ASTM C690-03

Standard Test Method for Particle Size Distribution of Alumina or Quartz by Electric Sensing Zone Technique

SIGNIFICANCE AND USE
This test method is useful to both sellers and purchasers of alumina and quartz powders for determining particle size distributions for materials specifications, manufacturing control, and development and research.
SCOPE
1.1 This test method, one of several found valuable for the measurement of particle size, covers the determination of the particle size distribution of alumina or quartz powders (0.6 to 56.0 m) using electrical sensing zone particle size analyzers. These instruments use an electric current path of small dimensions which is modulated by individual particle passage through an aperture, and produces individual pulses of amplitude proportional to the particle volume.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety problems, 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-Sep-2003
• ICS: 81.060.10 - Raw materials
• Technical Committee: C21 - Ceramic Whitewares and Related Products
• Drafting Committee: C21.04 - Raw Materials

Relations

• Replaces: ASTM C690-86(1997)e1 - Standard Test Method for Particle Size Distribution of Alumina or Quartz by Electric Sensing Zone Technique
• Effective Date: 01-Oct-2003
• Replaced By: ASTM C690-09 - Standard Test Method for Particle Size Distribution of Alumina or Quartz by Electric Sensing Zone Technique
• Effective Date: 15-Feb-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C690–03
Standard Test Method for
Particle Size Distribution of Alumina or Quartz Powders by
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Electrical Sensing Zone Technique
This standard is issued under the fixed designation C 690; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Apparatus
1.1 This test method, one of several found valuable for the 4.1 Electrical Sensing Zone Particle Counter. Coulter
2
measurement of particle size, covers the determination of the Counter Models MSII, MS IIe, and MS 3
particle size distribution of alumina or quartz powders (0.6 to 4.2 Aperture Tubes, diameter ranging from approximately
56.0 µm) using electrical sensing zone particle size analyzers. 30 to 140 µm. The diameter required is dependent upon the
These instruments use an electric current path of small dimen- particle size distribution of the sample. Generally any given
sions which is modulated by individual particle passage tube will cover a particle size range from 2 to 60 % of its
through an aperture, and produces individual pulses of ampli- aperture diameter.
tude proportional to the particle volume.
NOTE 1—In certain cases, apertures up to 280 µm are usable.
1.2 The values stated in SI units are to be regarded as the
4.3 Sample Beaker, capable of maintaining all particles
standard.
uniformly in suspension (for example, round-bottom).
1.3 This standard does not purport to address all of the
4.4 Blender,capacity1-Lglasscontainer.Ameanstocontrol
safety problems, if any, associated with its use. It is the
speed is required.
responsibility of the user of this standard to establish appro-
4.5 Beakers, 100, 500, and 1000-mL.
priate safety and health practices and determine the applica-
4.6 Pipet.
bility of regulatory limitations prior to use.
4.7 Wash Bottles.
2. Summary of Test Method 4.8 Membrane Filtering Device, rated at 0.45-µm filters or
3
finer.
2.1 A carefully dispersed, dilute suspension of the powder
inabeakerfilledwithanelectrolyteisplacedontheinstrument
5. Reagents
sample stand. The suspension is forced through a restricting
5.1 Purity of Reagents—Reagent grade chemicals shall be
aperture. Each particle passing generates an electric pulse that
used in all tests. Unless otherwise indicated, it is intended that
is recorded on an electronic counter.
all reagents shall conform to the specifications of the Commit-
2.2 The instrument response is essentially related to particle
tee onAnalytical Reagents of theAmerican Chemical Society,
volume (liquid displacement). Equivalent spherical diameter is
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where such specifications are available. Other grades may be
commonlyusedtoexpress the particle size. (Comparisonswith
used, provided it is first ascertained that the reagent is of
other techniques have been found to be good for spherical
sufficiently high purity to permit its use without lessening the
particles; for non-spherical particles results may differ.)
accuracy of the determination.
3. Significance and Use
3.1 This test method is useful to both sellers and purchasers
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The sole source of supply of the apparatus known to the committee at this time
of alumina and quartz powders for determining particle size
is Beckman Coulter, Inc., Miami, FL 33196. If you are aware of alternative
distributions for materials specifications, manufacturing con-
suppliers, please provide this information to ASTM International Headquarters.
Your comments will receive careful consideration at a meeting of the responsible
trol, and development and research.
2
technical committee , which you may attend.
3
ThemembranefiltersmaybetheMillipore,Pallmetaltype,orotherequivalent.
1 4
ThistestmethodisunderthejurisdictionofASTMCommitteeC21onCeramic Reagent Chemicals, American Chemical Society Specifications, American
Whitewares and Related Products and is the direct responsibility of Subcommittee Chemical Society, Washington, DC. For suggestions on the testing of reagents not
C21.07 on Nonplastics. listed by the American Chemical Society, see Analar Standards for Laboratory
Current edition approved Oct. 1, 2003. Published November 2003. Originally Chemicals, VWR International Ltd., U.K., and the United States Pharmacopoeia,
e1
approved in 1971. Last previous edition approved in 1997 as C 690 – 86 (1997) . USPC, Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C690–03
maintainauniformparticlesuspensionwhilewithdrawingthesample.The
5.2 Dispersing Media—Ten percent solution of purified or
pipet should deliver all of the withdraw
...