ASTM F7-95(2021)

Standard Specification for Aluminum Oxide Powder (Withdrawn 2023)

ABSTRACT
This specification covers aluminum oxide (alumina) powder in two classes of particle size, two chemical grades, and two levels of acidity. Aluminum oxide powder shall conform to the chemical composition requirements indicated in this specification. The alumina powder shall be tested for water-soluble content, particle size, and hydrogen-ion concentration according to the procedures in this specification.
SCOPE
1.1 This specification covers aluminum oxide (alumina) powder in two classes of particle size, two chemical grades, and two levels of acidity, for use as an insulating coating or as an ingredient of ceramic mixtures for components of electronic devices as follows:  
1.1.1 Particle Sizes:
1.1.1.1 Class A—Particle size No. 500 nominal mesh (nominal average particle size = 24.3 μm).
1.1.1.2 Class B—Particle size No. 900 nominal mesh (nominal average particle size = 1.7 μm).  
1.1.2 Chemical Grades—Grades 1 and 2 as specified under chemical requirements in Section 3.  
1.1.3 Acidity Levels: pH (acid) 4.5 to 6.5 and pH (neutral) 6.5 to 7.5.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 The following safety hazards caveat pertains only to the test methods in this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
WITHDRAWN RATIONALE
This specification covers aluminum oxide (alumina) powder in two classes of particle size, two chemical grades, and two levels of acidity, for use as an insulating coating or as an ingredient of ceramic mixtures for components of electronic devices.
Formerly under the jurisdiction of Committee F01 on Electronics, this specification was withdrawn in November 2023. This standard is being withdrawn without replacement because Committee F01 was disbanded.

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-2021
• Withdrawal Date: 26-Nov-2023
• ICS: 71.060.20 - Oxides
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Refers: ASTM E70-07(2015) - Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
• Effective Date: 01-Jun-2015
• Refers: ASTM C183-13 - Standard Practice for Sampling and the Amount of Testing of Hydraulic Cement
• Effective Date: 01-Aug-2013
• Refers: ASTM C183-02 - Standard Practice for Sampling and the Amount of Testing of Hydraulic Cement
• Effective Date: 10-Dec-2002
• Refers: ASTM C183-97 - Standard Practice for Sampling and the Amount of Testing of Hydraulic Cement
• Effective Date: 10-Jul-1997

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F7 −95 (Reapproved 2021)
Standard Specification for
Aluminum Oxide Powder
This standard is issued under the fixed designation F7; the number immediately following the designation indicates the year of original
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers aluminum oxide (alumina)
C183Practice for Sampling and the Amount of Testing of
powder in two classes of particle size, two chemical grades,
Hydraulic Cement
and two levels of acidity, for use as an insulating coating or as
E70Test Method for pH of Aqueous Solutions With the
aningredientofceramicmixturesforcomponentsofelectronic
Glass Electrode
devices as follows:
1.1.1 Particle Sizes:
3. Chemical Composition
1.1.1.1 Class A—Particle size No. 500 nominal mesh
3.1 For a specified particle size and level of acidity, the
(nominal average particle size=24.3 µm).
aluminum oxide shall conform to the requirements of Table 1
1.1.1.2 Class B—Particle size No. 900 nominal mesh
as to chemical composition.
(nominal average particle size=1.7 µm).
1.1.2 Chemical Grades—Grades 1 and 2 as specified under
4. Physical Properties
chemical requirements in Section 3.
4.1 The alumina shall be “chalk white,” dry, free from
1.1.3 Acidity Levels: pH (acid) 4.5 to 6.5 and pH (neutral)
lumps,andofparticlesizedistributionasagreeduponbetween
6.5 to 7.5.
purchaser and seller.
1.2 The values stated in SI units are to be regarded as
5. Sampling
standard. No other units of measurement are included in this
standard.
5.1 Each lot of alumina shall be properly sampled in
accordance with standard techniques, such as Practice C183.
1.3 The following safety hazards caveat pertains only to the
test methods in this specification. This standard does not
6. Test Methods
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
6.1 Water-Soluble Content:
to establish appropriate safety, health, and environmental
6.1.1 Procedure—Determine the total water-soluble content
practices and determine the applicability of regulatory limita-
by measuring the electrical conductivity of a 100-mL distilled
tions prior to use.
or deionized water extract from a 5-g sample of alumina.
Elutriate by vigorously shaking the alumina suspension in a
1.4 This international standard was developed in accor-
flask for 1 to 2 min, allowing the solids to settle and decanting
dance with internationally recognized principles on standard-
the clear supernatant liquid after 60 min. Measure the conduc-
ization established in the Decision on Principles for the
tivity of the liquid with a standard cell and bridge. Correct this
Development of International Standards, Guides and Recom-
measurement for the “blank” reading on a similarly treated
mendations issued by the World Trade Organization Technical
equal volume of the same pure water. Convert the net increase
Barriers to Trade (TBT) Committee.
in conductivity of the water extract first to parts of water-
soluble content as sodium chloride (NaCl) per million parts of
water(factoris1micromho=0.5ppmNaCl),thenrelatetothe
actual weight of elutriated alumina. For example, on a typical
100-mL extract 10 micromhos (net) or 5 parts of NaCl per
This specification is under the jurisdiction of ASTM Committee F01 on
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
Materials, Wire Bonding, and Flip Chip. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2021. Published March 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1958. Last previous edition approved in 2016 as F7–95(2016). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F0007-95R21. the ASTM website.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
F7−95 (2021)
TABLE 1 Chemical Requirements shown in Table 2 are described in the operating manuals of the equipment
listed.
Composition, %
Element or Compound
Grade 1 Grade 2 6.2.2 Number average particle size may be taken as the
Alumina (Al O ), min 99.65 99.65 50% point on the particle size distribution curve or may be
2 3
Silica (SiO ), max 0.03 0.12
measured by the Fisher sub-sieve sizer.
Magnesia (MgO), max 0.02 0.01
6.2.3 A density of 3.97 g/cm for alu
...

