High precision Aluminum Oxide Ceramic Eyelets Weaving Spare Parts
High-precision and High Polish Textile Ceramic Eyelets Weaving Spare Parts
The ceramic eyelet(ceramic ring) is the most commonly used component for the wire passing, and it is used in the wire passing position of the coil winding machine and the textile machinery. Normally it is used for less demanding occasions. The shape, finish and the hardness of materials must be improved in order to reduce
the friction because of the wire sliding in the surface of the ceramic rings. According to the requirements, the polish degree of porcelain eye can be regarded as roughness polishing, precision polishing and ultra-precision polishing.
| Property | Units | ||||
| Al2O3 Content | % | 96 | 98 | 99.5 | 99.7 |
| Density | g / cm3 | 3.70 | 3.80 | 3.90 | 3.92 |
| Color | - | White | White | Ivory | Ivory |
| Compressive Strength @ 25 C | Mpa | 2229 | 2091 | 2512 | 2350 |
| Tensile Strength @ 25 C | MPa | 200 | 200 | 248 | 252 |
| Flexural Strength @ 25 C | MPa | 331 | 276 | 324 | 320 |
| Elastic Modulus @ 25 C | GPa | 290 | 331 | 366 | 380 |
| Hardness : Knoop Rockwell | (Gpa) Kg/mm2 R45N |
(11.7) 1196 79 |
(12.5) 1276 77 |
(14) 1428 85 |
(15) 1510 90 |
| Thermal Conductivity @ 25 C | W / m-Deg K | 20.8 | 28.1 |
30.7 |
31.6 |
| Coefficient of Thermal Expansion @ 25-1000 C | 1 X 10-6 / Deg C |
7.9 | 8.5 | 8.1 | 8.0 |
| Specific Heat @ 25 C | cal / g / Deg C | .184 | .184 | .182 | .180 |
| Maximum Working Temp. | Deg C | 1650 | 1650 | 1700 | 1700 |
| VolumeResitivity @25C @700 C | ohm-cm ohm-cm |
1 X 10-13 1 X 10-8 |
1X 10-13 2.2 X 10-9 |
1 X 10-13 6 x 10-7 |
1 X 10-13 6 x 10-7 |
| Dielectric Strength (@Thickness) 100Mils |
ac volts per mil |
350 | 340 |
335 | 330 |
| Dielectric Constant 1Mhz @25C |
e' / eo | 8.6 | 9.4 | 9.7 | 10.0 |
| Dissipation Factor 1 Mhz @25C |
Tan Delta | .0004 |
.0003 |
.0003 |
.0002 |
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