BN Boron Nitride is often referred to as white graphite because it has a microstructure similar to that of graphite. However, unlike graphite, boron nitride is an excellent electrical insulator that has a higher oxidation temperature. It offers high thermal conductivity and good thermal shock resistance and can be easily machined to close tolerances in virtually any shape. After machining, it is ready for use without additional heat treating or firing operations.
In inert and reducing atmospheres, BN will withstand temperatures over 2,000°C. It is commonly used as an insulator in contact with tungsten and graphite electrodes at those temperatures. All Boron Nitride grades can be used in oxidizing atmospheres up to 750°C. It is not wet by most molten metals and slags and can be used in contact with most molten metals including aluminum, sodium, lithium, silicon, boron, tin, germanium, and copper.
Boron Nitride is available in a variety of solid grades, differentiated by binder and composite: BN-2000, BN-2300, BN-2800, BN-3000...
Hexagonal Boron Nitride has the same type of layer structure as graphite and provides a very good lubrication/mold-release characteristic. BN is stable up to approximately 2000°C in the inert atmosphere.Besides, Boron Nitride is stable against most organic solvents and corrosive chemicals, and unwettable by most molten metals and glasses. Boron Nitride has high electrical insulation and voltage resistance at high temperature and no changes in permittivity and dielectric loss up to high-frequency area. As for its lubricity and mold-release efficiency, friction coefficient of Boron Nitride does not change up to considerably high temperature in nitrogen atomosphere, which enables use up to approximately 950°C in the air. What's more, because of high thermal conductivity and high heat radiation, BN can be applied to various kind of heat radiators.
Alumina / Al2O3 is an excellent electrical insulator and one of the most widely used advanced ceramic materials. Additionally, it is extremely resistant to wear and corrosion. Alumina components are used in a wide range of applications such as electronics, pump components and automotive sensors. UNIPRETEC offers a variety of alumina compositions, including 92% Alumina, 95% Alumina, 96% Alumina, 99% Alumina, 99.5% Alumina and 99.8% Alumina.
Silicon carbide / SiC, exceedingly hard, synthetically produced crystalline compound of silicon and carbon. Its chemical formula is SiC. Since the late 19th century silicon carbide has been an important material for sandpapers, grinding wheels, and cutting tools. More recently, it has found application in refractory linings and heating elements for industrial furnaces, in wear-resistant parts for pumps and rocket engines, and in semiconducting substrates for light-emitting diodes.
Silicon Nitride / Si3N4 is a high performance ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications.
Zirconia / ZrO2 - Unlike traditional ceramics that tend to be hard and brittle, Zirconia offers high strength, wear resistance, and flexibility far beyond those of most other technical ceramics. Zirconia is a very strong technical ceramic with excellent properties in hardness, fracture toughness, and corrosion resistance. Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics with metals like steel.
Alumina / Al2O3 is an excellent electrical insulator and one of the most widely used advanced ceramic materials. Additionally, it is extremely resistant to wear and corrosion. Alumina components are used in a wide range of applications such as electronics, pump components and automotive sensors. UNIPRETEC offers a variety of alumina compositions, including 92% Alumina, 95% Alumina, 96% Alumina, 99% Alumina, 99.5% Alumina and 99.8% Alumina.
Silicon carbide / SiC, exceedingly hard, synthetically produced crystalline compound of silicon and carbon. Its chemical formula is SiC. Since the late 19th century silicon carbide has been an important material for sandpapers, grinding wheels, and cutting tools. More recently, it has found application in refractory linings and heating elements for industrial furnaces, in wear-resistant parts for pumps and rocket engines, and in semiconducting substrates for light-emitting diodes.
Silicon Nitride / Si3N4 is a high performance ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications.
Zirconia / ZrO2 - Unlike traditional ceramics that tend to be hard and brittle, Zirconia offers high strength, wear resistance, and flexibility far beyond those of most other technical ceramics. Zirconia is a very strong technical ceramic with excellent properties in hardness, fracture toughness, and corrosion resistance. Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics with metals like steel.
Alumina / Al2O3 is an excellent electrical insulator and one of the most widely used advanced ceramic materials. Additionally, it is extremely resistant to wear and corrosion. Alumina components are used in a wide range of applications such as electronics, pump components and automotive sensors. UNIPRETEC offers a variety of alumina compositions, including 92% Alumina, 95% Alumina, 96% Alumina, 99% Alumina, 99.5% Alumina and 99.8% Alumina.
Boron Nitride / BN machinable ceramic is made by hot pressing Boron Nitride powders at high temperature and pressure. UNIPRETEC's Boron Nitride (BN) can easily be machined into rods, bars, plates and even intricate custom shapes.The unique combination of highly exceptional thermal, physical and chemical characteristics of BN Boron Nitride ceramic makes it ideal for solving tough challenges in a wide range of industrial applications.
Silicon carbide / SiC, exceedingly hard, synthetically produced crystalline compound of silicon and carbon. Its chemical formula is SiC. Since the late 19th century silicon carbide has been an important material for sandpapers, grinding wheels, and cutting tools. More recently, it has found application in refractory linings and heating elements for industrial furnaces, in wear-resistant parts for pumps and rocket engines, and in semiconducting substrates for light-emitting diodes.