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: F7 − 95 (Reapproved 2021)
Standard Specification for
Aluminum Oxide Powder
This standard is issued under the fixed designation F7; 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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers aluminum oxide (alumina)
C183 Practice for Sampling and the Amount of Testing of
powder in two classes of particle size, two chemical grades,
Hydraulic Cement
and two levels of acidity, for use as an insulating coating or as
E70 Test Method for pH of Aqueous Solutions With the
an ingredient of ceramic mixtures for components of electronic
Glass Electrode
devices as follows:
1.1.1 Particle Sizes:
3. Chemical Composition
1.1.1.1 Class A—Particle size No. 500 nominal mesh
3.1 For a specified particle size and level of acidity, the
(nominal average particle size = 24.3 µm).
aluminum oxide shall conform to the requirements of Table 1
1.1.1.2 Class B—Particle size No. 900 nominal mesh
as to chemical composition.
(nominal average particle size = 1.7 µm).
1.1.2 Chemical Grades—Grades 1 and 2 as specified under
4. Physical Properties
chemical requirements in Section 3.
4.1 The alumina shall be “chalk white,” dry, free from
1.1.3 Acidity Levels: pH (acid) 4.5 to 6.5 and pH (neutral)
lumps, and of particle size distribution as agreed upon between
6.5 to 7.5.
purchaser and seller.
1.2 The values stated in SI units are to be regarded as
5. Sampling
standard. No other units of measurement are included in this
standard.
5.1 Each lot of alumina shall be properly sampled in
accordance with standard techniques, such as Practice C183.
1.3 The following safety hazards caveat pertains only to the
test methods in this specification. This standard does not
6. Test Methods
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
6.1 Water-Soluble Content:
to establish appropriate safety, health, and environmental
6.1.1 Procedure—Determine the total water-soluble content
practices and determine the applicability of regulatory limita-
by measuring the electrical conductivity of a 100-mL distilled
tions prior to use. or deionized water extract from a 5-g sample of alumina.
Elutriate by vigorously shaking the alumina suspension in a
1.4 This international standard was developed in accor-
flask for 1 to 2 min, allowing the solids to settle and decanting
dance with internationally recognized principles on standard-
the clear supernatant liquid after 60 min. Measure the conduc-
ization established in the Decision on Principles for the
tivity of the liquid with a standard cell and bridge. Correct this
Development of International Standards, Guides and Recom-
measurement for the “blank” reading on a similarly treated
mendations issued by the World Trade Organization Technical
equal volume of the same pure water. Convert the net increase
Barriers to Trade (TBT) Committee.
in conductivity of the water extract first to parts of water-
soluble content as sodium chloride (NaCl) per million parts of
water (factor is 1 micromho = 0.5 ppm NaCl), then relate to the
actual weight of elutriated alumina. For example, on a typical
100-mL extract 10 micromhos (net) or 5 parts of NaCl per
This specification is under the jurisdiction of ASTM Committee F01 on
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
Materials, Wire Bonding, and Flip Chip. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2021. Published March 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1958. Last previous edition approved in 2016 as F7 – 95 (2016). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F0007-95R21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F7 − 95 (2021)
TABLE 1 Chemical Requirements
shown in Table 2 are described in the operating manuals of the equipment
listed.
Composition, %
Element or Compound
Grade 1 Grade 2 6.2.2 Number average particle size may be taken as the
Alumina (Al O ), min 99.65 99.65 50 % point on the particle size distribution curve or may be
2 3
Silica (SiO ), max 0.03 0.12
measured by the Fisher sub-sieve sizer.
Magnesia (MgO), max 0.02 0.01
6.2.3 A density of 3.97 g/cm for aluminum oxide will be
Ferric oxide (Fe O ), max 0.04 0.04
2 3
Total alkali (as Na O), max 0.04 0.04 used
...