Ceramic Mechanical Seal
Ceramic material refers to inorganic non-metallic materials made of natural or synthetic compounds through forming and sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. It is widely used in machinery, chemical industry, petroleum, pharmaceutical, automobile and other fields. Because of its advantages, it has become Sealcon's great choice for sealing materials.
Mechanical characteristic
Ceramic material is the material with the best rigidity and highest hardness in engineering materials, and its hardness is mostly above 1500HV. Ceramics have high compressive strength, but low tensile strength, poor plasticity and toughness.
Thermal characteristic
Ceramic materials generally have high melting point (mostly above 2000), and have excellent chemical stability at high temperature. The thermal conductivity of ceramics is lower than that of metal materials. At the same time, the linear expansion coefficient of ceramics is lower than that of metal. When temperature changes, ceramics have good dimensional stability.
Electrical characteristic
Most ceramics have good electrical insulation, so a large amount of insulation is used to make all kinds of voltages (1kV~110kV). Ferroelectric ceramics barium titanate (BaTiO3) has high dielectric constant which can be used in the production of capacitor, ferroelectric ceramics. A few ceramics also have the characteristic of semiconductor, can be a rectifier.
Chemical characteristic
Ceramic material is not easy to be oxidized at high temperature, and has good corrosion resistance to acid, alkali and salt.
Optical characteristic
Ceramic materials also have unique optical properties, which can be used as solid laser materials, optical fiber materials, optical storage containers, etc. Transparent ceramics can be used in high-pressure sodium lamp tubes.Magnetic ceramics (ferrites such as MgFe2O4, CuFe2O4, Fe3O4) have a wide range of applications in recording tapes, records, transformer cores, and large computer memory components.
Mechanical seals has the high demands about sealing materials, so the ceramic is choosed to make ceramic seals for water pumps because of its competitive features.
ceramic physical property |
||||
Technical parameter |
unit |
95%Al2O3 |
99%Al2O3 |
99.5%Al2O3 |
content of Al2O3 |
% |
95 |
99 |
99.5 |
density |
g/cm3 |
3.7 |
3.88 |
3.9 |
hardness |
HRA |
85 |
88 |
90 |
porosity rate |
% |
0.4 |
0.2 |
0.15 |
fractural strength |
MPa |
250 |
310 |
350 |
coefficient of heat expansion |
10(-6)/K |
5.5 |
5.3 |
5.2 |
thermal conductivity |
W/M.K |
27.8 |
26.7 |
26 |
Tag: Mechanical Seals
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Esta página es acerca de los importadores y exportadores de Ceramic Mechanical Seal Buscar en la categoria : Bienes de equipo Buscar en la categoria : ceramic, mechanical, seal |
Jueves 11 enero 2007
we are manufacturere of all kind of railway track fittings and fastners. we also produce other high tension fasteners and supply them glopbally. we are also regularly supplying electrical overhead line hardwares. We can produce them as per buyer drawing and specification.Ubicación ...
Drastic forging (p) ltd
- dkjain
- - Kolkata
- 00913322314498
- 00919433001602
Viernes 13 junio 2008
Cantidad : As per dem - Precio : Negotiable
We have vast arrangement and well experienced team of workers for Leather Garmrnts-Fashion, Motor Bike Jacket,Pants, Skirts etc. High quality leather garments as per requirements of Clients. If some one wants us to develop his design,do send us design and we will feel pleasure to...
Sayor Int'l.
- sayor
- 51310 - Sialkot
- +92 5 23 61 05 15
- 0092 321 7101608
Viernes 23 marzo 2007
Cantidad : 20000 - Precio : competitive
We are a high tech manufacture focusing on the optic transceivers our productline cover all kind of SFP/GBIC/XFP/BiDi, which are completely CISCO,3COM,HP,IBM,compatible,Ubicación : , HongKong, Persona a contactar : Dick Yi,
GCL enterprise. Co Ltd
- meichu
- - HongKong