Vycor is a glass with high temperature and thermal shock resistance, made by Corning Incorporated. Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature Thermal shock is the name given to cracking as a result of rapid temperature change Corning Incorporated ( is an American manufacturer of Glass, Ceramics and related materials primarily for industrial and scientific applications Vycor is 96% silica, but unlike pure fused silica it can be readily manufactured in a variety of shapes. The Chemical compound silicon dioxide, also known as silica or silox (from the Latin " Silex " is an Oxide Fused quartz and fused silica are types of Glass containing primarily Silica in amorphous (non- Crystalline form
Vycor products are made by a multi-step process. First, a relatively soft alkali-borosilicate glass is melted and formed by typical glassworking techniques into the desired shape. This is heat-treated, which causes the material to separate into two intermingled "phases" with distinct chemical compositions. One phase is rich in alkali and boric oxide, and can be easily dissolved in acid. In Computer science, ACID ( Atomicity Consistency Isolation Durability) is a set of properties that guarantee that Database transactions are The other phase is mostly silica, which is insoluble. Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. The glass object is then soaked in a hot acid solution, which leaches away the soluble glass phase, leaving an object which is mostly silica. At this stage, the glass is porous. Finally, the object is heated to more than 1200°C, which consolidates the porous structure, making the object shrink slightly and become non-porous. The finished material is classified as a "reconstructed glass".
For some applications the final step is skipped, leaving the glass porous. Such glass has a high affinity for water, and makes an excellent getter for water vapour. Getters are reactive materials used for removing traces of gas from vacuum systems It is widely used in science and engineering.
Immersing the porous glass in certain chemical solutions before the final consolidation step produces a colored glass that can withstand high temperatures without degrading. This is used for colored glass filters for various applications. An optical filter is a device which selectively transmits light having certain properties (often a particular range of Wavelengths that is range of Colours
References
- Elmer, Thomas H. (1991). "Porous and Reconstructed Glasses", in Schneider, Samuel J. (ed. ): Engineered Materials Handbook, Vol. 4: Ceramics and Glasses. Materials Park, OH: ASM International, pp. 427-32. ISBN 0-87170-282-7. Retrieved on 2006-05-31. Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. Events 1279 BC - Rameses II (The Great (19th dynasty becomes pharaoh of Ancient Egypt.
External links
- Corning Inc. Manufacturer's website
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic