What effect does add 0-0.2mm tabular alumina in ceramic resistors?
The main functions include improving high temperature stability, enhancing mechanical strength, improving insulation performance and extending service life.
Improved High-Temperature Stability
Tabular alumina has a high melting point (typically ≥1800°C), maintaining material stability in high-temperature environments and preventing structural changes caused by thermal expansion or contraction.
Enhanced Mechanical Strength
Its dense crystal structure and high hardness (Mohs hardness 9) significantly enhance the compressive and flexural strength of resistor components, extending their service life.
Improved Insulation Performance
Tabular corundum has a low dielectric constant (approximately 8-10) and high resistivity (10⁰-10⁰Ω·m), effectively reducing electromagnetic interference and improving the insulation performance of resistor components.
Extended Service Life
Its strong corrosion resistance protects against acid and alkali attack, reducing material degradation caused by environmental factors.
| Style | Chemical Index | Physical Index | |||||
| Al2O3% | SiO2% | Fe2O3% | Na2O% | Volume density (g/cm3) | water absorption | apparent porosity | |
| 0-1mm 0-0.2mm | 99.2min | 0.1max | 0.1max | 0.4max | 3.5 | 1.5 | 5max |
| 200#-0 320#-0 325# | 99.1min | 0.1max | 0.1max | 0.4max | 3.5 | 1.5 | 5max |
