ASTM D2442-75(2001)
(Specification)Standard Specification for Alumina Ceramics for Electrical and Electronic Applications
Standard Specification for Alumina Ceramics for Electrical and Electronic Applications
SCOPE
1.1 This specification covers the requirements for fabricated alumina parts suitable for electronic and electrical applications and ceramic-to-metal seals as used in electron devices. This standard specifies limits and methods of test for electrical, mechanical, thermal, and general properties of the bodies used for these fabricated parts, regardless of part geometry.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: D 2442 – 75 (Reapproved 2001)
Standard Specification for
Alumina Ceramics for Electrical and Electronic
1
Applications
This standard is issued under the fixed designation D2442; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope mittivity (Dielectric Constant) of Solid Electrical Insula-
5
tion
1.1 Thisspecificationcoverstherequirementsforfabricated
D257 Test Methods for DC Resistance or Conductance of
alumina parts suitable for electronic and electrical applications
5
Insulating Materials
and ceramic-to-metal seals as used in electron devices. This
6
D618 Practice for Conditioning Plastics for Testing
standard specifies limits and methods of test for electrical,
5
D1711 Terminology Relating to Electrical Insulation
mechanical, thermal, and general properties of the bodies used
D1829 Test Method for Electrical Resistance of Ceramic
for these fabricated parts, regardless of part geometry.
5
Materials at Elevated Temperatures
1.2 The values stated in SI units are to be regarded as the
D2149 Test Method for Permittivity (Dielectric Constant)
standard. The values given in parentheses are for information
and Dissipation Factor of Solid Ceramic Dielectrics at
only.
5
Frequencies to 10 MHz and Temperatures to 500°C
2. Referenced Documents D2520 Test Method for Complex Permittivity (Dielectric
Constant) of Solid Electrical Insulating Materials at Mi-
2.1 ASTM Standards:
7
crowave Frequencies and Temperatures to 1650°C
C20 Test Methods for Apparent Porosity, Water Absorp-
E6 Terminology Relating to Methods of Mechanical Test-
tion, Apparent Specific Gravity, and Bulk Density of
8
2
ing
Burned Refractory Brick and Shapes by Boiling Water
2
E12 Terminology Relating to Density and Specific Gravity
C108 Symbols for Heat Transmission
9
of Solids, Liquids, and Gases
C242 Terminology of Ceramic Whitewares and Related
3
E122 Practice for Calculating Sample Size to Estimate,
Products
with a Specified Tolerable Error, the Average for a Char-
C408 Test Method forThermal Conductivity ofWhiteware
10
3
acteristic of a Lot or Process
Ceramics
11
E165 Practice for Liquid Penetrant Inspection Method
C573 Methods for Chemical Analysis of Fireclay and
4
E228 Test Method for Linear Thermal Expansion of Solid
High-Alumina Refractories
10
Materials with a Vitreous Silica Dilatometer
C623 Test Method for Young’s Modulus, Shear Modulus,
F19 Test Method for Tension and Vacuum Testing Metal-
and Poisson’s Ratio for Glass and Glass-Ceramics by
12
3
ized Ceramic Seals
Resonance
F77 Test Method for Apparent Density of Ceramics for
D116 Methods of Testing Vitrified Ceramic Materials for
3
5
Electron Device and Semiconductor Application
Electrical Applications
F109 Terminology Relating to Surface Imperfections on
D149 Test Methods for Dielectric Breakdown Voltage and
3
Ceramics
Dielectric Strength of Electrical Insulating Materials at
5
F134 Test Methods for Determining Hermeticity of Elec-
Commercial Power Frequencies
tron Devices with a Helium Mass Spectrometer Leak
D150 Test Methods for AC Loss Characteristics and Per-
12
Detector
F417 Test Method for Flexural Strength (Modulus of Rup-
3
ture) of Electronic-Grade Ceramics
1
This specification is under the jurisdiction of Committee C-21 on Ceramic
2.2 Other Standards:
Whitewares and Related Products and is the direct responsibility of Subcommittee
C21.03 on Fundamental Properties.
This specification also includes material and suggestions provided by ASTM
6
Committee D-9 on Electrical and Electronic Insulating Materials. Annual Book of ASTM Standards, Vol 08.01.
7
Current edition approved June 30, 1975. Published August 1975. Originally Annual Book of ASTM Standards, Vol 10.02.
8
published as D2442–65T. Last previous edition D2442–72. Annual Book of ASTM Standards, Vol 03.01.
2 9
Annual Book of ASTM Standards, Vol 15.01. Annual Book of ASTM Standards, Vol 15.05.
3 10
Annual Book of ASTM Standards, Vol 15.02. Annual Book of ASTM Standards, Vol 14.02.
4 11
Annual Book of ASTM Standards, Vol 03.05. Annual Book of ASTM Standards, Vol 03.03.
5 12
Annual Book of ASTM Standards, Vol 10.01. Annual Book of ASTM Standards, Vol 10.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 2442
TABLE 1 Electrical Requirements
MIL-STD-105 Sampling Procedures and Tables for Inspec-
13
tion by Attributes Property Type I Type II Type III Type IV
MIL-STD-883 TestMethodsandProceduresforMicroelec-
Dielectric constant,
14
max 25°C:
tronics
at 1 MHz 8.8 9.6 9.8 10.1
15
ANSIB46.1
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