Abrasive High Wearing Technical Alumina Textile Ceramic Guide Red / White
Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance,but relatively low strength and fracture toughness.Alumina ceramic is generally white but may also be pink or ivory.The color is derived from either the sintering additives or impurities in the raw materials.
The choice of Ceramic Eyelet for textile machinery has always been a critical part of cost effective fiber processing.With todays’ extremely fast production speeds, synthetic fibers and abrasive high-wearing technical yarns have led to ever-higher demands on ceramic guides.
Other information:
| Feature | Application | Main usage |
| 1.Great mechanical strength |
Electric appliance industry Automotive industry |
1.Heat treatment furnace and toughened furnace |
| 2.High softening temperature | ||
| 3.Good resistance to thermal impact | ||
| 4.Small thermal expansion coefficient |
Mechanical industry Engineer industry |
2.Inner liner tube and heating tube in electric furnace |
| 5.Good chill and abrupt heat properties | ||
| 6. Resistance to acid and alkali corrosion |
| Properties | Units | Alumina(Al2O3) | ||||||
| Porous | Mullite | Al2O3 92% |
Al2O3 96% |
Al2O3 99% | Al2O3 99.5% | |||
| Al2O3 | ||||||||
| Mechanical | Density | g/cm3 | 2.8 | 3.6 | 3.7 | 3.9 | 3.9 | |
| Color | —— | —— | Tan | White | White | Ivory | Ivory | |
| Water Absorption | % | 0 | 0 | 0 | 0 | 0 | ||
| Vickers Hardness | Gpa | —— | 7.4 | 11 | 11.5 | 13 | 14 | |
| Flexural Strength (20°C) | Mpa | 50~100 | 170 | 345 | 358 | 380 | 380 | |
| Compressive Strength (20°C) | Mpa | 20~100 | 550 | 2200 | 2300 | 3000 | 3000 | |
| Thermal | Thermal Conductivity (20°C) | W/m.K | 3.1 | 3.5 | 16.7 | 24.8 | 25~35 | 25~35 |
| Thermal Shock Resistance (20°C) | ΔT(C) | —— | 300 | 250 | 250 | 200 | 200 | |
| Maximum Use Temperature | °C | 1900 | 1700 | 1500 | 1600 | 1700 | 1700 | |
| Electrical | Volume Resistivity (25°C) | Ω.cm | —— | >1014 | >1014 | >1014 | >1014 | >1014 |
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