Ceramics week 1 - Properties and bonding

Properties of ceramics

Generally strong and hard, brittle, good insulators, chemical resistant, temp stable. Can have exceptions ofc

What predicts bond type between two atoms?

Electronegativity difference: similar → covalent; different → ionic

How is bond length r₀ calculated?

r₀ = r_M + r_X (sum of ionic radii)

What defines r₀ and E_bond on the E–r curve?

The minimum, where attractive and repulsive contributions balance

Ionic character

X is electronegativity

What determines covalent bond strength

1. High bond order have smaller interatomic distances (“r0 ”) 2. High bond order (number of electron pairs that holds 2 electrons together) have higher bond energies. 3. Bonding to bigger atoms is weaker.