Question:
\(\ldots\ldots\ldots\ldots\ldots\) defect occurs when thermal expansion of the body is much higher than that of the glaze.
\(\ldots\ldots\ldots\ldots\ldots\) defect occurs when thermal expansion of the body is much higher than that of the glaze.
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Peeling occurs when glaze and body are not thermally compatible and the glaze separates from the ceramic body.
Updated On: May 7, 2026
- Crawling
- Crazing
- Dunting
- Peeling
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The Correct Option is D
Solution and Explanation
In glazed ceramic ware, the glaze layer and the ceramic body must have compatible thermal expansion.
If their thermal expansion values are not properly matched, defects occur after firing and cooling.
Here, the question says that the thermal expansion of the body is much higher than that of the glaze.
This means the body contracts more than the glaze during cooling.
Because the body shrinks more, it creates stress at the interface between the glaze and the body.
When this stress becomes large, the glaze may separate from the body surface.
This separation of glaze from the body is called peeling.
Crawling is a defect where glaze pulls away during firing and leaves bare patches.
Crazing is the formation of fine cracks in glaze.
Dunting is cracking due to thermal shock or sudden temperature change.
Therefore, the defect caused when body expansion is much higher than glaze expansion is:
\[
\text{Peeling}.
\]
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