ASTM E473-10

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E473–09 Designation:E473–10
Standard Terminology Relating to
1
Thermal Analysis and Rheology
This standard is issued under the fixed designation E473; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This terminology is a compilation of definitions of terms used in ASTM documents relating to thermal analysis and
rheology. This terminology includes only those terms for whichASTM either has standards or is contemplating some action. It is
not intended to be an all-inclusive listing of terms related to thermal analysis and rheology.
1.2 This terminology specifically supports the single-word form for terms using thermo-as a prefix, such as thermoanalytical
or thermomagnetometry, while recognizing that for some terms a two-word form can be used, such as thermal analysis. This
terminology does not support, nor does it recommend, use of the grammatically incorrect, single-word form using thermal as a
prefix, such as, thermalanalytical or thermalmagnetometry.
1.3Definitions that are similar to those published by another standards body are identified with the abbreviation of the name of
the organization: for example, ICTAC is the International Confederation for Thermal Analysis and Calorimetry.
1.4A definition is a single sentence with additional information included in notes. It is reviewed every five years, and the year
of the last review or revision is appended.
1.3 Adefinition is a single sentence with additional information included in notes. It is reviewed every five years, and the year
of the last review or revision is appended.
2. Referenced Documents
2.1ASTM Standards:
E1445Terminology Relating to Hazard Potential of Chemicals
3.Terminology
adiabatic, adj— no heat exchange with the surroundings.
calorimeter, n—apparatus for measuring quantities of absorbed or evolved heat.
combined, adj—the application of two or more techniques to different samples at the same time. (ICTAC) (1999)
controlled-rate thermal analysis,analysis (CRTA ), n—a family of techniques that monitors the temperature versus time profile
needed to maintain a chosen, fixed rate of change of a property of a substance. (ICTAC) (1999)
NOTE 1—Compared to controlled-temperature experiments, where the reaction rate tends to increase exponentially and the rate can become limited by
heat or mass transfer, CRTA experiments are more likely to involve the chemical reaction as the limiting step. This technique can also improve the
resolution of multiple reactions. For example, in controlled rate experiments, power to the furnace is controlled to ensure a fixed rate of mass loss (or
gain).
controlled-temperature program, n—the temperature history experienced by a sample during the course of a thermal analysis
experiment.
NOTE 2—In contrast to controlled-rate experiments, power to the furnace is controlled to ensure a fixed rate of temperature change for
controlled-temperature experiments.The program may include heating or cooling segments in which the temperature is changed at a fixed rate, isothermal
segments in which time becomes the explicit independent variable, or any sequence of these individual segments. If the atmosphere (or vacuum) around
the sample is changed by some external action (depending on the independent variable only—temperature or time) during the course of the experiment,
that too becomes part of the controlled-temperature program.
curve, thermal, n—the plot of a dependent parameter against an independent parameter such as temperature or time. (ICTAC)
(1999)
dielectric thermal analysis,analysis (DETA or DEA), n—a technique in which the dielectric constant (permittivity, or
capacitance) and dielectric loss (conductance) of a substance under oscillating electric field are measured as a function of
1
This terminology is under the jurisdiction of ASTM Committee E37 on Thermal Measurements and are the direct responsibility of Subcommittee E37.03 on
Nomenclature and Definitions.
Current edition approved Aug.March 1, 2009.2010. Published September 2009.April 2010. Originally approved in 1973. Last previous edition approved in 20082009 as
E473 – 089. DOI: 10.1520/E0473-109.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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E473
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E473–09 Designation:E473–10
Standard Terminology Relating to
1
Thermal Analysis and Rheology
This standard is issued under the fixed designation E473; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This terminology is a compilation of definitions of terms used in ASTM documents relating to thermal analysis and
rheology. This terminology includes only those terms for whichASTM either has standards or is contemplating some action. It is
not intended to be an all-inclusive listing of terms related to thermal analysis and rheology.
1.2 This terminology specifically supports the single-word form for terms using thermo-as a prefix, such as thermoanalytical
or thermomagnetometry, while recognizing that for some terms a two-word form can be used, such as thermal analysis. This
terminology does not support, nor does it recommend, use of the grammatically incorrect, single-word form using thermal as a
prefix, such as, thermalanalytical or thermalmagnetometry.
1.3Definitions that are similar to those published by another standards body are identified with the abbreviation of the name of
the organization: for example, ICTAC is the International Confederation for Thermal Analysis and Calorimetry.
1.4A definition is a single sentence with additional information included in notes. It is reviewed every five years, and the year
of the last review or revision is appended.
1.3 Adefinition is a single sentence with additional information included in notes. It is reviewed every five years, and the year
of the last review or revision is appended.
2. Referenced Documents
2.1ASTM Standards:
E1445Terminology Relating to Hazard Potential of Chemicals
3.Terminology
adiabatic, adj— no heat exchange with the surroundings.
calorimeter, n—apparatus for measuring quantities of absorbed or evolved heat.
combined, adj—the application of two or more techniques to different samples at the same time. (ICTAC) (1999)
controlled-rate thermal analysis,analysis (CRTA ), n—a family of techniques that monitors the temperature versus time profile
needed to maintain a chosen, fixed rate of change of a property of a substance. (ICTAC) (1999)
NOTE 1—Compared to controlled-temperature experiments, where the reaction rate tends to increase exponentially and the rate can become limited by
heat or mass transfer, CRTA experiments are more likely to involve the chemical reaction as the limiting step. This technique can also improve the
resolution of multiple reactions. For example, in controlled rate experiments, power to the furnace is controlled to ensure a fixed rate of mass loss (or
gain).
controlled-temperature program, n—the temperature history experienced by a sample during the course of a thermal analysis
experiment.
NOTE 2—In contrast to controlled-rate experiments, power to the furnace is controlled to ensure a fixed rate of temperature change for
controlled-temperature experiments.The program may include heating or cooling segments in which the temperature is changed at a fixed rate, isothermal
segments in which time becomes the explicit independent variable, or any sequence of these individual segments. If the atmosphere (or vacuum) around
the sample is changed by some external action (depending on the independent variable only—temperature or time) during the course of the experiment,
that too becomes part of the controlled-temperature program.
curve, thermal, n—the plot of a dependent parameter against an independent parameter such as temperature or time. (ICTAC)
(1999)
dielectric thermal analysis,analysis (DETA or DEA), n—a technique in which the dielectric constant (permittivity, or
capacitance) and dielectric loss (conductance) of a substance under oscillating electric field are measured as a function of
1
This terminology is under the jurisdiction of ASTM Committee E37 on Thermal Measurements and are the direct responsibility of Subcommittee E37.03 on
Nomenclature and Definitions.
Current edition approved Aug.March 1, 2009.2010. Published September 2009.April 2010. Originally approved in 1973. Last previous edition approved in 20082009 as
E473 – 089. DOI: 10.1520/E0473-109.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E473
...