- Dunt
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Contents
Ceramics
Dunting is a fault that can occur during the firing of ceramic articles. It is the "cracking that occurs in fired ceramic bodies as a result of a thermally induced stress" [1] and is caused by a "ware cooled too quickly after it has been fired"[2][3].
Although usually occurring during cooling dunts can also be caused be excessively fast heating rates. Heating dunts can be recognised by rounded edges to the cracks as the glaze matured after they occurred, whereas cooling dunts have sharp edges [4][5].
It has been found that bodies formulated with quartz rather than flint were more susceptible to dunting, especially on re-fire. It was postulated this may be related to the lower Young's modulus of the quartz based bodies.[6]
English
Noun
A dunt - a dull-sounding blow (Scots)[7].
Verb
To dunt - to knock with such a blow (Scots). Also, a contraction of doesn't (itself a contraction of does not) in certain colloquial forms of English[8].
See also
- Pottery
- Ceramics (art)
References
- ^ "Standard Terminology of Ceramic Whitewares and Related Products." ASTM C242-01. ASTM International.
- ^ "Dictionary of Ceramics", Third edition. A.Dodd A. D.Murfin. Institute of Materials. 1994. ISBN 0-901716-56-1
- ^ "Dunting Temperature Measurement." K.Marshall, W.Roberts. British Ceramic Research Association. TN 143.1969.
- ^ "Dictionary of Ceramics", Third edition. A.Dodd A. D.Murfin. Institute of Materials. 1994. ISBN 0-901716-56-1
- ^ "Dunting - A Serious Problem Of Ceramics Industry." S.K.Mukherji. Indian Ceramics. 27, (2), 36, 1984.
- ^ "Quartz V Flint. Pt.2. Aspects Related To Refire Dunting." K.Marshall, W.Roberts. British Ceramic Research Association. TN 141 Pt.2. 1969.
- ^ *OED 2nd edition 1989
- ^ *OED 2nd edition 1989
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