Silicon Nitride / Si3N4 is a high performance ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications.
A960 Alumina offers consistently reliable and convincing performance even when subject to high thermal and electrical loads in terms of its: Thermocycling capability, Thermal shock resistance, Flexural strength, Surface quality, Thermal conductivity. This makes A960 Alumina Ceramic Substrates ideal for power electronics in conjunction with direct copper bonding (DCB) and active metal brazing (AMB).
ALN Aluminum Nitride - with outstanding insulating properties and extremely high thermal conductivity (â?¥ 170 W/mK), Aluminum Nitride is perfect for the extremely high performance required in the electronics industry. AlN ceramic enables the compact, affordable construction of components and hybrid designs with high integration density. Extraordinary mechanical strength and a low thermal expansion coefficient enable seamless system integration.
Alumina ceramic (Aluminum Oxide or Al2O3) is an excellent electrical insulator and one of the most widely used advanced ceramic materials. Additionally, it is extremely resistant to wear and corrosion. Alumina components are used in a wide range of applications such as electronics, pump components and automotive sensors. UNIPRETEC offers a variety of alumina compositions, including 92% Alumina, 95% Alumina, 96% Alumina, 99% Alumina, 99.5% Alumina and 99.8% Alumina, but the 95% Alumina and 99% are the most widely used materials. Alumina components can be formed by a variety of manufacturing techniques such as uniaxial pressing, isostatic pressing, injection molding and extrusion. Finishing can be accomplished by precision grinding and lapping, laser machining and a variety of other processes.Silicon nitrides (Si3N4) feature an excellent combination of material properties. They are nearly as light as silicon carbide (SiC), but their microstructure gives them excellent thermal shock resistance and their high fracture toughness makes them resistant to impacts and shocks.Unlike traditional ceramics that tend to be hard and brittle, Zirconia offers high strength, wear resistance, and flexibility far beyond those of most other technical ceramics. Zirconia is a very strong technical ceramic with excellent properties in hardness, fracture toughness, and corrosion resistance; all without the most common property of ceramics high brittleness. Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics with metals like steel. Due to Zirconias unique properties it is sometimes referred to as the ceramic steel.
Silicon Nitride (Si3N4) is a man made compound synthesized through several different chemical reaction methods. Parts made of Si3N4 are pressed and sintered by well developed methods to produce a ceramic with a unique set of outstanding properties. Silicon Nitride Ceramic is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts with a striking appearance. The very high quality bodies developed for these demanding high reliability applications are available today and can be used in many severe mechanical, thermal and wear applications.What's more, Silicon Nitride Si3N4 is an electrical insulator and is not wet by nonferrous alloys. Silicon nitride is a rather expensive material, but its performance to cost benefit ratio is excellent in the applications where it can outperform the normally utilized materials with long life and very reliable low maintenance operation.Zirconium oxide (Zirconia) is an extremely tough ceramic with a hardness of >9 Mohs which makes it and excellent material for extreme wear, high temperature and harsh environment applications. Zirconia ceramics have remarkable properties of strength, hardness and wear resistance in addition to withstanding attack from molten metal, organic solvents, acids and alkalis. They can also withstand high temperatures for long periods even under severe mechanical stress. Typical Applications include: volatile chemical solutions transportation, jet and diesel engine components, containers for molten metals, high speed cutting tools, high wear components, transistor insulators, dental implants, bearing balls, pump seals, and ball valves. Contact us for more info!
Unlike traditional ceramics that tend to be hard and brittle, Zirconia offers high strength, wear resistance, and flexibility far beyond those of most other technical ceramics. Zirconia is a very strong technical ceramic with excellent properties in hardness, fracture toughness, and corrosion resistance; all without the most common property of ceramics high brittleness. Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics with metals like steel. Due to Zirconias unique properties it is sometimes referred to as the ceramic steel.
Silicon nitrides (Si3N4) are a range of advanced engineering ceramics characterised by high strength, toughness and hardness and excellent chemical and thermal stability. The current interest in silicon nitride based engineering materials essentially developed from the research in the 1980s into ceramic parts for gas turbine and piston engines. It was envisaged that an engine, predominately made from silicon nitride based parts, such as sialon, would be light weight and be able to operate at higher temperatures than traditional engines resulting in higher efficiencies. Ultimately however, this goal was not realised as a result of a number of factors including cost, the difficulty in reliably fabricating the parts and the inherent brittle nature of ceramics. However, this work led to the development of a number of other industrial applications for silicon nitride based materials, such as in metal forming, industrial wear and molten metal handling.
Zirconia ceramic blades are extremely sharp blades. Recent developments have made it possible to produce blades from transformation-toughened zirconia (ZrO2), commonly referred to as "zirconia ceramic". Although not recommended for high shock applications, the Rc 75 hardness and low friction coefficient make zirconia ceramic particularly effective in film slitting operations, where blade life can be more than 100 times that of conventional steel.
