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The measurement of changes in the volume of a liquid or dimensions of a solid which occur in phenomena such as allotropic transformations, thermal expansion, compression, creep, or magnetostriction.



a branch of physics that studies the dependence of the dimensional changes of bodies on external conditions, such as temperature, pressure, electric and magnetic fields, and ionizing radiation. Basically, dilatometry deals with the thermal expansion of bodies and its various anomalies (occurring, for example, during phase transitions). Instruments used in dilatometry are called dilatometers. Dilatometric methods are widely used in physics to study the properties of substances as well as in the study of materials.

References in periodicals archive ?
t] Dilatometry JMatPro [[degrees]C] [[degrees]C] [Ar.
The same type of curve would have been generated in the dilatometry experiment, had the coefficient of thermal expansion been plotted against temperature.
Topics covered include Differential Scanning Calorimetry and Differential Thermal Analysis (DSC/DTA), Thermogravimetry, Thermomechanical Analysis and Dilatometry, Dynamic Mechanical Analysis, Micro-Thermal Analysis, Hot Stage Microscopy, and Instrumentation.
Traditionally, the solid fat index was calculated using dilatometry but this is an awkward technique, and the results can be imprecise and subjective.
Another means of examining fundamental thermodynamic phenomena is the use of high-pressure dilatometry to measure the pressure-volume-temperature dependence of polymers.
In addition, pressure dilatometry measurements were used to calculate the equation of state parameters for the polybutadienes.
Comparison of turbidity and dilatometry data (47), (49) has shown that the relative volume crystallinity detectable by turbidity is well below 0.
The results of thermal analysis, dilatometry, birefringence, sonic measurements and x-ray scattering are given in table 2.
Determination of residual stresses arising from volumetric shrinkage of epoxy and unsaturated polyester resins has been extensively reported using methods such as dilatometry (6-8), torsional parallel plate rheometry (9), dynamic mechanical analysis [10], bending beam [11, 12], and changes in buoyancy of the resin (2), (5), (13), (14).
The hybrids were further characterized by scanning electron microscopy (SEM), FTIR, dilatometry, and thermogravimetric analysis (TGA).
For subsequent analyses including dilatometry tests, different types of specimens were obtained by compaction of the raw powders following to two different routes.
The analysis of SEM results, as well as of the measurements of density, moisture content, dilatometry, and mechanical tests gives us grounds to assume that for the used [epsilon] values, the structure rearrangements occur in the amorphous phase under ED and in the crystalline phase under ECMAE.