sublimation


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

sublimation,

in psychology: see defense mechanismdefense mechanism,
in psychoanalysis, any of a variety of unconscious personality reactions which the ego uses to protect the conscious mind from threatening feelings and perceptions.
..... Click the link for more information.
; psychoanalysispsychoanalysis,
name given by Sigmund Freud to a system of interpretation and therapeutic treatment of psychological disorders. Psychoanalysis began after Freud studied (1885–86) with the French neurologist J. M.
..... Click the link for more information.
.

sublimation

(sŭblĭmā`shən), change of a solid substance directly to a vapor without first passing through the liquid state. The term is also used to describe the reverse process of the gas changing directly to the solid again upon cooling. An example of sublimation is seen when iodine, on being heated, changes from a dark solid to a purplish vapor that condenses directly to a crystalline solid upon striking a cool surface. In this way pure crystals of iodine are prepared. Some other substances, e.g., mercuric chloride, can be prepared by sublimation. Solid carbon dioxide, commonly known as dry ice, sublimes at −78.5°C; (−109.3°F;). Sublimation also occurs when air saturated with water vapor is suddenly cooled below the freezing point of water. Frost and snowflakes are thus formed by water changing directly from the gaseous to the solid state.

sublimation

see DEFENCE MECHANISMS.

Sublimation

 

the transition of a substance from the crystalline state directly into the gaseous state without melting; it occurs with the absorption of heat (first-order phase transition).

Sublimation is a type of vaporization and is possible over the entire range of temperatures and pressures at which the solid and gaseous phases coexist. The energy required for sublimation is called the heat of sublimation, or latent heat of sublimation. The relationship between the heat of sublimation, the saturation vapor pressure above the solid, and the temperature under equilibrium conditions is given by the Clausius-Clapeyron equation. Sublimation of metal crystals leads to the formation of mon-atomic vapors. Ionic crystals, upon evaporation, often form polar molecules in the gaseous phase. Molecular crystals form vapors consisting of molecules.

The main kinetic characteristic of sublimation is the rate of sublimation, which is the mass of a substance that sublimes per unit time. The dependence of the limiting rate of sublimation of substances on the temperature and the properties of the gaseous phase is the basis for selection of materials for heat-shielding of spacecraft. Sublimation with the subsequent growth of pure crystals in a gaseous medium is widely used for the purification of solids.


Sublimation

 

in psychology, the psychological process by which the energy of affective drives is transformed and transferred to goals of social action and cultural creativity. The concept of sublimation was introduced by S. Freud in 1900. In Freudian psychoanalysis, sublimation is viewed as one form of transformation of a drive—such as the libido—and as the opposite of repression. In social psychology, sublimation is associated with the processes of socialization. The problems of sublimation are a subject of special study in such areas as child psychology, sports psychology, and the psychology of creativity.

sublimation

[‚səb·lə′mā·shən]
(psychology)
A defense mechanism whereby the energies of undesirable instinctual cravings and impulses are converted into socially acceptable activities.
(thermodynamics)
The process by which solids are transformed directly to the vapor state or vice versa without passing through the liquid phase.
References in periodicals archive ?
Photo USA will be displaying new products including sublimation pillowcases, the environmentally friendly Eco-Traveler, iPad Retina Cases, as well as the new iPhone 6 cases.
The factors can be evaluated using assessment criteria based on informational relevance, as well as on the new conception defining for " intelligence sublimation through wisdom", in which [RG.
During the progress in sublimation single particles will become separated, but the continuous mixing of the material will induce the formation of weak agglomerates.
In the interest of minimizing risk and the possibility of profitless activity, manual labor is separated from intellectual labor, a conceptual operation based on the analogy that compares social processes to the chemical process of sublimation.
Rogers, Arkansas, opted for dye sublimation to replace the dip process for a camouflage decoration on the stock and forearm of one of its lines of air rifles.
of Houston requested a base-ball uniform design using sublimation, giving it the appearance of a faded color jersey.
By mixing amorphous carbon with cubane, study coauthor Tarter Yildirim of NIST found that he could effectively suppress the sublimation long enough to collect the data needed to obtain the crystal structure.
For sublimated graphics, VersaArt printers require the addition of Roland's BU-2 high capacity ink system and SBL2 sublimation inks.
Marrying fashion and technology, the Epson "Digital Couture" event will feature 11 designers' collections created using Epson's state-of-the-art dye sublimation printing and will demonstrate the design freedom and capabilities of the technology for the fashion industry.
com)-- Digital Sign Technologies is launching new dye sublimation inks on their new domain www.
and Kiian Group of Italy have signed a new long term license agreement to sell digital inks for sublimation imaging.
Nazdar has introduced the new Lyson TX6500 Series digital water-based dye sublimation inks formulated for use in Mimaki, Mutoh, Roland and Epson digital printers.