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The Si3N4 based ceramic have excellent proportions of low thermal expansion, high-conductivity, wear-corrosion-oxidation, thermal shack resistance. It is the best material to manufacture Si3N4 ceramic pin tube sealing the glass screen of colored TV. Our manufactured Si3N4 ceramic pin tube the glass screen of colored TV can normally work for 480h or more.
Si3N4 pin tubes,which can be used in electronic industry and color TV industry, are superior in thermal shock resistance and fracture toughness. With a steady production process, the quality and lifespan of the pin tubes have already reached advanced levels in the world.
Physical Properties
Density g/cm3 | Relative density
| Elastic modulus GPa |
Compression strength ratio25
| Hardness GPa |
3.26 0.02 | >99.5 | 300320 | 4050 | 16 - 20 |
Fracture toughness /MPam1/2 | Bending strength MPa | Poisson's ratio | Linear expansion coefficient 10-6K-1 | Webuller modulus |
6.09.0 | 9001000 | 0.25 | 3.13.3 | 1215 |
Thermal conductivity WmK-1 | Specific resistance ratio | Corrosion resistance | Size stability | Magnetic |
15~20 | 1018 | Excellent | Excellent | NO |
silicon nitride pin tube