The opacity in ceramics is achieved by adding_______________?
Correct answer: D. Titanium oxide
- A. Boric oxide
- B. Copper oxide
- C. Silica
- D. Titanium oxide
Explanation
Titanium oxide is an effective opacifier because its high refractive index scatters light within the ceramic. Silica forms the glass network, whereas boric oxide mainly modifies the glass and copper oxide is primarily a colouring oxide.
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