No.: 269
You are buying on a 1.800" Diameter x 0.770" Thick High Purity Alumina Ceramic Disk Puck Setter. They are in mint condition being NOS (New Old Stock). They are made from 98% purity Aluminum Oxide (Al2O3) which of course is Alumina, a very robust and durable material.
This material has very high hardness, very high stiffness, very good corrosion resistance to chemicals at high temperature, and very high refractoriness or use temperature. They may be used for a variety of electrical, mechanical, and thermal applications. They may be used as setter plates for firing parts in a kiln. The may be used for high temperature furnaces and as high temperature refractory turntables. They may also be used for jewelry or for applications requiring high wear or abrasion resistance. Your imagination is the only limiting factor in the spectrum of possible applications for this component. Be sure to view all photos as they are an integral component of the item description.
The specifications for these components are as follows:
Diameter: 1.800” (45.7 mm) +/- 0.010"
Thickness: 0.770” (19.6 mm) +/- 0.005"
Please Note: These are precision technical ceramic components. There is no warp or camber for this item. They are flat. The thermal shock resistance is not very high so exercise rule of thumb caution. “The larger the piece of material the slower the rate of temperature increase should be applied to the piece.” Heat up slowly to avoid cracking in use.
Specific Gravity or Density: 3.9 g/cm3
Water Absorption or Porosity: 0%
Fusion Temperature or Melting Temperature: 2000 °C or 3632 °F
Maximum Working Temperature: 1700 °C or 3162 °F
Thermal Conductivity: 25 W/m* K
Specific Heat: 0.9 J/g*K
Expansion Coefficient or CTE: 7.5 x 10 E-6 inches/°C
Electrical Resistivity at 20 C: 10 E14 Ohm*cm
Electrical resistance at 600 C: 10 E8 Ohm*cm
Modulus of Elasticity: 44 x 10 E6 p.s.i. or 350 GPa.
CAUTION: Edges may be sharp!
These components were not specifically manufactured for an individual application; therefore be sure to check the dimensional descriptions carefully for your application. Future returns or requests for refunds, because of some "fit" issue or the like will not be honored. Please check the other Alumina component variants that are available in my listings for the sizes that best fits your requirement. Your imagination is the only limiting factor in the spectrum of possible applications for these components and materials.
If you require additional technical information, design, or application engineering consultation, feel free to contact us. As a materials scientist with four decades experience in high temperature processing, ceramics, dentistry, and jewelry manufacture it will be possible to provide you with knowledgeable, creative and imaginative approaches to your requirements.
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No.: 269