Engineering:Vycor
Vycor is the brand name of Corning's high-silica, high-temperature glass. It provides very high thermal shock resistance. Vycor is approximately 96% silica and 4% boron trioxide, but unlike pure fused silica, it can be readily manufactured in a variety of shapes. Vycor can be subject to prolonged usage at 900 °C.[1]
Vycor products are made by a multi-step process. First, a relatively soft alkali-borosilicate
Vycor has an extremely low coefficient of thermal expansion, just one quarter that of Pyrex.[2] This property makes the material suitable for use in applications that demand very high dimensional stability, such as metrology instruments, and for products that need to withstand high thermal-shock loads. Vycor also has ultraviolet transmission to about 250 nm[3] and is used in some germicidal lamps. Based on a reference thickness of 1mm, Vycor glass has an approximately 90% transmission spectra from ~300 nm to 3100 nm.[4]
Vycor can also be used for removal of 231Pa and 233Pa in fuel recycling.[5]
References
- ↑ Nordberg, Martin E. (November 1944). "PROPERTIES OF SOME VYCOR-BRAND GLASSES *" (in en). Journal of the American Ceramic Society 27 (10): 299–305. doi:10.1111/j.1151-2916.1944.tb14473.x. ISSN 0002-7820. https://ceramics.onlinelibrary.wiley.com/doi/10.1111/j.1151-2916.1944.tb14473.x.
- ↑ "Properties of VYCOR Code 7913 96% Silica High Temperature Glass". Corning Glass, Inc.. http://csmedia2.corning.com/LifeSciences//media/pdf/Description_of_VYCOR_Code_7913.pdf.
- ↑ "Corning Vycor® 7913 UV-Transmitting Glass". Corning. http://www.matweb.com/search/datasheettext.aspx?matid=748.
- ↑ "VYCOR® Code 7913 Optical Transmission". https://www.pgo-online.com/intl/curves/vycor_kurve.html.
- ↑ Goode, J. H.; Moore, J. G. (1967-01-01). ADSORPTION OF PROTACTINIUM ON UNFIRED VYCOR: FINAL HOT-CELL EXPERIMENTS. (Report). Office of Scientific and Technical Information (OSTI). doi:10.2172/4347358. http://dx.doi.org/10.2172/4347358.
- Elmer, Thomas H. (1991). "Porous and Reconstructed Glasses". in Schneider, Samuel J.. Engineered Materials Handbook, Vol. 4: Ceramics and Glasses. Materials Park, OH: ASM International. pp. 427–32. ISBN 0-87170-282-7. http://www.corning.com/lightingmaterials/images/porous.pdf. Retrieved 2006-05-31.
- ornl 3830 Chemical Separation Processes for Uranium and Plutonium. 1965. https://de.scribd.com/document/50118967/ornl-3830-Chemical-Separation-Processes-for-Uranium-and-Plutonium.
External links
- Corning Inc. Manufacturer's website
- Momentive Performance Materials, Inc. Quartz and Low Softening Point Glass (LSPG) Manufacturer
- Phase separation in borosilicate and alkali earth silicate glasses
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