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95% Pure Alumina Ceramic Parts Slotted Eyelet Guide For Textile Machinery
Textile Ceramic eyelet guides (Alumina ceramic eyelet ) apply to the coiling machine and spinning and weaving machinery, is in common use fault silk another piece , is used to demand no high fault silk occasion. Silk thread slides when the job, in china eye outside, for reducing friction, must raise material hardness , smoothness and form. Our company selects and uses 99%'s Al2O3 , hardness greater than HRa88 , density 3.85, surpasses essence throwing Ra0.2.
The cramic eyelet is used to set less (friction is also less) location of pressure right. For cost reduction , according to using a request, smoothness polishing handicraft is allotted being (0.8 throw Ra) roughly , is throw (Ra accurate 0.4), surpasses essence throwing (Ra0.2). Be that single face is super-accurate at the same time mark throw and two-sided super-accurate throw. Specification of china eye many, select and use specification listing in common use in sopport a customer the day afer tomorrow now, also may demand making to order according to the customer.
2.Benefits and advantages:
1.Good insulation
2. High purity aluminum
3.Low wear lose
4. Good corrosion resistance
5. High mechanical strength
6. High density and hardness
7. Long service life
8. smooth surface
Item | Unit | 95% Al2O3 | 99% Al2O3 | 99.7% Al2O3 | ZTA |
% Al2O3 | % | 95 | 99 | 99.7 | 70 |
Density | g/cm³ | 3.6 | 3.89 | 3.9 | 4.3 |
Porosity | % | 0 | 0 | 0 | 0 |
Firing Temp | °C | 1680 | 1700 | 1800 | 1600 |
Hardness | HV | 1500 | 1600 | 1700 | 2000 |
Flexural Strength | Kgf/cm² | 3000 | 3500 | 3500 | 4500 |
Compressive Strength | Kgf/cm² | 25000 | 30000 | 30000 | 45000 |
Fracture Toughness | MPa/m | 3~4 | 3.8 | 4 | 5~6 |
Max Operating Temp | °C | 1450 | 1600 | 1700 | 1500 |
Coefficient | cm/cm/°C | 8 | 5.6 | 8 | 8 |
Thermal Expansion | (RT to 700°C) | ||||
Thermal Conductivity | W/m°K | 22 | 25 | 27 | 2.7 |
Volume Resistivity | 20°C (ohm - cm) | 1012 | 1012 | 1012 | 1012 |
100°C (ohm - cm) | 1012~1013 | 1012~1013 | 1012~1013 | 1012~1013 | |
300°C (ohm - cm) | 1010 | 1012 | 1012 | 1010 | |
Dielectric Strength | Volts/mil | 210 | 216 | 220 | 210 |
3.Application:
1.Textile machinery
2.Twisting machinery
3.Knitting machinery
4.Weaving machinery
5.Electronic wire feeder
6.Spinning machinery
7.Electronic cutters
8.Air jet mill