BORON CARBIDE (B4C) DENTAL NOZZLES
Through intensive market development, ESK has developed an extensive range of dental and fine jet nozzles that meet the toughest industrial conditions.
Applications and Product Range
Under the brand name TETRABOR® dental and blast nozzles from a custom-developed boron carbide material. These TETRABOR® boron carbide nozzles are top-quality products. With our unique injection molding process, we are your specialist for micro blast nozzles in areas such as cleaning and modeling of, e.g., denture constructions, matting or engraving of glass or lapping of machine parts.
ESK supplies dental nozzles with an internal diameter of 0.6 to 1.8 mm. On request, we will develop individual solutions to our customers’ specifications.
| Boron Carbide | |||
| Material properties | Norm | Symbol/Unit | TETRABOR® |
| Density | DIN EN 623-2 | ρ [g/cm3] | >2.48 |
| Porosity | DIN EN 623-2 | P [%] | <0.5 |
| Mean grain size | [μm] | <10 | |
| Phase composition | B4C, C | ||
| Vickers hardness | DIN EN 843-4 | HV 1 [GPa] | 26 |
| Knoop hardness | DIN EN 843-4 | HK 0.1 [GPa] | 27 |
| Young's modulus | DIN EN 843-2 | E [GPa] | 410 |
| Weibull modulus | DIN EN 843-5 | m | 15 |
| Flexural strength, 4-pt bending | DIN EN 843-1 | σB [MPa] | 460 |
| Compressive strength | DIN 51104 | σD [MPa] | >2800 |
| Poisson ratio | DIN EN 843-2 | ν | 0.18 |
| Fracture toughness (SENB) | Klc [MPa·m0,5] | 5 | |
| Coefficient of thermal expansion | DIN EN 821-1 | ||
| 25°C - 500°C | α [10-6/K] | 4.5 | |
| 500°C - 1000°C | α [10-6/K] | 6.3 | |
| Specific heat at 25°C | DIN EN 821-3 | cp [J/g K] | 0.94 |
| Thermal conductivity at 25°C | DIN EN 821-2 | λ [W/m K] | 36 |
| Thermal stress parameters | calculated | ||
| R1 = σB·(1-ν) / (α·E) | [K] | 204 | |
| R2 = R1·λ | [W/mm] | 7 | |
| Specific electrical resistance at 25°C |
DIN EN 50359 | ρ [Ω cm] | 1 |
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