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← ScienceWhich outcome results when thermal stress overcomes ionic bonding in fused magnesia ceramics?
A)Induced piezoelectric charge generation appears
B)Crystal lattice fracture propagation happens✓
C)Increased superparamagnetism becomes noticeable
D)Significant electron tunneling becomes conductive
💡 Explanation
Crack propagation occurs because the ionic bonds, while strong, undergo brittle fracture via rapid **Griffith crack propagation** under thermal stress leading to lattice failures; therefore, the ceramic shatters, rather than bending (piezoelectricity) or changing electronic properties.
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