Polishing Surface Yarn Ceramic Alumina Eyelet Guide TO Textile Machine
1. Description
Alumina ceramic GUIDE is produced by alumina as the main material, through the forming, high temperature sintering .
has good heat resistance, high performance, good compression wear-resisting performance , high insulating strength, high mechanical strength, thermal expansion coefficient little etc
Widely used in electronics, electrical equipment, instrument and apparatus, household appliances, electric vacuum device, communication equipment, temperature control switch, high-grade ceramic valve, faucet move sliding-vane, and other industries for precision components use and in the media with grinding and polishing
1.Good Electrical Insulation,
2.Max. working temperature: 1300--1800 C
3.Design and make according to the customer's need
4.Chemically inert, anti-acid, anti-alkaline,Superior reliability and durability
Properties:
1.High Mechanical Strength
2.High Thermal Conductivity
3.High Spalling Resistance
4.High Softening Temperature
5.Excellent Insulativity
6.Etching Resistance
We can also design upon the customers' detailed requirements.
2.Material Parameters
| Performance For Industrial Ceramic | ||||||
| Item | Unit |
90 Al2O3 |
95 Al2O3 | 99.7 Al2O3 | ||
| Physical Characteristics | Heat resistance | 0C | 1500 | 1550 | 1800 | |
| Bulk density | g/cm3 | 3.6 | 3.6 | 3.9 | ||
| Water absorption | % | 0 | 0 | 0 | ||
Mechanical Characteristics |
Flexural strength | Mpa | 320 | 340 | 360 | |
| Hardness vickers | Gpa | 12.2 | 13.5 | 15.6 | ||
| Elastic modulus | Gpa | 280 | 320 | 370 | ||
| Poisson’s ratio | 0.22 | 0.23 | 0.23 | |||
| Thermal Characteristics | Linear expansion coefficient | (20-5000C) 10-6/0C | 7.1 | 7.2 | 8 | |
| Thermal conductivity | w/(m.k) | 16 | 24 | 32 | ||
| Specific Heat | *10-3J/(kg*K) | 0.78 | 0.78 | 0.9 | ||
|
Electrical Characteristics |
Dielectric constant (1MHZ) | - | 9 | 9.4 | 9.9 | |
| Dielectric loss angle | *10-4 | 15 | 5 | 1 | ||
| Dielectric strength | *106V/m | 12 | 15 | 15 | ||
| Processing technology | ||||||
| Process range (mm) | ||||||
| Outside Diameter | 1---300 | |||||
| Inside Diameter | 0.5---300 | |||||
| Length | 0.5---1200 | |||||
| Accuracy of working (mm) | ||||||
| Perpendicularity | 0.01 | |||||
| Concentricity | 0.01 | |||||
| Roundness | 0.005 | |||||
| Straightness | 0.005 | |||||
| Parallelism | 0.01 | |||||
| Planeness | 0.005 | |||||
| Roughness | 0.05 | |||||
| Fit clearance | 0.005 | |||||
We can supply the products according to customer's drawings, samples and performance requirement.
3.Features
1) A variety of specifications available.
2) Satisfy various technical request
3) Lower medium spoilage
4) Good insulation performance and high temperature resistance
5) Stiffness texture
6) Used in all electric products, electric heating products and wear resistant machinery parts.
Product Performance
--High thermal conductivity
--High flexural strength
--High temperature
--Good electrical insulation
--Low dielectric constant and loss
Forming Methods Includes
Drying pressing
Isostatic pressing
Hot pressing casting
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