Curie Temperature — FRCA Primary MCQ
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Correct answer: B — Loses its piezoelectric properties due to loss of ordered molecular dipole structure
Above the Curie temperature the ordered dipole structure becomes randomly oriented eliminating piezoelectric properties. The Curie temperature varies by material (~350°C for quartz). Piezoelectric crystals are used in ultrasound transducers converting electrical to mechanical energy and vice versa.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment