Jinghui Industry Limited
Jinghui Industry Limited
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Specification of ceramic guides:
1. Raw material option: high purity alumina(Al2o3), zirconia(ZrO2), titania(TiO2)
2. Dimensions: min. diameter can be 2mm, max. diameter can be 50mm
3. Type of products: eyelets, bushings, friction discs, pigtails, dog tails, air nozzles and so on
4. Tolerance: general tolerance ± 1% of the dimensions, or better via a precision process
5. Surface finish: mirror surface, better than Ra0.1 at working contact surface
Main features of ceramic guides:
1. Exceptional wear resistance and hardness better than metal ones
2. Excellent mechanical strength, fracture toughness and bending strength
3. Superb thermal conductivity coefficient and thermal shock property
4. Good insulation, free of static electricity, resistant magnetic
5. Corrosion resistance in harsh working conditions
6. Excellent thermal shock resistance and good thermal stability
7. Nox-toxic, healthy material, eco-friendly material
8. Meet with RoHS, REACH regulation completely
Description of ceramic guides:
Alumina is a leading most popular technical ceramic material for ceramic yarn guides. In the application of yarn passaging, Its extraordinary hardness, wear resistance, low friction coefficient and anti-chemical performance are used fully. These outstanding characteristics greatly help the textile machinery to extend their service life, improve production efficiency and decrease the breakage of yarn, thread, and wire in the productions.
Our state of the art forming processes include hot pressing, dry pressing. The ceramic body is very dense after high-temperature cured. The main type of textile ceramic spare parts includes ceramic eyelet guides, ceramic roller, traverse guide, ceramic pigtail guide, air-jet nozzle, friction disc and so on. These textile ceramic parts can be made of the high purity of alumina, zirconia and titania ceramics.
| Property | Units | 95% alumina | 99% alumina | 99.5% alumina | Zirconia | Titania |
| Color | White, pink | White, pink, ivory | Pink, ivory, white | White, Yellow | Black, Gray, Yellow | |
| Density | g/cm3 | ≥3.60 | ≥3.80 | ≥3.85 | ≥6.0 | ≥4.0 |
| Water absorption | % | 0 | 0 | 0 | 0 | 0 |
| Hardness | HV | 1500 | 1700 | 1700 | 1300 | 800 |
| Flexural strength | Mpa | ≥320 | ≥338 | ≥379 | ≥1200 | ≥158 |
| Compressive strength | Mpa | ≥2000 | ≥2240 | ≥2240 | ≥1990 | |
| Fracture toughness | Mpa m1/2 | 3-4 | 4-5 | 4-5 | 6.5-8 | 3.2 |
| Thermal Expansion Coefficient(20-800℃) | 1×10 -6 /℃ | 5.0~8.0 | 6.2~8.0 | 6.5~8.0 | 8.0~9.5 | 8.8 |
| Thermal conductivity | W/m.k (25℃) | ≥220 | ≥200 | ≥250 | ≥300 | ≥330 |
| Max. service temperature | ℃ | 1500 | 1600 | 1675 | 1000 | 1000 |
| Insulation strength | KV/mm | 18 | 18 | 19 | 17 | 3.93 |
| Dielectric constant (1Mhz) | (E) | 9.5 | 9.5 | 9.7 | 29 | 85 |