

B2O3

CaB2O6

ALBO3

B2O3

 Density    (g/cm3)

1.95-2.0

2.0-2.1

2.6

2.95

 Flexural Strength    (Mpa)

30

100

200

200

 Compressive Strength    (Mpa)

100

280

350

380

 Electrical Resistivity    (ohm.cm)

>10^14

>10^13

>10^14

>10^12

 Max. Working Temp.    (°C)

air

900

900

900

1000

inert gas

2400

2400

2100

1800

vacuum

2200

2200

1900

1800

 Thermal Conductivity    (W/m.K)

20

35

50

30

 Expansion Coefficient  25 - 1000 °C (10^-6/K)

1.5

2

4.5

2.5

 - Aluminium Oxide / Alumina ( 95% 96% 99% 99.5% 99.7% Al2O3 )
 - Zirconium Oxide / Zirconia ( Yttria stabilized ZrO2 )
 - Silicon Nitride ( Gas pressure sintered & Hot pressed Si3N4 )
 - Boron Carbide ( B4C )
 - Boron Nitride ( Hot pressed hexagonal BN )
 - Machinable Glass Ceramic

 Aiming at building long term cooperation relationship with our clients, we set our motto as "Quality First". Far now,  our products have been exported to North Amirica, East Europe, West Europe, East Asia, Southeast Asia and get  good reputation from our client.

 >>> Advanced ceramics - also referred to as engineering, structural or technical ceramics - have been processed to  be very pure and, in general, have superior properties to unrefined ceramics. Many are man-made, i.e. they do not  occur naturally, e.g. silicon nitride, and their properties can be enhanced to produce very high strength at high  temperatures, good corrosion resistance, etc.

 Q2: What types of ceramic do you supply?
 >>> Alumina in purity from 90% to 99.7%, yttria stabilized zirconia (Y-PSZ), hot pressed boron nitride, machinable  glass ceramic, boron carbide, silicon nitride, mullite and cordierite.

 Q3: Can I machine the ceramics myself?
 >>> The harder ceramics like alumna and zirconia will require diamond tooling but other materials like Machinable  Glass Ceramic and Hot Pressed Boron Nitride can be machined. To get the right result it does take time, experience  and semi-specialised tooling but it can be done and many of our customers take advantage of this when they need  extremely fast solutions in-house.

 Q4: Can I get a sample or purchase a small quantity?
 >>> Yes, we are happy to supply small samples of material for you to test. We can also supply prototype quantities  through to volume production to suit your needs.

 Q5: How long will it take for you to send me a quote?
 >>> This depends totally on the complexity of your requirements. For simple items such as bars and rods, we can  generally supply a quotation within 24 hours.

 Q6: What's the delivery time?
 >>> For our standard products, like ceramic protection tubes and insulating rods, delivery time is normally 7 working  days. For hot pressed boron nitride and machinable glass ceramic, it's about 10 working days. For customized  products made of alumina, zirconia, boron carbide and silicon nitride, total producing time is about 30 working days.