Which electrical property changes when an ionic crystal is heated near its melting point?

💡 Explanation

When ionic crystals are heated near melting, increased thermal vibrations overcome lattice binding energy, promoting ion mobility via the Frenkel defect mechanism, resulting in higher ionic conductivity. Therefore an increase in ionic conductivity results, rather than changes to dielectric strength, carrier concentration, or piezoelectricity which involve different mechanisms in other materials.

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