Question:
Which of the following is not an Opacifier?
Which of the following is not an Opacifier?
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Opacifiers are added to reduce transparency; alumina is mainly a stabilizer and refractory oxide, not a common opacifier.
Updated On: May 7, 2026
- \(As_2O_3\)
- \(Sb_2O_3\)
- \(ZnO\)
- \(Al_2O_3\)
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The Correct Option is D
Solution and Explanation
Concept:
Opacifiers are materials added to glazes or glasses to make them opaque by scattering light.
Step 1: In ceramic glaze, opacity is produced by adding special oxides.
Step 2: These oxides scatter light and reduce transparency.
Step 3: \(As_2O_3\), \(Sb_2O_3\), and \(ZnO\) can act as opacifying agents in ceramic/glass systems.
Step 4: \(Al_2O_3\) is mainly used as an alumina source. It improves viscosity, strength, and stability of glaze or ceramic body.
Step 5: It is not generally considered a standard opacifier among the given options. Therefore, the compound which is not an opacifier is: \[ \boxed{Al_2O_3} \]
Step 1: In ceramic glaze, opacity is produced by adding special oxides.
Step 2: These oxides scatter light and reduce transparency.
Step 3: \(As_2O_3\), \(Sb_2O_3\), and \(ZnO\) can act as opacifying agents in ceramic/glass systems.
Step 4: \(Al_2O_3\) is mainly used as an alumina source. It improves viscosity, strength, and stability of glaze or ceramic body.
Step 5: It is not generally considered a standard opacifier among the given options. Therefore, the compound which is not an opacifier is: \[ \boxed{Al_2O_3} \]
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