ASTM C242-12

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation:C242–12
Standard Terminology of
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Ceramic Whitewares and Related Products
This standard is issued under the fixed designation C242; 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 absorbance—the logarithm of that fraction of an incident light
beam that is dissipated in the sample, being neither trans-
1.1 This terminology pertains to the terminology used in
mitted nor reflected.
ceramic whitewares and related products.
absorbed moisture—water held mechanically in the material
1.2 Words adequately defined in standard dictionaries are
and having physical properties not substantially different
not included. Included are words that are peculiar to this
from ordinary water at the same temperature and pressure.
industry. Double words, hyphenated words, or phrases are
absorption—(1) the relationship of the weight of the water
listed alphabetically under the first word; additional important
absorbed by a ceramic specimen, subjected to prescribed
words are cross-referenced.
immersion procedure, to the weight of the dry specimen.
1.3 For definitions of terms relating to surface imperfec-
(2) the capacity of a substance to take up a substance,
tions on ceramics, refer to Terminology E109.
usually a liquid or gas, with the formation of an apparently
2. Referenced Documents homogeneous mixture.
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adsorption—the capacity of a substance to accept and retain
2.1 ASTM Standards:
on its surface a layer of another substance, usually a gas or
D1129 Terminology Relating to Water
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a liquid.
E109 MethodforDryPowderMagneticParticleInspection
agglomerate—a jumbled mass or collection of two or more
E180 Practice for Determining the Precision of ASTM
particles or aggregates, or a combination thereof, held
Methods for Analysis and Testing of Industrial and Spe-
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together by relatively weak cohesive forces caused by weak
cialty Chemicals
chemical bonding or an electrostatic surface charge gener-
F465 Recommended Practice for Developing Precision and
ated by handling or processing.
Accuracy Data onASTM Method for theAnalysis of Meat
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and Meat Products
DISCUSSION—Common usage in powder technology (and British
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2.2 British Standard:
Standard BS 2955) has the terms “aggregate” and “agglomerate”
interchanged in meaning from the definitions presented here, and care
BS 2955 Glossary of Terms Relating to Powders
must be taken to determine in context which definition is in use.
3. Terminology
aggregate—a dense mass of particles held together by strong
absolute or true density—See absolute or true density under
intermolecular or atomic cohesive forces that is stable to
density.
normal mixing techniques, including high-speed stirring and
ultrasonics.
alumina porcelain—See alumina porcelain under porcelain.
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This terminology is under the jurisdiction of ASTM Committee C21 on
alumina whiteware—See alumina whiteware under ceramic
Ceramic Whitewares and Related Products and is the direct responsibility of
Subcommittee C21.01 on Editorial and Teminology. whiteware.
Current edition approved May 1, 2012. Published May 2012. Originally
andalusite—a polymorph, along with sillimanite and kyanite,
approved in 1950. Last previous edition approved in 2007 as C242 – 01 (2007).
of composition Al O ·SiO which on firing dissociates to
2 3 2
DOI: 10.1520/C0242-12.
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yield principally mullite.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
apparent or pycnometric density—See apparent or pycnomet-
Standards volume information, refer to the standard’s Document Summary page on
ric density under density.
the ASTM website.
3 apparent porosity—See apparent porosity under porosity.
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org. average particle size—a single value representing the entire
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Available from British Standards Institute, 2 Park St., London, England
particle-size distribution.
W1A 2B5.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
C242–12
DISCUSSION—It is essential to specify the basis under which the
cassiterite (SnO )—an inorganic mineral of the tetragonal
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average is obtained.
form used as a source of tin and tin oxide.
casting—a process for forming ceramic ware by introducing a
b
...