High pressure

High pressure science and engineering is studying the effects of high pressure on materials and the design and construction of devices, such as a diamond anvil cell, which can create high pressure. By high pressure it is meant pressures of thousands (kilobars) or millions (megabars) of times atmospheric pressure (about 1 bar).

It was by applying high pressure as well as high temperature to carbon that man-made diamonds were first produced as well as many other interesting discoveries. Almost any material when subjected to high pressure will compact itself into a denser form, for example, quartz, also called silica or silicon dioxide will first adopt a denser form known as coesite, then upon application of more temperature, form stishovite. These two forms of silica were first discovered by high pressure experimenters, but then found in nature at the site of a meteor impact.

High pressure experimentation has led to the discovery of the types of minerals which are believed to exist in core of the Earth, such as perovskite which is thought to make up half of the Earth's bulk.

High pressure food preservation

High pressure isostatic presses are also being used for the treatment and preservation of food (juice, meat, seafood). The process is replacing pasteurization in high value, heat sensitive products successfully. Products treated with this method are sometimes designated as HPP (high pressure products).

ee also

Synthetic diamond

External links

* [http://www.hppi.troitsk.ru/ Institute for High Pressure Physics] Russian Academy of Sciences
* [http://to2084.narod.ru/ V.Grishin's ElectroCumulation CNF Project]

Further reading

*The New Alchemists: Breaking Through the Barriers of High Pressure, Robert M. Hazen, Times Books, Random House, 1993, hardcover, 286 pages, ISBN 0-8129-2275-1


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • high-pressure — ˈhigh ˌpressure adjective [only before a noun] 1. a high pressure job or situation is one where you need to work extremely hard; = STRESSFUL: • He helped launch the television network and then left the high pressure job after disagreements with a …   Financial and business terms

  • High-pressure — High pres sure (?; 135), a. 1. Having or involving a pressure greatly exceeding that of the atmosphere; said of steam, air, water, etc., and of steam, air, or hydraulic engines, water wheels, etc. [1913 Webster] 2. Fig.: Urgent; intense; as, a… …   The Collaborative International Dictionary of English

  • high-pressure — adj [only before noun] 1.) a high pressure job or situation is one in which you need to work very hard = ↑stressful 2.) high pressure sales/selling methods etc very direct and often successful ways of persuading people to buy something ▪ high… …   Dictionary of contemporary English

  • high-pressure — ☆ high pressure [hī′presh′ər ] adj. 1. a) having, using, or withstanding a high or relatively high pressure b) having or indicating a high barometric pressure 2. using or applying forcefully persuasive or insistent methods or arguments [high… …   English World dictionary

  • high-pressure — high′ pres′sure adj. v. sured, sur•ing 1) having or involving a pressure above the normal 2) involving a high degree of stress; demanding: a high pressure job[/ex] 3) vigorous; persistent; aggressive: high pressure salesmanship[/ex] 4) to use… …   From formal English to slang

  • high-pressure — adjective 1. ) used for describing people or situations that make you feel forced to do something or forced to succeed: a high pressure salesman/job/situation 2. ) containing a lot of force, or using a lot of pressure from air, water, or steam: a …   Usage of the words and phrases in modern English

  • high pressure — index duress Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • high-pressure — index intense Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • high-pressure — I. adjective Date: 1824 1. a. having or involving a high or comparatively high pressure especially greatly exceeding that of the atmosphere b. having a high barometric pressure 2. a. using or involving aggressive and insistent sales techniques b …   New Collegiate Dictionary

  • high-pressure — 1 adjective (only before noun) 1 a high pressure job or situation is one in which you need to work very hard; stressful 2 high pressure sales/selling methods etc very direct and often successful ways of persuading people to buy something: high… …   Longman dictionary of contemporary English


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.