Discussion
Consider the following statements about classifying ceramic raw materials.
1. Plastic and non-plastic is the primary functional division.
2. A material's role can differ between bodies.
3. Advanced ceramics are defined by their firing temperature.
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: plastic against non-plastic is the primary functional division, and a material’s role varies between bodies. Statement 3 misdefines advanced ceramics, which are characterised by synthetic, high purity, closely controlled powders and by the properties engineered from them - not by firing temperature, which a traditional refractory may well exceed.
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