Self-Diffusion definition of Self-Diffusion in the Free Online Encyclopedia.

self-diffusion [¦self di¦fyü·zhən]

(solid-state physics)

The spontaneous movement of an atom to a new site in a crystal of its own species.

Self-Diffusion

the special case of diffusion in a pure substance or a solution of constant composition where the substance’s own particles undergo diffusion. In self-diffusion, the atoms that participate in the diffusion movement have the same chemical properties but can differ in their physical characteristics—in the composition of their nuclei (see ISOTOPES). In the case of a difference in the isotopic composition of the substance, self-diffusion can be observed through the use of radioactive isotopes (see ISOTOPE TRACERS) or through analysis of the isotopic composition by means of mass spectrometers.

The change over time in the concentration of a given isotope in the volume of the substance under consideration is described by the usual equations for diffusion, and the rate of the process is characterized by the coefficient of self-diffusion (see DIFFUSION). When such forces as surface tension, gravity, elastic forces, or electrical forces act on a solid specimen for a long time, the diffusion displacements of the solid’s particles can result in a change in its shape or in other effects. These diffusion processes are evidenced in the joining together of two polished specimens of the same substance placed next to each other, in the sintering of powders, and in the stretching of a body under the action of a load suspended from it (diffusion creep). The study of the kinetics of these processes permits determination of the coefficient of self-diffusion of a substance.

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No references found	The self-diffusion coefficient for glycerol in the liquid state at 30[degrees]C (12) is approximately three orders of magnitude larger than the D value for TPG/glycerol diffusion in Region III (Table 2). Characterization of titanium alkoxide sol-gel systems designed for ... by Ayres, Jennifer; Simendinger, W.H.; Balik, C.M. / JCT Research It was established that f = 3 for self-diffusion and f = 6 for diffusion of large molecules in a liquid of small molecules [24]. Fluorescence quenching of phenanthrene and anthracene by maleic ... by Fang, Haixia; Mighri, Frej; Ajji, Abdellah / Polymer Engineering and Science These are Ag, Al, As, Au, B, Ba, Be, C, Ca, Cl, Co, Cr, Cu, Er, F, Fe, Ge, H, He, Hf, In, Ir, K, Mg, Mn, Mo, N, Na, Nb, Ni, O, P, Pb, Pt, Rb, Sb, Se, Si, SiH3, Sn, Ti, V, Yb, and Zn with regard to bulk diffusion; Ag, Au, Ba, Cl, Cu, Er, F, Ga, Ge, In, O, Pb, Sb, Si, SiH3, Sn, and Y with regard to surface diffusion; H with regard to grain-boundary diffusion; and self-diffusion in liquid Si. Diffusion in Silicon: A Seven-Year Retrospective by SciTech Book News	self-conscious Self-Consciousness Self-Consistent Field self-consistent field method self-contained base-line system self-contained breathing apparatus self-contained database management system Self-Contained Electrical Power Supply self-contained night attack self-contained portable electric lamp self-contained range finder self-coved self-defence self-defense Self-Defense Force self-defocusing self-destroying self-destroying fuse self-destruct charge self-destructing e-mail self-destruction self-destruction equipment self-determination self-diagnostic routine self-differentiation Self-Diffusion self-documenting code self-dual switching function self-dumping cage self-dumping car Self-Education self-employed self-energizing brake self-energy self-esteem Self-Evaluation Self-Excitation of Generators Self-Excitation of Oscillations self-excited self-excited oscillator self-excited vibration Self-Extensible Language self-extinguishing self-extracting archive self-extracting exe self-extracting file self-faced stone Self-Fertilization self-fields Self-Financing self-finished roofing felt	Self-Determination Synthesis Project Self-determination theory self-determined self-determined self-determined self-determined being Self-Determined Career Development Model self-determining self-determining self-determining Self-deternination Self-deternination Self-deternination self-development self-development self-development Self-Development Kit Self-Development of People Self-devised Self-devoted self-devotedly self-devotedness Self-devotement self-devotion Self-devouring Self-diagnosed Asperger syndrome self-diagnosis self-diagnostic routine self-differentiation self-differentiation Self-Diffusion Self-diffusive self-digestion self-directed self-directed Self-Directed Account Self-Directed Accounts Self-Directed Aggressive Behavior Self-Directed Brokerage Self-Directed Brokerage Account Self-Directed Brokerage Option Self-Directed Fitness Improvement Program self-directed imagery Self-Directed IRA Self-Directed IRA Self-Directed IRAs Self-Directed Learning Readiness Self-Directed Learning Readiness Scale Self-Directed Portfolio Self-Directed Portfolios Self-Directed Registered Retirement Savings Plan Self-Directed Registered Retirement Savings Plans Self-Directed Retirement Account Self-directed retirement plan Self-directed retirement plan Self-Directed Retirement Plans Self-Directed Retirement Savings Plan Self-Directed Risk Management

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The self-diffusion coefficient for glycerol in the liquid state at 30[degrees]C (12) is approximately three orders of magnitude larger than the D value for TPG/glycerol diffusion in Region III (Table 2).

Characterization of titanium alkoxide sol-gel systems designed for ... by Ayres, Jennifer; Simendinger, W.H.; Balik, C.M. / JCT Research

It was established that f = 3 for self-diffusion and f = 6 for diffusion of large molecules in a liquid of small molecules [24].

Fluorescence quenching of phenanthrene and anthracene by maleic ... by Fang, Haixia; Mighri, Frej; Ajji, Abdellah / Polymer Engineering and Science

These are Ag, Al, As, Au, B, Ba, Be, C, Ca, Cl, Co, Cr, Cu, Er, F, Fe, Ge, H, He, Hf, In, Ir, K, Mg, Mn, Mo, N, Na, Nb, Ni, O, P, Pb, Pt, Rb, Sb, Se, Si, SiH3, Sn, Ti, V, Yb, and Zn with regard to bulk diffusion; Ag, Au, Ba, Cl, Cu, Er, F, Ga, Ge, In, O, Pb, Sb, Si, SiH3, Sn, and Y with regard to surface diffusion; H with regard to grain-boundary diffusion; and self-diffusion in liquid Si.

Diffusion in Silicon: A Seven-Year Retrospective by SciTech Book News

self-conscious

Self-Consciousness

Self-Consistent Field

self-consistent field method

self-contained base-line system

self-contained breathing apparatus

self-contained database management system

Self-Contained Electrical Power Supply

self-contained night attack

self-contained portable electric lamp

self-contained range finder