Nippon Tungsten developed fine ceramics since 1960s and has been a pioneer of those in Japan by adopting new technologies like HP and HIP method. The production of fine ceramics was started with alumina ceramics (white ceramics) and Al2O3-Tic (black ceramics). Nowadays it shows its development with various materials besides general oxides, such as carbides, nitrides and their compositions. In accordance with this, the applications of ceramics have ranged from cutting tools to wear & corrosion resistant components, semiconductor products and molds, so that ceramics become indispensable to the advanced machinery.
We offer a wide variety of fine ceramics to suit various applications, required strength, usage environments and so on.
We offer a wide variety of fine ceramics to suit various applications, required strength, usage environments and so on.
Various Properties of Ceramic Materials
Mechanical Property
| Notation | Material | Color | Density (g/cm3) | Hardness HV | Hardness HRA | Bending strengyth (MPa) | Young's modules (GPa) |
|---|---|---|---|---|---|---|---|
| NPA-2 | Al2O3+TiC | Black | 4.2 | 2000 | 94.0 | 840 | 390 |
| NPA-03 | Al2O3 | White | 3.9 | 1700 | 92.5 | 520 | 310 |
| NPZ-1 | ZrO2 | Gray | 6.0 | 1250 | 91.0 | 1800 | 210 |
| NPZ-10 | ZrO2 | White | 6.0 | 1200 | 91.0 | 1500 | 190 |
| NPZ-2 | ZrO2+NbC | Black | 6.5 | 1450 | 91.5 | 1700 | 240 |
| NPZ-28 | ZrO2+WC | Black | 10.7 | 1650 | 92.5 | 2000 | 330 |
| NPZ-96 | ZrO2 | Black | 6.0 | 1100 | 90.0 | 1300 | 180 |
| NPS-1 | SiC | Gray | 3.1 | 2300 | 94.0* | 500 | 390 |
| NPS-5 | SiC | Black | 3.1 | 2300 | 94.0* | 550 | 410 |
| NPN-3 | Si3N4 | Black | 3.3 | 1850 | 93.5 | 1400 | 310 |
| NPL-3 | AlN | Gray | 3.3 | 1000 | 87.0 | 400 | 310 |
| NPCR-2 | Cordierite system | Black | 2.5 | 800 | - | 200 | 130 |
*HR30N
Thermal & Electrical Properties
| Notation | Material | Coefficient of thermal expansion (x10-6/K) | Thermal conductivity (W/(m*K)) | Electrical resistivity (Ω*m) | Thermal shock resistance Δs(K) | Withstand voltage (kV/mm) | Features |
|---|---|---|---|---|---|---|---|
| NPA-2 | Al2O3+TiC | 7.8 | 21 | 3~10-5 | 250 | - | Conductivity, Mirror finishing |
| NPA-03 | Al2O3 | 7.4 | 30 | >1012 | -200 | 10.9 | Low coat, Wear resistance |
| NPZ-1 | ZrO2 | 10.5 | 3 | >1012 | 300 | 8.4 | High strength, High toughness |
| NPZ-10 | ZrO2 | 10.5 | 3 | >1012 | 300 | 8.9 | High strength, High toughness |
| NPZ-2 | ZrO2+NbC | 9.4 | 4 | 3~10-5 | 300 | - | Conductivity, High strength |
| NPZ-28 | ZrO2+WC | 8.5 | 15 | 1~10-6 | 350 | - | Conductivity, High strength |
| NPZ-96 | ZrO2 | 10.8 | 3 | >1012 | -300 | 8.8 | high strength, Insulation, Color (Black) |
| NPS-1 | SiC | 4.3 | 46 | >101 | 600 | - | High hardness, High rigidity, Thermal resistance |
| NPS-5 | SiC | 4.2 | 100 | >103 | 600 | - | High hardness, High rigidity, Thermal resistance |
| NPN-3 | Si3N4 | 3.4 | 25 | >1012 | 800 | 9.4 | High strength, Thermal shock resistance |
| NPL-3 | AlN | 5 | 170 | >1012 | 400 | 10.9 | High thermal conductivity |
| NPCR-2 | Cordierite system | 1.2 | 4 | >1012 | - | 12 | Low thermal expansion, Insulation |
Values in parentheses are reference values.
Applied Product Examples of Ceramics (Incl. external data)
| Material/ Property | Anti-wear | High-strength | Iinsulation | Conductivity | Anti-heat | Anti-corrosion |
|---|---|---|---|---|---|---|
| Al2O3 NPA-5 | Nozzle, Yarn guide, Pipe liner, Transfer jig for semiconductor | Cutting tool | Conductive component | Refractory material, Heat processing container and tool, Catalyst support, | Crucible for medicine, Reaction vessel | |
| Al2O3-TiC NPA-2 | Cutting tool, Magnetic slider | Bearing, Sleeve, Belt cleaner, Sliding component | Vacuum chuck, Manufactural component for semiconductor, Heater | Cutting tool | ||
| ZrO2 NPZ-1 | Mold, Pulverizing ball, Kneader component, Manufactural component for semiconductor | Tablet mold, Die | Measurement tool, Manufactural component for semiconductor | |||
| Conductive ZrO2 NPZ-2 | Mold, Cutting blade | Die, Thin blade | ||||
| Si3N4 NPN-3 | Cutting tool, Bearing, Pulverizing ball, Nozzle, Gap separator | Squeeze roll for pipes, Gap separator, Bearing, Pulverizing component | Welding, Burner component, Temperature measuring tube, Turbo rotor, Diesel chamber, Glow plug | Bearing for medicine, Gas blowing tube, Impeller | ||
| SiC NPS-1 | Sealring, Measurement contact | Imped case | Manufactural jig for semiconductor, Heater | Gas blowing tube, Impeller | ||
| AlN NPL-2 | Bonding tool | Heat sink, Semiconductor substrate, Heat-equalization sink |
