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A Glaze That Fits Its Tile 4 questions
A Glaze That Fits Its Tile
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A ceramics exhibit models a thin glassy glaze bonded to a tile. When cooled through the same temperature range, a free sample of each material contracts by the amount in the table. On a coated tile the glaze and tile stay attached, so they cannot both contract freely by different amounts.
| Material | Contraction of a free sample (mm per m) |
|---|---|
| Tile | 3.0 |
| Glaze J | 3.2 |
| Glaze K | 5.0 |
| Glaze L | 2.8 |
Question 1
Which glaze has the largest difference from the tile’s free contraction?
- J
- K
- L
- All have the same difference.
Question 2
Explain why glaze K on the tile can be stretched during cooling, even though a free piece of K would shrink.
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In the exhibit model, glaze J and glaze L both pass an initial cooling test. The class now wants to know which stays intact after repeated warming and cooling.
Question 3
Describe a comparison that could distinguish their performance after repeated use. State what to keep the same and what to measure.
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Question 4
A student says J and L will necessarily behave the same because their contraction differences have equal magnitude. Explain one relevant difference in their measured values.
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