Ceramics - composed of two elements, more complex structures than metals
Ceramics bonding - purely ionic to totally covalent
Ion sizes and arrangment in ceramics - size of anion is much greater than the cation. anions want to
touch as many cations as possible (to be most stable)
Crystal structure influence - electrical charge of ion (must be 0, neutral) and relative sizes of anion and
cation (rc/ra is less than 1)
Coordinate number is based on - ratio of radii (rc/ra)
Most common coordination numbers in ceramics - 4,6,8
Coordination #12 - rc/ra > 1
Size of ion depends - coordination number increasing (radius increases with the number of the
neighbour the opposite charge), charge of ion (radius increases with the ions of number of e-)
AX ceramic - #cations = # anions
Rock salt structure - 4 atoms (similar to FCC), a = 2(rc+ra)
Cesium chloride - 1 formula unit, a = 2/sqrt3(rc+ra), anions at the corner and cation in the middle
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller VasilyKichigin. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
