high purity Other Adavanced Ceramics
Production Description
Glazed ceramic pipes/tubes are extremely versatile products since it is very hard, wear resistant, and chemical resistant, these products are ideal for a wide range of applications.
Product Features
95% Alumina
Alumina is a very hard and dense material, it exhibits resistance to both high temperature and corrosion with a simultaneous high mechanical strength, which is why it can be used at high temperature applications of up to 1700 掳C.
The excellent electrical insulation strength helps aluminum oxide ceramics become a leading material for high voltage applications such as gas ignition.
Almost all shapes are available. In case of dirt adhesion during use, alumina can also be glazed.
The application of aluminum oxide ceramics can be everywhere, it is the aluminum oxide that is the number one in terms of application depth and popularity, like substrates and resistor cores in the electronics industry, thread guides in wire and cable engineering, seal and regulator discs for water taps and valves, heat dissipating elements for lighting systems, protection tubes in thermal processes and catalyst carriers for the chemicals industry.
Material Properties
PropertiesUnits95% Alumina
Physical
Density, rg/cm33.5
Crystal Structure
hexagonal
Water Absorption% @R.T.0
Hardnessknoop (kg/mm2)1175
HardnessR45N78
Mechanical
Compressive StrengthMPa @ R.T.2068
Tensile StrengthMPa @ R.T.221
Modulus of ElasticityGpa303
Flexural Strength (MOR)MPa @ R.T.358
Poisson's Ratio, u
0.21
Fracture Toughness, KIcMPa x m1/24.5
Thermal
Max. Use TemperatureoC1700
Thermal Shock ResistanceDT (oC)250
Thermal ConductivityW/m-K @ R.T.25
Thermal Expansion Coefficientmm/m-潞C8.2
Specific Heatcal/g-oC @ R.T.-
Electrical
Dielectric Constant1MHz @ R.T.9
Dielectric StrengthkV/mm8.3
Electrical ResistivityWcm @ R.T.>1014
Production Technology
Isostatic pressing
Working Principle:
The powders are sealed into a flexible mold (or bag) which is in a pressure vessel. Then hydrostatic pressure will be applied to the outside of the mold, until the powders inside have bonded sufficiently to achieve a uniform density.
Advantage:
1. The best uniformity of compaction
2. The first choice for the large and high thickness item with a complex ID.
3. A short production running since no lubricant burn-off stage is required before sintering
4. The tooling cost is lower
Disadvantage:
1. Outside sharps need to be machined for almost all parts
2. It is inefficient for the high-volume production
Dry pressing
Working Principle:
The raw material is ready-made and the pressure of the forming machine is about dozens of tons to 100 tons. According to the different requests, we will use different machines to get the different green bodies. The green bodies made by dry pressing have no wax, so they can be moved to final sintering directly.
Advantage:
1. No wax, so high yield rate for the thick items.
2. Lead time is shorter than slip casting.
3. Have an option for automate production
Disadvantage:
1. Just can produce items which have a sample sharp, such as tube, bar, block
2. Much higher cost on the mold.
FAQ
Q: Are the free samples available?
A: Yes, the samples are free of charge, but the shipping cost need to be collected.
Q: How long will the offer take when you get the inquiry?
A: Generally, the quotation will be supplied within 24hours.
Q: What's the delivery time?
A: For the standard products, the shipment can be made with 7 days. For the customized products, the lead time will be 21-45 working days.
Q: How to send an inquiry?
A: An inquiry with a drawing of fully technical requirements, purchasing quantity and the material you would like will be highly appreciated.
Q: What are your terms of payment?
A: T/T in advance and Paypal in advance.high purity Other Adavanced Ceramics
website:http://www.ceagooceramic.com/other-adavanced-ceramics/
