ASTM D2149-13

Standard Test Method for Permittivity (Dielectric Constant) And Dissipation Factor Of Solid Ceramic Dielectrics At Frequencies To 10 MHz And Temperatures To 500&#176C

SIGNIFICANCE AND USE
4.1 Permittivity and dissipation factor are sensitive to changes in chemical composition, impurities, and homogeneity. Measurement of these properties is, therefore, useful for quality control and for determining the effect of environments such as moisture, heat, or radiation.
SCOPE
1.1 This test method covers the determination of the relative permittivity (dielectric constant) and dissipation factor of solid dielectrics from 50 Hz to 10 MHz over a range of temperatures from −80 to 500°C.2 ,3 Two procedures are included as follows:  
1.1.1 Procedure A—Using Micrometer Electrode.  
1.1.2 Procedure B—Using Precision Capacitor. Note 1—In common usage the word “relative” is frequently dropped.  
1.2 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Apr-2013
• ICS: 29.035.30 - Glass and ceramic insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.12 - Electrical Tests

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2149 − 13
Standard Test Method for
Permittivity (Dielectric Constant) And Dissipation Factor Of
Solid Dielectrics At Frequencies To 10 MHz And
1
Temperatures To 500°C
This standard is issued under the fixed designation D2149; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 Thistestmethodcoversthedeterminationoftherelative 3.1 Definitions:
permittivity (dielectric constant) and dissipation factor of solid 3.1.1 Permittivity and dissipation factor are fully defined in
dielectricsfrom50Hzto10MHzoverarangeoftemperatures Terminology D1711. Briefly, the permittivity of an insulating
2,3
from−80to500°C. Twoproceduresareincludedasfollows: materialistheratioofthecapacitancebetweentwoconductors
1.1.1 Procedure A—Using Micrometer Electrode. when embedded in the material to the capacitance between the
1.1.2 Procedure B—Using Precision Capacitor. same configuration of conductors in a vacuum (or air). The
dissipation factor is the ratio of the resistive to capacitive
NOTE 1—In common usage the word “relative” is frequently dropped.
currents in the dielectric. The product of the permittivity and
1.2 This standard does not purport to address the safety
dissipation factor is the loss index.
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
4. Significance and Use
health practices and determine the applicability of regulatory
4.1 Permittivity and dissipation factor are sensitive to
limitations prior to use.
changes in chemical composition, impurities, and homogene-
ity. Measurement of these properties is, therefore, useful for
2. Referenced Documents
quality control and for determining the effect of environments
4
2.1 ASTM Standards:
such as moisture, heat, or radiation.
D150Test Methods forAC Loss Characteristics and Permit-
tivity (Dielectric Constant) of Solid Electrical Insulation
5. Apparatus
D1711Terminology Relating to Electrical Insulation
5.1 Measuring Circuits—Suitable measuring circuits are
E197Specification for Enclosures and Servicing Units for
described in Test Methods D150. For measurements from 50
Tests Above and Below Room Temperature (Withdrawn
5
Hz to 100 kHz a substitution method using a low-voltage
1981)
capacitance bridge is recommended. For measurements at 1
MHz and above, a resonant-circuit susceptance variation
1
method is recommended.The Q of the circuit has to be at least
This test method is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
200exceptforverylowlossmaterials,forwhicha Qof500or
Subcommittee D09.12 on Electrical Tests.
higher is desirable.
Current edition approved May 1, 2013. Published June 2013. Originally
approved in 1963. Last previous edition approved in 2004 as D2149–97 (2004),
5.2 Test Enclosure—Unless testing only at room
which was withdrawn in January 2013 and reinstated in May 2013. DOI:
temperature, it is necessary to adapt a Hartshorn-Ward type
10.1520/D2149-13.
2 specimen holder to a temperature-controlled test enclosure.
R. Bartnikas, Chapter 2, “Alternating-Current Loss and Permittivity
Measurements,” Engineering Dielectrics, Vol IIB, Electrical Properties of Solid
Whereapplicable,usetherequirementsforagradeAenclosure
Insulating Materials, Measurement Techniques, R. Bartnikas, Editor, ASTM STP
as in Specification E197.Asuggested arrangement is shown in
926, ASTM, Philadelphia, 1987.
Fig. 1. This arrangement provides terminal connections away
3
R. Bartnikas, Chapter 1, “Dielectric Loss in Solids,” Engineering Dielectrics,
from the temperature zone.
Vol IIA, Electrical Properties of Solid Insulating Materials: Molecular Structure and
Electrical Behavior, R. Bartnikas and R. M. Eichorn, Editors, ASTM STP 783,
5.3 Specimen Holder—The suggested arrangement shown
ASTM Philadelphia, 1983.
4
in Fig. 1 incorporates the following requirements:
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.3.1 The selection of the metals is of utmost importance.
Standards volume information, refer to the standard’s Document Summary page on
Themetalhastobeofgoodthermalandelectricalconductivity
the ASTM website.
5
and yet be oxidation resistant and have sufficient strength to
The last approved version of this historical standard is referenced on
www.astm.org. maintain its mechanical dimensions after repeated heating.
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