Zircon refractories have__________________?
Correct answer: C. All A., B. and C.
- A. Low co-efficient of expansion
- B. High RUL (1600°C) and refractoriness (> 2000°C)
- C. All A., B. and C.
- D. High spalling resistance
Explanation
Zircon refractories have low thermal expansion, high refractoriness above 2000°C, a high refractoriness-under-load value near 1600°C, and good resistance to thermal spalling. Therefore all three listed properties apply.
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